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!Spark/!Help
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn hard disk » apps » Spark |
| Filename: | !Spark/!Help |
| Read OK: | ✔ |
| File size: | 9209 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
->!readme
Spark
=====
(A Super Archiver for RISC OS)
========================================================================
This disc contains a preliminary version of Spark 2.00. This is not
totally complete. However, I think that you may be interested to see
what new features are going to be available and perhaps make suggestions
as to how things could be improved. In most aspects, the program does
work but don't blame me if occasionally things go wrong.
========================================================================
Introduction
============
Spark, is a multitasking RISC OS archive program featuring, easy wimp driven
operation, command line operation, script files, archiving of directories,
background operation, message driven operation, DES data encryption, btoa
coding and atob decoding (CET+ Telesoftware), uucoding and uudecoding,
and direct RAM transfer of files to and from applications.
Getting Started
===============
This disc contains a directory/application !Spark, open a viewer on
the disk, from the desktop, and double click on the !Spark icon. This will
then appear on the icon bar at the bottom of the screen. Spark is now resident,
and you can use it on archives.
On the Archimedes, archives have filetype DDC. Spark, will only recognise
archives if they have the correct type. If you have downloaded an archive,
then most probably, it will have the wrong type. Before using Spark on it,
you should set the correct filetype using;
*settype <filename> DDC
If the file has the correct type, it will be displayed as a small 'ark' icon.
You can open the archive in two ways;
(a) double click on it.
(b) drag it onto the !Spark icon on the icon bar.
Either of these actions, will open an ADFS style viewer showing the contents
of the archive. As with normal viewers, file types are shown by appropriate
icons. Directories, are shown as a small folder. A new icon, is the 'IBM' one,
this denotes a file that was archived using IBM style archiving. Further,
archived applications will not be shown with their usual icon, instead they
will appear as a generic application directory. As with normal viewers, you
can move around the directories by double clicking and closing viewers.
Files can be extracted from the archive by dragging them from the archive
window, and into a normal disc viewer. Similarly, files can be added by
dragging them from disc and into the Archive viewer. You can mark files using
the adjust mouse button as usual. A drag on one marked file will then effect
all of them.
Since typing '*settype...' can be tedious, it is possible to force Spark to
treat any file as an archive by dragging it onto the Spark icon on the icon
bar. If the file is not an archive, then probably Spark will complain.
If the file is successfully loaded, then its type will be set to DDC. This
is very handy, if your communications program does not set the types of
files which you download.
Using the Menus
===============
Spark has two menus, both accessed by pressing the middle mouse menu button.
The first, is revealed by clicking on the Spark icon on the icon bar. This
has four options;
Info
====
Moving the mouse pointer over the righthand arrow, will popup a dialogue box,
containing information about which version of Spark you have. Please quote
this in any correspondence.
Quit
====
This allows you to terminate Spark.
New Arc
=======
Popping up the dialogue box to the right of this, displays a file icon which
you can drag to a disc viewer to create a new archive with the name given in
the icon beneath it. You can type in any name you choose here.
Command
=======
This opens the command line window. You can enter Spark command lines in
this, and it will show what Spark is doing whilst it executes script files.
An icon, shows if Spark is busy or not.
The second menu is displayed by clicking with the mouse pointer over any
archive viewer. The options on this are;
Display
=======
Very similar to the 'Display' option on the usual filer menu, this allows
you to control (via the small sub menu to the right) the format in which
files in archives will be displayed.
Item
====
This will vary depending on what is selected in the viewer,
it may read 'file <filename>' or 'dir. <directory name>' or 'Selection'.
Popping up the attached 'Action' menu, gives two choices 'delete' which
deletes whatever is marked or 'info' popping up a further dialogue box on
the right, will give useful information on whatever is selected. It also
allows you to save the selected items in an archive in three forms.
(1) uucode
(2) btoa
(3) archive
These options allow you to btoa or uucode an archive or to save just some
objects in it as another archive. If you want to uucode the entire archive,
use 'Select All' on the root directory of the archive and then save as a
uucoded file. btoa coding, is just the opposite of atob coding as used by
CET+ Telesoftware. The point of uucoding and atob coding, is that they convert
binary files into ASCII (text files). Many communications systems are either
designed for only transferring mail (i.e. communications readable by people)
or operate using 7 bits. These coding schemes offer a way of transferring
binary files through such systems. Converting from 8 to 7 bits can be done
in various ways with varying efficiencies. In fact atob coding is more
efficient than uucoding. However the difference is only a few percent.
btoa stands for binary to ASCII and atob for ASCII to binary.
Telesoftware systems use their own 7 to 8 bit conversion called CET. Whilst
this is not too bad for text files, it is very inefficient for binary files.
As a result, the modern approach, is to use btoa coding before CET coding.
This means the CET coder only ever sees a text file and passes it along
almost transparently. Often this is called CET+. Archives are highly binary
files (perfect data compression tends to produce a uniform distribution
of byte values 0-255) and so bypassing CET (or any other inefficient code)
is particularly important for them. Going from 8 to 7 bits will make files
bigger although, atob does have a kind of data compression built into it.
Note that the uucoded file will be split if uucode Split is selected on
the Options menu.
Select All
==========
Selects everything in the viewer.
Clear Selection
===============
Unselects everything in the viewer.
New Directory
=============
Allows you to create a new directory inside the current archive viewer.
Open Parent
===========
This opens a viewer on the parent of any viewer that has one.
Open Directory
==============
Opens the directory in which the archive is contained.
Option
======
This points to a sub menu described below
Test
====
Clicking on this will perform a test on the integrity of the archive. If any
errors are found they will be reported. Notice that this actually makes sure
that the data in the archive can be decompressed successfully.
DES
===
This allows you to specify a password to be used to encrypt files in the
archive. Note that if you encode your data in this way, it will be impossible
to retrieve it without the original password. Attempting to unpack an archive
with the wrong password, will result in a corrupt file. The DES encryption
scheme, is that designed by the US NSA, it is supposed to be very difficult
to break.
Garble
======
This is another form of password protection for data in archives. It is
provided for compatibility with earlier archive programs. In general, this
technique of encryption is quite good. However, under certain circumstances,
it is easy to break. Therefore, DES is the recommended method of encrpyting
archive entries. Notice that every entry in an archive can have a different
password although this is likely to prove confusing.
If you try to unpack an archive with the wrong password, you will get an error
message stating that the compressed data is corrupt.
The Options Menu
================
The following options are available from the options submenu.
PC Format
=========
When ticked, this denotes that files added to the archive will be added in
PC archive format.
Crunch
======
When ticked, files added to the archive will be compressed using PC arc style
crunching.
Squash
======
When ticked, files added to the archive will be compressed using PKARC style
squashing.
Compress
========
When ticked, files added to the archive will be compressed. The sub menu
to the right, allows you to set how many bits will be used. The more bits
are used, the greater the saving in space. However, more memory is needed
to actually do the data compression. No extra memory is needed to uncompress
a file no matter how many bits were used in originally making it. So, it
may be worthwhile to make lots of free memory and use 16 bits for packing
things. Compress is only supported by versions of Spark after and including
2.00. 16 bit compression, requires around 500K of free memory.
Notice, that if you use Compress, whoever you give the archive to, must
have a version of Spark capable of unpacking it.
No Compression
==============
Files added to the archive will not be compressed when this option is
selected.
Update
======
If update is ticked, files will only be added to the archive if they have more
recent datestamps than any existing copy in the archive or if they do not
already exist in the archive.
Freshen
=======
If freshen is ticked, files will only be added to the archive if they have more
recent datestamps than any existing copy in the archive. If the file does not
exist in the archive, it will not be added.
Note that Freshen and Update are mutually exclusive.
Overwrite
=========
If overwrite is selected, files extracted from the archive will replace
existing copies on disc. However, if overwrite is not selected, and you attempt
to overwrite a file, a dialogue box will appear seeking confirmation and
giving you the oportunity to rename the file.
Retain Backup
=============
Whenever an archive is modified, a copy with a name of the form b_archivename
is created. After a successful modification, this file is normally deleted.
By selecting this option, you can make Spark retain the backup copy.
RAM Transfer
============
When you drag a file from one application to another, the data can be
transferred in one of two ways. First, directly in RAM, second, the first
application can use the system variable Wimp$Scrap to create a file
and put the data in it. The second application then loads the file and
finally, the file is deleted. The disadvantages of Wimp$Scrap are
that it is slow, and uses valuable disc space. For these reasons, Spark
now uses RAM transfer. There is one snag, if RAM transfer is used,
files can only be read once. Normally this poses no problem however,
if Spark finds that it cannot compress a file it will try to just store
it and this means reloading the file. If the file has come via RAM this
can't be done, so Spark has to save the file in an expanded state.
To get around this problem, this menu option allows you to tell Spark
if it should use RAM transfer or Wimp$Scrap. Experience shows that things
like text files and sprites almost always compress well. It is only things
like files which have already been compressed in some way or very short files
that have this problem of not compressing. In general, leave RAM Transfer
selected but be aware of the possibilities. At present, Wimp$Scrap is
always used when a file is run from an archive.
Some Points About Wimp$Scrap
============================
Wimp$Scrap, is a full filename that is used for temporary files.
It makes sense to have this pointing at a large area of high speed disc.
On a 310 with hard disc, the hard disc is the right place and on a 440 perhaps
the RAM disc would be best. On a machine with limited memory and only one
floppy, care must be taken or you will end up doing a lot of disc swopping.
If Wimp$Scrap is not defined and you open a viewer on !System, then it
will be defined to point into that !System directory. You can force
the file to be in a particular !System by double clicking on !System.
It may be best to copy !Spark and !System onto the disc with the archived data;
then double click on !System before starting to use Spark.
uucode Split
============
The menu to the right of this option, allows you type in the maximum number
of lines you want to be in each sub file produced by uucoding an archive.
Only if this option is ticked, will the uucoded file be split into chunks.
Save Options
============
This allows you to save the settings of the above options so that the next time
you run Spark, they will be automatically set up for you.
Note that there is the possibility for confusion here. If you save a set of
options and forget, Spark may appear to misbehave. For example, if update is
set, you cannot add new files to archives.
Further Points
==============
Directories, can be archived by simply dragging them into the archive in the
usual way.
You can transfer files to/from applications by the usual file icon dragging
technique.
It is also possible to run files from the archive by double clicking on them.
This can be quite useful, for example double clicking on text files should
either type them or load them into your editor. Applications i.e. !directories
cannot be run.
Don't be fooled by the apparently poor figures for compressing directories.
Because directories are not compressed, they appear to reduce the efficiency
of Spark. However, the files in directories are compressed as much as possible.
If you were investigate the total size of files in a directory, things would
look much better.
If you intend to put irreplaceable or valuable data in an archive and
throwaway the original. Then it is advisable (whether using Spark, arc or
anything else) to make sure that you can regenerate the original from the
archive before destroying the original. In the case of Spark, kill the Spark
task and then reopen the archive. If an archive passes the Test option on
the main menu, then it is reasonable to believe it to be allright.
It is possible to unpack a Spark archive containing directories using the old
arc program or to make up a Spark archive containing directories with it.
Decoding uu, atob, CET+ files
=============================
It is possible to use Spark to decode atob files - as used by certain
Viewdata systems. To decode an atob file simply drop it on to the Spark icon
on the icon bar. This will recreate the binary file from the atob file and
then delete the original atob file. If there is an error in the decoding
process, the atob file will not be deleted. atob files are also known as
CET+. If you use CET+ (on SID) to download a file, then it is actually
atob coded. Similarly, uucoded files can be decoded by dropping them on the
Spark icon. Now, uu files often come in several chunks. Spark only expects
the first of these chunks to be dropped on the icon bar, the rest should
exist in the same directory as the first.
Spark$Scrap and Special Features
================================
Spark$Scrap, is a system variable that can be set up in the !Spark.!Run
file, it should point to a directory in a large area of fast temporary disc
storage. It is used for storing temporary files in two situations.
First, when you add files to an archive, a copy of the archive is created.
Normally, this copy is created on the same disc as the original file, but
if Spark$Scrap is set, it will be created where ever this variable points.
The advantages of doing this, are that if the destination archive is on a
floppy, you will be able extend it up to a full 800K instead of being
limited to approximately half that size (see "Snags" below).
Secondly, you may occasionally, load an archive into Spark that only
exists in another program. If Spark$Scrap is set up, the archive will be
recreated on disc using it, so that you can unpack files out of the archive.
Otherwise, such virtual archives will be rejected. When you close the archive,
it will be automatically deleted.
You should set Spark$Scrap, when you install !Spark on your system.
Command Line Operation and Script Files
=======================================
It is possible to use Spark from the operating system command line prompt *.
Typing *!Spark, will print the following screen of help information.
usage:
!spark <options> [command] [archive/<path</file>>]|[command file] <path<.file>>
Command: -a [archive/path] [object] add object to archive
-d [archive/object] delete object from archive
-u [archive/path] [object] update archive
-f [archive/path] [object] freshen archive
-x,-e [archive/object] <path> extract object from archive
-l [archive/object] list contents of archive
-r [file] run command file
-t [archive] test archive
-Q terminate Spark
Options: -b retain backup copy
-c [n] set compress bits
-g [password] garble
-h [password] DES encrypt
-i IBM PC format
-o overwrite files
-q squash
-s store
-v crunch
-y [time] (centisecs.) poll delay (run in background)
-z compress
-B don't keep backup copy
-I Archimedes format
-O don't overwrite files
-Y don't poll
-G,-H clear password
Most of these options and commands have their equivalents on the Spark menus.
Whilst it is nice to be able to use Spark from the command line, the main
use of Spark command lines, is in script files. It is possible to make
a file of type 5F4 which contains Spark command lines. From the desktop,
this will show it's own icon (a double spark). Double clicking on such a
Spark script file, will cause it to be run. Each of the command lines in it
being interpreted in turn. This is useful, because, it allows you to set up
a script file to do some often repeated operation. For example, you may use
Spark to back up your work at the end of each day. Spark script files have
one other important feature when used from the desktop, this is that they
allow archiving to take place in the background, i.e. you may continue to
work with !Edit whilst the archiving actually takes place. It is also possible
to enter command lines from the command window that can be displayed from
the icon bar menu. From inside command files and from the command window,
commands have a cummulative effect. However, each time you run Spark from
the *prompt, the options file will be loaded resetting the options. All
options must precede the single command in each command line. A command
line need not contain a command though.
Command line operation poses one snag, this is that where the desktop always
uses complete file names (including even the filing system name) it is quite
possible to use normal *command paths in command lines (i.e. accepting the
concept of a current directory). This means that Spark cannot tell if two
archives are in fact the same one. So, remeber this and be careful. For
example, if you have an archive open on the desktop, which has the full file
name;
adfs::harddisc.bob.carol.ted.alice.archive
but you use a command line like;
!spark -a archive/ fred
to add something to it, the on screen display will become invalid and any
addtions to it, will lead to corruption.
Before describing the Spark commands, some terminology is necessary.
A path, is a sequence of directory names which ends in a directory name.
An object, is a path with a filename or a directory name added to the end.
A file is just a filename without a path.
An archive, is the adfs path plus filename of an archive file.
The separator used for paths outside archive is '.' but the separator for
paths inside archives is '/'. You can only add things to directories, i.e.
paths.
Wildcard characters are ? (one) and * (0 or more).
Spark commands
==============
a = add objects to archive
This command is used to add objects to an archive. If the archive does not
exist, it is automatically created. An example of this command is:
*!spark -a utils_arc/ util1
This adds the file util1 to the root directory of the archive utils_arc.
Notice that util1 could also be a directory. You can add things to other
directories in the archive by expanding the path inside the archive;
*!spark -a utils_arc/dir1/dir2 util1
u = update objects in archive
This only adds objects to the archive if the versions on disc have a more
recent date stamp, or if they are not already in the archive. For example:
*!spark -u my_arc/ util1
will update files that have been created or changed since they were last
archived.
f = freshen objects in archive
This is like the 'a' command, except that objects are only added if they
already exist in the archive with an earlier date stamp.
d = delete objects from archive
This command allows you to delete objects from an archive. For example:
*!spark -d my_arc/bob
will remove the file bob from the archive file root directory.
x,e = extract objects from archive
These two commands, remove files from an archive and create them in a
usable form on your disc. For example;
*!spark -x my_arc/util1
recreates the file 'util1' from the archive. Notice that 'util1' remains
part of the archive. If you want to extract all the files, simply type:
*!spark -x my_arc
It is also possible to provide a path for the destination of extracted
files.
*!spark -x my_arc $.dump
will put all extracted files in the directory dump on the current drive.
l = listing of objects in archive
This very useful command shows you the contents of an archive along with
much useful information. For example, to see the contents of the archive
called 'my_arc', type:
*!spark -l my_arc
You can, of course, specify individual files or groups of files using
wildcards. For example:
*!spark -l my_arc/pr*
The information displayed gives the original length of the file,
and how long it is in its compressed form. The time and date stamps for
the file and information on which form of data compression has been used
to store the file. You will notice that this is preceded by either 'PC'
or 'ARC', which indicates whether the file is stored in PC or Archimedes
format.
Q = terminate Spark task.
Causes Spark to exit. Typically used as the last line of a script file.
t = test archive integrity
A CRC (Cyclic Redundancy Check) is kept for each file added to the
archive, this allows ARC to tell you if a file has been corrupted. This
can happen when you are transferring files between different computers.
The 't' command unpacks all of the archive entries (without saving them
anywhere), and checks the CRC for each file against the recorded value.
It reports back to you any damage to the archive. For example, to test
that the archive 'my_arc' has been recieved correctly, type:
*!spark -t my_arc
Command Line Options
====================
b = retain backup copy of archive
B = don't retain backup copy of archive
When you add a file to an archive, the original archive is renamed to
B_oldname. Normally, this is deleted after the file has been succesfully
added. By using the 'b' option, you can keep a copy of the original
archive. For example, if you wanted to add the file 'program' to the
archive 'my_arc', but want to keep a backup copy of the archive,
then type:
*!spark -b -a my_arc/ program
The backup archive is called 'b_my_arc'.
c = set number of bits for compression
Allows you to change the number of bits used for compression.
g = Encrypt/decrypt archive entry
G Stop encryption
The 'g' (garble) option allows you to give a password which is used to
encrypt files stored in the archive. The data compression normally
applied will make files unreadable using *TYPE or *DUMP, this lets only
people who know the password extract them from the archive. For example,
if you wish to add 'newfile' to the archive 'my_arc', and encrypt it
using the password 'beebug', type:
*!spark -g beebug -a my_arc/ newfile
When you want to extract the file again, you should type:
*!spark -g beebug -x my_arc/newfile
The password can be any length, and is not case sensitive. You can if
you wish use different passwords for each file in an archive, but we
advise against it. If you should forget or mistype your password, it is
unlikely that you will ever recover the file.
h = Use DES encryption scheme
H = Stop encryption
Similar to g but uses the much better DES scheme.
i = Use IBM PC Archive format
I = Use Archimedes Archive format
When you add a file to an archive, ARC assumes that you want the file to
be stored with its load and exec addresses and attributes. However, if
you want to give an archive to a friend with a PC, you should store the
files in PC format by adding the 'i' option to the command line. For
example, to add a PC file to an archive, type:
*!spark -i -a my_arc/PCprog
The I flag can be used to reverse the effect of -i.
o = overwrite existing files when extracting
O = don't overwrite existing files
When you extract a file, it may be that a file with the same name
already exists. If this option is not set, you will be prompted to overwrite
the file. If you then select N, you will be prompted for permission to rename
the file. If you then select Y, Spark will pick a sensible name, but if you
select N, Spark will continue to the next file to be extracted. The 'o'
option allows you to prevent all prompting, and just overwrite existing
files. For example:
*!spark -o -x my_arc/
q = Use PKARC style squashing
Squashing is a variation on LZW coding used by the fairly popular PC
program PKARC. By adding this option, you make ARC use squashing instead
of crunching. You should consider that squashing will not always be
more efficient than crunching and often will produce only small gains.
However, there are far more copies of ARC than PKARC, and these will not
be able to unpack squashed archives. ARC from version 1.1, can unpack
IBMPC archives made using PKARC and it will do this whether you set the
q flag or not.
s = suppress compression (store only)
This allows you to add files to the archive without compressing them.
v = Use standard crunching
This allows you to use the standard crunching method as used by arc on the PC.
y = Run in background
This flag, tells Spark to call wimp poll every so many centiseconds. By doing
this, Spark can appear to run in the background whilst you do something else
from the desktop. By varying the number of centiseconds, you can control how
much time Spark takes up. Small numbers, will make Spark run slowly but allow
other applications more time (so they work better). Large numbers, will make
Spark run faster, but will interfere more with other programs. A good starting
value, would perhaps be 10. For example;
!spark -y 10 -a new_arc/ c
Notice that background operation, is not possible from the OS * command line
prompt.
z = Use compress
This selects the compress method for compacting files.
Snags
=====
(1) Spark uses the shared C library this is usually contained in the !System
directory which is supplied with all copies of RISC OS and also on the Spark
disk. If for some reason, you execute Spark before opening a viewer on
!System, Spark will complain - 'System resources cannot be found'.
A version of Clib greater than 3.00 is needed. This is supplied on the RISC OS
upgrade disc. I can supply copies in return for a disc and return postage.
(2) Whenever you modify an archive, Spark creates a backup copy in case
anything goes wrong during the archiving process. The problem, is that this
uses up disc space. So for example, you can only create an archive of
approximately 400K on an 800K floppy (see "Spark$Scrap..." above for one
solution).
(3) The current Spark, can only handle 32,000 entries in an archive. This
includes directories as well as files and directories in them etc. So 32,000
total entries, not 32,000 in the root.
(4) The current Spark can only have 8 archives open at a time and a maximum
of 8 viewers.
(5) If you transfer a directory from one archive to another, it will appear
as an archive. Closing the archive and reopening it will make it resume
being a directory.
(6) Directories are stored as non compressed archives within archives. This
means that any such archive you add to an archive will appear as a directory
eventually. Further, to improve performance, the crc's on these sub archives
are not calculated. This is of no importance, your file data is still
protected by individual crc's on each file. However, if you take apart an
archive with directories in it using the old 'arc', some error messages
will result. Ignore them.
Background
==========
An archive is a file in which many smaller files are stored. You may, using
Spark, create archives and add files to them (arc'ing a file) or remove files
(de-arc'ing). One of the features of archives, is that files are stored in a
highly compressed form; thus saving disc space and allowing more rapid
transfer of files by modem. However, probably the most useful feature of an
archive is that like sub-directories in the ADFS, it makes keeping track of
files when transferring them from one machine to another, much simpler.
Archives have a long history going back to UNIX and CP/M. An example of an
archive with no compression is the UNIX shar format. Whilst on CP/M archive
utilities which used data compression include squeeze, LUE and LBR. Perhaps
the most well known archive format and utility was the System Enhancements
Associates (SEA) arc for the IBM PC which was based on many of these earlier
programs. This was transferred to the Atari ST and Amiga micros. In
addition, other more advanced versions of it appeared on the PC like
PKARC by Phil Katz. The equivalent conversion of the arc program to the
Archimedes was released into the public domain by the Archimedes user group
Beebug. Beebug's arc program, was fully compatible with with SEA's arc
program. Using it, you could successfully unpack PC archives on your
Archimedes, as well as create PC format archives. In addition, you could use
a special Archimedes format archive which while not compatible with the PC,
preserves Archimedes file attributes like load and exec addresses. In the
world of RISC OS, Spark is the natural descendent of Beebug arc, it supports
the same format of Archimedes archive as arc, as well as the PC and PKARC
archive formats. However, it has many new features and new more powerful
data compression routines. Other new archive programs have also appeared
on the PC and UNIX systems, these include zip, Phil Katzs' replacement for
PKARC and zoo.
Partly, these new archive programs have been written in an attempt to use
more powerful data compression algorithms. The classical techniques for
data compression, were run length coding and Huffman coding. These do not
given particularly good results. More spectacular results are given by
what is often called LZW coding. A method proposed by Terry Welch based
on work by Lempel and Zev. The implementation on which almost all the rest
are based, was the UNIX file squashing program 'compress'. This just
squashes individual files, although often it is used on 'tar' files. Tar
(tape archive) is a UNIX archive with no compression. At the present time,
16 bit LZW, often gives the best possible data compression. Other newer
techniques can occasionaly beat it by a few percent or may need slghtly
less memory to actually squash the data.
If you dial up your local bulletin board, you will see many arc files (they
are usually identified by the suffix .arc). Using Spark, you will be able to
transfer the files in these to your Archimedes. Obviously, you cannot use
executable PC programs, but there are many text and data files which you may
want to examine (such as documentation, C source files, screen images etc.).
Do not get the impression from the above, that the data compression aspect of
ARC is just a side effect. Frequently, you may achieve a space saving of upto
90%. Just how much space you save, depends on the type of file being ARC'd.
Text files usually compress well. Whilst PC executable files rarely compress
by much, Archimedes executables seem to show good savings in space (often
owing to Acorn's way of handling arrays and because of the high redundancy in
ARM code).
There is a program called bark, which will allow Spark archives to be
unpacked on the BBC micro as long as you only use a subset of the available
features. Copies of bark, and the Beebug arc program are also supplied
on the Spark disc.
Using Messages to drive Spark
=============================
When Spark is first run, it broadcasts a message type 0x41000+(dec)60.
The reason for doing this, is that you can use the message to determine
the task number of Spark so that you can send it messages.
You can send it Spark command lines as the body of a message of type
0x41000+(dec)61. When Spark has finished processing a command, it
will reply with an empty message of type 0x41000+(dec)61. As usual, commands
are displayed in the command window if this is open.
Archive file format
===================
An Archive, is a binary file consisting of archive markers, archive headers
and file data. All archives are preceded by an archive marker. This is a
single byte of value 26.
An archive header, consists of several bytes.
byte 1 Header version number. This tells you how the file data is stored
and how many bytes there are in the header. The header version
numbers for the PC, are detailed below. An Archimedes header
version number is identical to the corresponding PC number except
it has bit 7 set.
bytes 2-15 Filename
bytes 16-19 Compressed file length
bytes 20,21 File date stamp
bytes 22,23 File time stamp
bytes 24,25 CRC for the file
bytes 26-29 If the header type is greater than 1, these hold the original
file length otherwise they are not present.
bytes 30-33 If bit 7 of the header version number is set, these bytes hold
the Archimedes load address for the file otherwise they are not
present.
bytes 34-37 If bit 7 of the header version number is set, these bytes hold
the Archimedes exec address for the file otherwise they are not
present.
bytes 38-41 If bit 7 of the header version number is set, these bytes hold
the Archimedes file attributes otherwise they are not present.
The archive header, is followed by the file data.
The file data is followed by another archive marker
The archive finishes with an archive marker followed by a zero byte.
The time and date fields are always filled in. If the file has a load and exec
address, these are the time and date when the file was added to the archive
otherwise, they are derived from the Archimedes datestamp. In all extract
operations on Archimedes format archives, the contents of the load and exec
fields take precedence.
PC and ARC formats may be mixed in one archive for use on the Archimedes.
PC ARC Header version numbers:
1 = Old style, no compression
2 = New style, no compression
3 = Compression of repeated characters only
4 = Compression of repeated characters plus Huffman Squeezing
5 = Lempel-Zev packing of repeated strings (old style)
6 = Lempel-Zev packing of repeated strings (new style)
7 = Lempel-Zev Welch packing with improved hash function
8 = Dynamic Lempel-Zev packing with adaptive reset
9 = PKARC style squashing
127 = Compression
The time and date stamps are two byte values from which the time in years
etc., can be found as follows;
year = (date >> 9) & 0x7f;
month = (date >> 5) & 0x0f;
day = date & 0x1f;
hour = (time >> 11) & 0x1f;
minute = (time >> 5) & 0x3f;
second = (time & 0x1f) * 2;
Where years are offset from 1980, months begin with 1=January.
Directories are stored as non-compressed archives within archives.
=============================
Release 2.00 (preliminary) November 1989
(c) Copyright David Pilling November 1989.
======
If you have any comments, suggestions, bug reports or complaints or would
like further copies of this disc or details of the many other discs available
for the Archimedes, please write to;
David Pilling
P.O. Box 22,
Thornton Cleveleys,
Blackpool.
FY5 1LR.
United Kingdom.
From time to time enhanced versions of discs will appear. You can upgrade
your copy to the latest one by sending a blank disc with return postage to
the above address.
00000000 2d 3e 21 72 65 61 64 6d 65 0a 20 20 20 20 20 20 |->!readme. | 00000010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000020 20 20 20 20 20 20 20 20 20 20 20 53 70 61 72 6b | Spark| 00000030 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 00000040 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000050 20 20 3d 3d 3d 3d 3d 0a 20 20 20 20 20 20 20 20 | =====. | 00000060 20 20 20 20 20 20 20 20 20 20 20 20 20 28 41 20 | (A | 00000070 53 75 70 65 72 20 41 72 63 68 69 76 65 72 20 66 |Super Archiver f| 00000080 6f 72 20 52 49 53 43 20 4f 53 29 0a 0a 20 20 20 |or RISC OS).. | 00000090 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| * 000000d0 3d 3d 3d 3d 3d 3d 3d 3d 0a 20 20 20 20 20 54 68 |========. Th| 000000e0 69 73 20 64 69 73 63 20 63 6f 6e 74 61 69 6e 73 |is disc contains| 000000f0 20 61 20 70 72 65 6c 69 6d 69 6e 61 72 79 20 76 | a preliminary v| 00000100 65 72 73 69 6f 6e 20 6f 66 20 53 70 61 72 6b 20 |ersion of Spark | 00000110 32 2e 30 30 2e 20 54 68 69 73 20 69 73 20 6e 6f |2.00. This is no| 00000120 74 0a 20 20 20 20 20 74 6f 74 61 6c 6c 79 20 63 |t. totally c| 00000130 6f 6d 70 6c 65 74 65 2e 20 48 6f 77 65 76 65 72 |omplete. However| 00000140 2c 20 49 20 74 68 69 6e 6b 20 74 68 61 74 20 79 |, I think that y| 00000150 6f 75 20 6d 61 79 20 62 65 20 69 6e 74 65 72 65 |ou may be intere| 00000160 73 74 65 64 20 74 6f 20 73 65 65 0a 20 20 20 20 |sted to see. | 00000170 20 77 68 61 74 20 6e 65 77 20 66 65 61 74 75 72 | what new featur| 00000180 65 73 20 61 72 65 20 67 6f 69 6e 67 20 74 6f 20 |es are going to | 00000190 62 65 20 61 76 61 69 6c 61 62 6c 65 20 61 6e 64 |be available and| 000001a0 20 70 65 72 68 61 70 73 20 6d 61 6b 65 20 73 75 | perhaps make su| 000001b0 67 67 65 73 74 69 6f 6e 73 0a 20 20 20 20 20 61 |ggestions. a| 000001c0 73 20 74 6f 20 68 6f 77 20 74 68 69 6e 67 73 20 |s to how things | 000001d0 63 6f 75 6c 64 20 62 65 20 69 6d 70 72 6f 76 65 |could be improve| 000001e0 64 2e 20 49 6e 20 6d 6f 73 74 20 61 73 70 65 63 |d. In most aspec| 000001f0 74 73 2c 20 74 68 65 20 70 72 6f 67 72 61 6d 20 |ts, the program | 00000200 64 6f 65 73 0a 20 20 20 20 20 77 6f 72 6b 20 62 |does. work b| 00000210 75 74 20 64 6f 6e 27 74 20 62 6c 61 6d 65 20 6d |ut don't blame m| 00000220 65 20 69 66 20 6f 63 63 61 73 69 6f 6e 61 6c 6c |e if occasionall| 00000230 79 20 74 68 69 6e 67 73 20 67 6f 20 77 72 6f 6e |y things go wron| 00000240 67 2e 0a 20 20 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |g.. ==========| 00000250 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| * 00000280 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a |==============..| 00000290 0a 0a 49 6e 74 72 6f 64 75 63 74 69 6f 6e 0a 3d |..Introduction.=| 000002a0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 53 70 61 72 |===========.Spar| 000002b0 6b 2c 20 69 73 20 61 20 6d 75 6c 74 69 74 61 73 |k, is a multitas| 000002c0 6b 69 6e 67 20 52 49 53 43 20 4f 53 20 61 72 63 |king RISC OS arc| 000002d0 68 69 76 65 20 70 72 6f 67 72 61 6d 20 66 65 61 |hive program fea| 000002e0 74 75 72 69 6e 67 2c 20 65 61 73 79 20 77 69 6d |turing, easy wim| 000002f0 70 20 64 72 69 76 65 6e 0a 6f 70 65 72 61 74 69 |p driven.operati| 00000300 6f 6e 2c 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e 65 |on, command line| 00000310 20 6f 70 65 72 61 74 69 6f 6e 2c 20 73 63 72 69 | operation, scri| 00000320 70 74 20 66 69 6c 65 73 2c 20 61 72 63 68 69 76 |pt files, archiv| 00000330 69 6e 67 20 6f 66 20 64 69 72 65 63 74 6f 72 69 |ing of directori| 00000340 65 73 2c 0a 62 61 63 6b 67 72 6f 75 6e 64 20 6f |es,.background o| 00000350 70 65 72 61 74 69 6f 6e 2c 20 6d 65 73 73 61 67 |peration, messag| 00000360 65 20 64 72 69 76 65 6e 20 6f 70 65 72 61 74 69 |e driven operati| 00000370 6f 6e 2c 20 44 45 53 20 64 61 74 61 20 65 6e 63 |on, DES data enc| 00000380 72 79 70 74 69 6f 6e 2c 20 62 74 6f 61 20 0a 63 |ryption, btoa .c| 00000390 6f 64 69 6e 67 20 61 6e 64 20 61 74 6f 62 20 64 |oding and atob d| 000003a0 65 63 6f 64 69 6e 67 20 28 43 45 54 2b 20 54 65 |ecoding (CET+ Te| 000003b0 6c 65 73 6f 66 74 77 61 72 65 29 2c 20 75 75 63 |lesoftware), uuc| 000003c0 6f 64 69 6e 67 20 61 6e 64 20 75 75 64 65 63 6f |oding and uudeco| 000003d0 64 69 6e 67 2c 0a 61 6e 64 20 64 69 72 65 63 74 |ding,.and direct| 000003e0 20 52 41 4d 20 74 72 61 6e 73 66 65 72 20 6f 66 | RAM transfer of| 000003f0 20 66 69 6c 65 73 20 74 6f 20 61 6e 64 20 66 72 | files to and fr| 00000400 6f 6d 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 2e |om applications.| 00000410 0a 0a 47 65 74 74 69 6e 67 20 53 74 61 72 74 65 |..Getting Starte| 00000420 64 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |d.==============| 00000430 3d 0a 54 68 69 73 20 64 69 73 63 20 63 6f 6e 74 |=.This disc cont| 00000440 61 69 6e 73 20 61 20 64 69 72 65 63 74 6f 72 79 |ains a directory| 00000450 2f 61 70 70 6c 69 63 61 74 69 6f 6e 20 21 53 70 |/application !Sp| 00000460 61 72 6b 2c 20 6f 70 65 6e 20 61 20 76 69 65 77 |ark, open a view| 00000470 65 72 20 6f 6e 0a 74 68 65 20 64 69 73 6b 2c 20 |er on.the disk, | 00000480 66 72 6f 6d 20 74 68 65 20 64 65 73 6b 74 6f 70 |from the desktop| 00000490 2c 20 61 6e 64 20 64 6f 75 62 6c 65 20 63 6c 69 |, and double cli| 000004a0 63 6b 20 6f 6e 20 74 68 65 20 21 53 70 61 72 6b |ck on the !Spark| 000004b0 20 69 63 6f 6e 2e 20 54 68 69 73 20 77 69 6c 6c | icon. This will| 000004c0 0a 74 68 65 6e 20 61 70 70 65 61 72 20 6f 6e 20 |.then appear on | 000004d0 74 68 65 20 69 63 6f 6e 20 62 61 72 20 61 74 20 |the icon bar at | 000004e0 74 68 65 20 62 6f 74 74 6f 6d 20 6f 66 20 74 68 |the bottom of th| 000004f0 65 20 73 63 72 65 65 6e 2e 20 53 70 61 72 6b 20 |e screen. Spark | 00000500 69 73 20 6e 6f 77 20 72 65 73 69 64 65 6e 74 2c |is now resident,| 00000510 0a 61 6e 64 20 79 6f 75 20 63 61 6e 20 75 73 65 |.and you can use| 00000520 20 69 74 20 6f 6e 20 61 72 63 68 69 76 65 73 2e | it on archives.| 00000530 0a 0a 4f 6e 20 74 68 65 20 41 72 63 68 69 6d 65 |..On the Archime| 00000540 64 65 73 2c 20 61 72 63 68 69 76 65 73 20 68 61 |des, archives ha| 00000550 76 65 20 66 69 6c 65 74 79 70 65 20 44 44 43 2e |ve filetype DDC.| 00000560 20 53 70 61 72 6b 2c 20 77 69 6c 6c 20 6f 6e 6c | Spark, will onl| 00000570 79 20 72 65 63 6f 67 6e 69 73 65 0a 61 72 63 68 |y recognise.arch| 00000580 69 76 65 73 20 69 66 20 74 68 65 79 20 68 61 76 |ives if they hav| 00000590 65 20 74 68 65 20 63 6f 72 72 65 63 74 20 74 79 |e the correct ty| 000005a0 70 65 2e 20 49 66 20 79 6f 75 20 68 61 76 65 20 |pe. If you have | 000005b0 64 6f 77 6e 6c 6f 61 64 65 64 20 61 6e 20 61 72 |downloaded an ar| 000005c0 63 68 69 76 65 2c 0a 74 68 65 6e 20 6d 6f 73 74 |chive,.then most| 000005d0 20 70 72 6f 62 61 62 6c 79 2c 20 69 74 20 77 69 | probably, it wi| 000005e0 6c 6c 20 68 61 76 65 20 74 68 65 20 77 72 6f 6e |ll have the wron| 000005f0 67 20 74 79 70 65 2e 20 42 65 66 6f 72 65 20 75 |g type. 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As with no| 00000790 72 6d 61 6c 20 76 69 65 77 65 72 73 2c 20 66 69 |rmal viewers, fi| 000007a0 6c 65 20 74 79 70 65 73 20 61 72 65 20 73 68 6f |le types are sho| 000007b0 77 6e 20 62 79 20 61 70 70 72 6f 70 72 69 61 74 |wn by appropriat| 000007c0 65 0a 69 63 6f 6e 73 2e 20 44 69 72 65 63 74 6f |e.icons. Directo| 000007d0 72 69 65 73 2c 20 61 72 65 20 73 68 6f 77 6e 20 |ries, are shown | 000007e0 61 73 20 61 20 73 6d 61 6c 6c 20 66 6f 6c 64 65 |as a small folde| 000007f0 72 2e 20 41 20 6e 65 77 20 69 63 6f 6e 2c 20 69 |r. A new icon, i| 00000800 73 20 74 68 65 20 27 49 42 4d 27 20 6f 6e 65 2c |s the 'IBM' one,| 00000810 0a 74 68 69 73 20 64 65 6e 6f 74 65 73 20 61 20 |.this denotes a | 00000820 66 69 6c 65 20 74 68 61 74 20 77 61 73 20 61 72 |file that was ar| 00000830 63 68 69 76 65 64 20 75 73 69 6e 67 20 49 42 4d |chived using IBM| 00000840 20 73 74 79 6c 65 20 61 72 63 68 69 76 69 6e 67 | style archiving| 00000850 2e 20 46 75 72 74 68 65 72 2c 0a 61 72 63 68 69 |. Further,.archi| 00000860 76 65 64 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 |ved applications| 00000870 20 77 69 6c 6c 20 6e 6f 74 20 62 65 20 73 68 6f | will not be sho| 00000880 77 6e 20 77 69 74 68 20 74 68 65 69 72 20 75 73 |wn with their us| 00000890 75 61 6c 20 69 63 6f 6e 2c 20 69 6e 73 74 65 61 |ual icon, instea| 000008a0 64 20 74 68 65 79 0a 77 69 6c 6c 20 61 70 70 65 |d they.will appe| 000008b0 61 72 20 61 73 20 61 20 67 65 6e 65 72 69 63 20 |ar as a generic | 000008c0 61 70 70 6c 69 63 61 74 69 6f 6e 20 64 69 72 65 |application dire| 000008d0 63 74 6f 72 79 2e 20 41 73 20 77 69 74 68 20 6e |ctory. As with n| 000008e0 6f 72 6d 61 6c 20 76 69 65 77 65 72 73 2c 20 79 |ormal viewers, y| 000008f0 6f 75 0a 63 61 6e 20 6d 6f 76 65 20 61 72 6f 75 |ou.can move arou| 00000900 6e 64 20 74 68 65 20 64 69 72 65 63 74 6f 72 69 |nd the directori| 00000910 65 73 20 62 79 20 64 6f 75 62 6c 65 20 63 6c 69 |es by double cli| 00000920 63 6b 69 6e 67 20 61 6e 64 20 63 6c 6f 73 69 6e |cking and closin| 00000930 67 20 76 69 65 77 65 72 73 2e 0a 0a 46 69 6c 65 |g viewers...File| 00000940 73 20 63 61 6e 20 62 65 20 65 78 74 72 61 63 74 |s can be extract| 00000950 65 64 20 66 72 6f 6d 20 74 68 65 20 61 72 63 68 |ed from the arch| 00000960 69 76 65 20 62 79 20 64 72 61 67 67 69 6e 67 20 |ive by dragging | 00000970 74 68 65 6d 20 66 72 6f 6d 20 74 68 65 20 61 72 |them from the ar| 00000980 63 68 69 76 65 0a 77 69 6e 64 6f 77 2c 20 61 6e |chive.window, an| 00000990 64 20 69 6e 74 6f 20 61 20 6e 6f 72 6d 61 6c 20 |d into a normal | 000009a0 64 69 73 63 20 76 69 65 77 65 72 2e 20 53 69 6d |disc viewer. Sim| 000009b0 69 6c 61 72 6c 79 2c 20 66 69 6c 65 73 20 63 61 |ilarly, files ca| 000009c0 6e 20 62 65 20 61 64 64 65 64 20 62 79 0a 64 72 |n be added by.dr| 000009d0 61 67 67 69 6e 67 20 74 68 65 6d 20 66 72 6f 6d |agging them from| 000009e0 20 64 69 73 63 20 61 6e 64 20 69 6e 74 6f 20 74 | disc and into t| 000009f0 68 65 20 41 72 63 68 69 76 65 20 76 69 65 77 65 |he Archive viewe| 00000a00 72 2e 20 59 6f 75 20 63 61 6e 20 6d 61 72 6b 20 |r. You can mark | 00000a10 66 69 6c 65 73 20 75 73 69 6e 67 0a 74 68 65 20 |files using.the | 00000a20 61 64 6a 75 73 74 20 6d 6f 75 73 65 20 62 75 74 |adjust mouse but| 00000a30 74 6f 6e 20 61 73 20 75 73 75 61 6c 2e 20 41 20 |ton as usual. A | 00000a40 64 72 61 67 20 6f 6e 20 6f 6e 65 20 6d 61 72 6b |drag on one mark| 00000a50 65 64 20 66 69 6c 65 20 77 69 6c 6c 20 74 68 65 |ed file will the| 00000a60 6e 20 65 66 66 65 63 74 0a 61 6c 6c 20 6f 66 20 |n effect.all of | 00000a70 74 68 65 6d 2e 0a 0a 53 69 6e 63 65 20 74 79 70 |them...Since typ| 00000a80 69 6e 67 20 27 2a 73 65 74 74 79 70 65 2e 2e 2e |ing '*settype...| 00000a90 27 20 63 61 6e 20 62 65 20 74 65 64 69 6f 75 73 |' can be tedious| 00000aa0 2c 20 69 74 20 69 73 20 70 6f 73 73 69 62 6c 65 |, it is possible| 00000ab0 20 74 6f 20 66 6f 72 63 65 20 53 70 61 72 6b 20 | to force Spark | 00000ac0 74 6f 0a 74 72 65 61 74 20 61 6e 79 20 66 69 6c |to.treat any fil| 00000ad0 65 20 61 73 20 61 6e 20 61 72 63 68 69 76 65 20 |e as an archive | 00000ae0 62 79 20 64 72 61 67 67 69 6e 67 20 69 74 20 6f |by dragging it o| 00000af0 6e 74 6f 20 74 68 65 20 53 70 61 72 6b 20 69 63 |nto the Spark ic| 00000b00 6f 6e 20 6f 6e 20 74 68 65 20 69 63 6f 6e 0a 62 |on on the icon.b| 00000b10 61 72 2e 20 49 66 20 74 68 65 20 66 69 6c 65 20 |ar. If the file | 00000b20 69 73 20 6e 6f 74 20 61 6e 20 61 72 63 68 69 76 |is not an archiv| 00000b30 65 2c 20 74 68 65 6e 20 70 72 6f 62 61 62 6c 79 |e, then probably| 00000b40 20 53 70 61 72 6b 20 77 69 6c 6c 20 63 6f 6d 70 | Spark will comp| 00000b50 6c 61 69 6e 2e 0a 49 66 20 74 68 65 20 66 69 6c |lain..If the fil| 00000b60 65 20 69 73 20 73 75 63 63 65 73 73 66 75 6c 6c |e is successfull| 00000b70 79 20 6c 6f 61 64 65 64 2c 20 74 68 65 6e 20 69 |y loaded, then i| 00000b80 74 73 20 74 79 70 65 20 77 69 6c 6c 20 62 65 20 |ts type will be | 00000b90 73 65 74 20 74 6f 20 44 44 43 2e 20 54 68 69 73 |set to DDC. This| 00000ba0 0a 69 73 20 76 65 72 79 20 68 61 6e 64 79 2c 20 |.is very handy, | 00000bb0 69 66 20 79 6f 75 72 20 63 6f 6d 6d 75 6e 69 63 |if your communic| 00000bc0 61 74 69 6f 6e 73 20 70 72 6f 67 72 61 6d 20 64 |ations program d| 00000bd0 6f 65 73 20 6e 6f 74 20 73 65 74 20 74 68 65 20 |oes not set the | 00000be0 74 79 70 65 73 20 6f 66 0a 66 69 6c 65 73 20 77 |types of.files w| 00000bf0 68 69 63 68 20 79 6f 75 20 64 6f 77 6e 6c 6f 61 |hich you downloa| 00000c00 64 2e 0a 0a 0a 55 73 69 6e 67 20 74 68 65 20 4d |d....Using the M| 00000c10 65 6e 75 73 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |enus.===========| 00000c20 3d 3d 3d 3d 0a 53 70 61 72 6b 20 68 61 73 20 74 |====.Spark has t| 00000c30 77 6f 20 6d 65 6e 75 73 2c 20 62 6f 74 68 20 61 |wo menus, both a| 00000c40 63 63 65 73 73 65 64 20 62 79 20 70 72 65 73 73 |ccessed by press| 00000c50 69 6e 67 20 74 68 65 20 6d 69 64 64 6c 65 20 6d |ing the middle m| 00000c60 6f 75 73 65 20 6d 65 6e 75 20 62 75 74 74 6f 6e |ouse menu button| 00000c70 2e 0a 54 68 65 20 66 69 72 73 74 2c 20 69 73 20 |..The first, is | 00000c80 72 65 76 65 61 6c 65 64 20 62 79 20 63 6c 69 63 |revealed by clic| 00000c90 6b 69 6e 67 20 6f 6e 20 74 68 65 20 53 70 61 72 |king on the Spar| 00000ca0 6b 20 69 63 6f 6e 20 6f 6e 20 74 68 65 20 69 63 |k icon on the ic| 00000cb0 6f 6e 20 62 61 72 2e 20 54 68 69 73 0a 68 61 73 |on bar. This.has| 00000cc0 20 66 6f 75 72 20 6f 70 74 69 6f 6e 73 3b 0a 0a | four options;..| 00000cd0 49 6e 66 6f 0a 3d 3d 3d 3d 0a 4d 6f 76 69 6e 67 |Info.====.Moving| 00000ce0 20 74 68 65 20 6d 6f 75 73 65 20 70 6f 69 6e 74 | the mouse point| 00000cf0 65 72 20 6f 76 65 72 20 74 68 65 20 72 69 67 68 |er over the righ| 00000d00 74 68 61 6e 64 20 61 72 72 6f 77 2c 20 77 69 6c |thand arrow, wil| 00000d10 6c 20 70 6f 70 75 70 20 61 20 64 69 61 6c 6f 67 |l popup a dialog| 00000d20 75 65 20 62 6f 78 2c 0a 63 6f 6e 74 61 69 6e 69 |ue box,.containi| 00000d30 6e 67 20 69 6e 66 6f 72 6d 61 74 69 6f 6e 20 61 |ng information a| 00000d40 62 6f 75 74 20 77 68 69 63 68 20 76 65 72 73 69 |bout which versi| 00000d50 6f 6e 20 6f 66 20 53 70 61 72 6b 20 79 6f 75 20 |on of Spark you | 00000d60 68 61 76 65 2e 20 50 6c 65 61 73 65 20 71 75 6f |have. 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If an| 00001b10 79 0a 65 72 72 6f 72 73 20 61 72 65 20 66 6f 75 |y.errors are fou| 00001b20 6e 64 20 74 68 65 79 20 77 69 6c 6c 20 62 65 20 |nd they will be | 00001b30 72 65 70 6f 72 74 65 64 2e 20 4e 6f 74 69 63 65 |reported. Notice| 00001b40 20 74 68 61 74 20 74 68 69 73 20 61 63 74 75 61 | that this actua| 00001b50 6c 6c 79 20 6d 61 6b 65 73 20 73 75 72 65 0a 74 |lly makes sure.t| 00001b60 68 61 74 20 74 68 65 20 64 61 74 61 20 69 6e 20 |hat the data in | 00001b70 74 68 65 20 61 72 63 68 69 76 65 20 63 61 6e 20 |the archive can | 00001b80 62 65 20 64 65 63 6f 6d 70 72 65 73 73 65 64 20 |be decompressed | 00001b90 73 75 63 63 65 73 73 66 75 6c 6c 79 2e 0a 0a 44 |successfully...D| 00001ba0 45 53 0a 3d 3d 3d 0a 54 68 69 73 20 61 6c 6c 6f |ES.===.This allo| 00001bb0 77 73 20 79 6f 75 20 74 6f 20 73 70 65 63 69 66 |ws you to specif| 00001bc0 79 20 61 20 70 61 73 73 77 6f 72 64 20 74 6f 20 |y a password to | 00001bd0 62 65 20 75 73 65 64 20 74 6f 20 65 6e 63 72 79 |be used to encry| 00001be0 70 74 20 66 69 6c 65 73 20 69 6e 20 74 68 65 20 |pt files in the | 00001bf0 0a 61 72 63 68 69 76 65 2e 20 4e 6f 74 65 20 74 |.archive. Note t| 00001c00 68 61 74 20 69 66 20 79 6f 75 20 65 6e 63 6f 64 |hat if you encod| 00001c10 65 20 79 6f 75 72 20 64 61 74 61 20 69 6e 20 74 |e your data in t| 00001c20 68 69 73 20 77 61 79 2c 20 69 74 20 77 69 6c 6c |his way, it will| 00001c30 20 62 65 20 69 6d 70 6f 73 73 69 62 6c 65 0a 74 | be impossible.t| 00001c40 6f 20 72 65 74 72 69 65 76 65 20 69 74 20 77 69 |o retrieve it wi| 00001c50 74 68 6f 75 74 20 74 68 65 20 6f 72 69 67 69 6e |thout the origin| 00001c60 61 6c 20 70 61 73 73 77 6f 72 64 2e 20 41 74 74 |al password. Att| 00001c70 65 6d 70 74 69 6e 67 20 74 6f 20 75 6e 70 61 63 |empting to unpac| 00001c80 6b 20 61 6e 20 61 72 63 68 69 76 65 0a 77 69 74 |k an archive.wit| 00001c90 68 20 74 68 65 20 77 72 6f 6e 67 20 70 61 73 73 |h the wrong pass| 00001ca0 77 6f 72 64 2c 20 77 69 6c 6c 20 72 65 73 75 6c |word, will resul| 00001cb0 74 20 69 6e 20 61 20 63 6f 72 72 75 70 74 20 66 |t in a corrupt f| 00001cc0 69 6c 65 2e 20 54 68 65 20 44 45 53 20 65 6e 63 |ile. The DES enc| 00001cd0 72 79 70 74 69 6f 6e 0a 73 63 68 65 6d 65 2c 20 |ryption.scheme, | 00001ce0 69 73 20 74 68 61 74 20 64 65 73 69 67 6e 65 64 |is that designed| 00001cf0 20 62 79 20 74 68 65 20 55 53 20 4e 53 41 2c 20 | by the US NSA, | 00001d00 69 74 20 69 73 20 73 75 70 70 6f 73 65 64 20 74 |it is supposed t| 00001d10 6f 20 62 65 20 76 65 72 79 20 64 69 66 66 69 63 |o be very diffic| 00001d20 75 6c 74 0a 74 6f 20 62 72 65 61 6b 2e 0a 0a 47 |ult.to break...G| 00001d30 61 72 62 6c 65 0a 3d 3d 3d 3d 3d 3d 0a 54 68 69 |arble.======.Thi| 00001d40 73 20 69 73 20 61 6e 6f 74 68 65 72 20 66 6f 72 |s is another for| 00001d50 6d 20 6f 66 20 70 61 73 73 77 6f 72 64 20 70 72 |m of password pr| 00001d60 6f 74 65 63 74 69 6f 6e 20 66 6f 72 20 64 61 74 |otection for dat| 00001d70 61 20 69 6e 20 61 72 63 68 69 76 65 73 2e 20 49 |a in archives. I| 00001d80 74 20 69 73 0a 70 72 6f 76 69 64 65 64 20 66 6f |t is.provided fo| 00001d90 72 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 |r compatibility | 00001da0 77 69 74 68 20 65 61 72 6c 69 65 72 20 61 72 63 |with earlier arc| 00001db0 68 69 76 65 20 70 72 6f 67 72 61 6d 73 2e 20 49 |hive programs. I| 00001dc0 6e 20 67 65 6e 65 72 61 6c 2c 20 74 68 69 73 0a |n general, this.| 00001dd0 74 65 63 68 6e 69 71 75 65 20 6f 66 20 65 6e 63 |technique of enc| 00001de0 72 79 70 74 69 6f 6e 20 69 73 20 71 75 69 74 65 |ryption is quite| 00001df0 20 67 6f 6f 64 2e 20 48 6f 77 65 76 65 72 2c 20 | good. However, | 00001e00 75 6e 64 65 72 20 63 65 72 74 61 69 6e 20 63 69 |under certain ci| 00001e10 72 63 75 6d 73 74 61 6e 63 65 73 2c 0a 69 74 20 |rcumstances,.it | 00001e20 69 73 20 65 61 73 79 20 74 6f 20 62 72 65 61 6b |is easy to break| 00001e30 2e 20 54 68 65 72 65 66 6f 72 65 2c 20 44 45 53 |. Therefore, DES| 00001e40 20 69 73 20 74 68 65 20 72 65 63 6f 6d 6d 65 6e | is the recommen| 00001e50 64 65 64 20 6d 65 74 68 6f 64 20 6f 66 20 65 6e |ded method of en| 00001e60 63 72 70 79 74 69 6e 67 0a 61 72 63 68 69 76 65 |crpyting.archive| 00001e70 20 65 6e 74 72 69 65 73 2e 20 4e 6f 74 69 63 65 | entries. Notice| 00001e80 20 74 68 61 74 20 65 76 65 72 79 20 65 6e 74 72 | that every entr| 00001e90 79 20 69 6e 20 61 6e 20 61 72 63 68 69 76 65 20 |y in an archive | 00001ea0 63 61 6e 20 68 61 76 65 20 61 20 64 69 66 66 65 |can have a diffe| 00001eb0 72 65 6e 74 0a 70 61 73 73 77 6f 72 64 20 61 6c |rent.password al| 00001ec0 74 68 6f 75 67 68 20 74 68 69 73 20 69 73 20 6c |though this is l| 00001ed0 69 6b 65 6c 79 20 74 6f 20 70 72 6f 76 65 20 63 |ikely to prove c| 00001ee0 6f 6e 66 75 73 69 6e 67 2e 20 0a 49 66 20 79 6f |onfusing. .If yo| 00001ef0 75 20 74 72 79 20 74 6f 20 75 6e 70 61 63 6b 20 |u try to unpack | 00001f00 61 6e 20 61 72 63 68 69 76 65 20 77 69 74 68 20 |an archive with | 00001f10 74 68 65 20 77 72 6f 6e 67 20 70 61 73 73 77 6f |the wrong passwo| 00001f20 72 64 2c 20 79 6f 75 20 77 69 6c 6c 20 67 65 74 |rd, you will get| 00001f30 20 61 6e 20 65 72 72 6f 72 0a 6d 65 73 73 61 67 | an error.messag| 00001f40 65 20 73 74 61 74 69 6e 67 20 74 68 61 74 20 74 |e stating that t| 00001f50 68 65 20 63 6f 6d 70 72 65 73 73 65 64 20 64 61 |he compressed da| 00001f60 74 61 20 69 73 20 63 6f 72 72 75 70 74 2e 0a 0a |ta is corrupt...| 00001f70 0a 54 68 65 20 4f 70 74 69 6f 6e 73 20 4d 65 6e |.The Options Men| 00001f80 75 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |u.==============| 00001f90 3d 3d 0a 54 68 65 20 66 6f 6c 6c 6f 77 69 6e 67 |==.The following| 00001fa0 20 6f 70 74 69 6f 6e 73 20 61 72 65 20 61 76 61 | options are ava| 00001fb0 69 6c 61 62 6c 65 20 66 72 6f 6d 20 74 68 65 20 |ilable from the | 00001fc0 6f 70 74 69 6f 6e 73 20 73 75 62 6d 65 6e 75 2e |options submenu.| 00001fd0 0a 0a 50 43 20 46 6f 72 6d 61 74 0a 3d 3d 3d 3d |..PC Format.====| 00001fe0 3d 3d 3d 3d 3d 0a 57 68 65 6e 20 74 69 63 6b 65 |=====.When ticke| 00001ff0 64 2c 20 74 68 69 73 20 64 65 6e 6f 74 65 73 20 |d, this denotes | 00002000 74 68 61 74 20 66 69 6c 65 73 20 61 64 64 65 64 |that files added| 00002010 20 74 6f 20 74 68 65 20 61 72 63 68 69 76 65 20 | to the archive | 00002020 77 69 6c 6c 20 62 65 20 61 64 64 65 64 20 69 6e |will be added in| 00002030 0a 50 43 20 61 72 63 68 69 76 65 20 66 6f 72 6d |.PC archive form| 00002040 61 74 2e 0a 0a 43 72 75 6e 63 68 0a 3d 3d 3d 3d |at...Crunch.====| 00002050 3d 3d 0a 57 68 65 6e 20 74 69 63 6b 65 64 2c 20 |==.When ticked, | 00002060 66 69 6c 65 73 20 61 64 64 65 64 20 74 6f 20 74 |files added to t| 00002070 68 65 20 61 72 63 68 69 76 65 20 77 69 6c 6c 20 |he archive will | 00002080 62 65 20 63 6f 6d 70 72 65 73 73 65 64 20 75 73 |be compressed us| 00002090 69 6e 67 20 50 43 20 61 72 63 20 73 74 79 6c 65 |ing PC arc style| 000020a0 0a 63 72 75 6e 63 68 69 6e 67 2e 0a 0a 53 71 75 |.crunching...Squ| 000020b0 61 73 68 0a 3d 3d 3d 3d 3d 3d 0a 57 68 65 6e 20 |ash.======.When | 000020c0 74 69 63 6b 65 64 2c 20 66 69 6c 65 73 20 61 64 |ticked, files ad| 000020d0 64 65 64 20 74 6f 20 74 68 65 20 61 72 63 68 69 |ded to the archi| 000020e0 76 65 20 77 69 6c 6c 20 62 65 20 63 6f 6d 70 72 |ve will be compr| 000020f0 65 73 73 65 64 20 75 73 69 6e 67 20 50 4b 41 52 |essed using PKAR| 00002100 43 20 73 74 79 6c 65 0a 73 71 75 61 73 68 69 6e |C style.squashin| 00002110 67 2e 0a 0a 43 6f 6d 70 72 65 73 73 0a 3d 3d 3d |g...Compress.===| 00002120 3d 3d 3d 3d 3d 0a 57 68 65 6e 20 74 69 63 6b 65 |=====.When ticke| 00002130 64 2c 20 66 69 6c 65 73 20 61 64 64 65 64 20 74 |d, files added t| 00002140 6f 20 74 68 65 20 61 72 63 68 69 76 65 20 77 69 |o the archive wi| 00002150 6c 6c 20 62 65 20 63 6f 6d 70 72 65 73 73 65 64 |ll be compressed| 00002160 2e 20 54 68 65 20 73 75 62 20 6d 65 6e 75 0a 74 |. The sub menu.t| 00002170 6f 20 74 68 65 20 72 69 67 68 74 2c 20 61 6c 6c |o the right, all| 00002180 6f 77 73 20 79 6f 75 20 74 6f 20 73 65 74 20 68 |ows you to set h| 00002190 6f 77 20 6d 61 6e 79 20 62 69 74 73 20 77 69 6c |ow many bits wil| 000021a0 6c 20 62 65 20 75 73 65 64 2e 20 54 68 65 20 6d |l be used. The m| 000021b0 6f 72 65 20 62 69 74 73 0a 61 72 65 20 75 73 65 |ore bits.are use| 000021c0 64 2c 20 74 68 65 20 67 72 65 61 74 65 72 20 74 |d, the greater t| 000021d0 68 65 20 73 61 76 69 6e 67 20 69 6e 20 73 70 61 |he saving in spa| 000021e0 63 65 2e 20 48 6f 77 65 76 65 72 2c 20 6d 6f 72 |ce. However, mor| 000021f0 65 20 6d 65 6d 6f 72 79 20 69 73 20 6e 65 65 64 |e memory is need| 00002200 65 64 0a 74 6f 20 61 63 74 75 61 6c 6c 79 20 64 |ed.to actually d| 00002210 6f 20 74 68 65 20 64 61 74 61 20 63 6f 6d 70 72 |o the data compr| 00002220 65 73 73 69 6f 6e 2e 20 4e 6f 20 65 78 74 72 61 |ession. No extra| 00002230 20 6d 65 6d 6f 72 79 20 69 73 20 6e 65 65 64 65 | memory is neede| 00002240 64 20 74 6f 20 75 6e 63 6f 6d 70 72 65 73 73 0a |d to uncompress.| 00002250 61 20 66 69 6c 65 20 6e 6f 20 6d 61 74 74 65 72 |a file no matter| 00002260 20 68 6f 77 20 6d 61 6e 79 20 62 69 74 73 20 77 | how many bits w| 00002270 65 72 65 20 75 73 65 64 20 69 6e 20 6f 72 69 67 |ere used in orig| 00002280 69 6e 61 6c 6c 79 20 6d 61 6b 69 6e 67 20 69 74 |inally making it| 00002290 2e 20 53 6f 2c 20 69 74 0a 6d 61 79 20 62 65 20 |. So, it.may be | 000022a0 77 6f 72 74 68 77 68 69 6c 65 20 74 6f 20 6d 61 |worthwhile to ma| 000022b0 6b 65 20 6c 6f 74 73 20 6f 66 20 66 72 65 65 20 |ke lots of free | 000022c0 6d 65 6d 6f 72 79 20 61 6e 64 20 75 73 65 20 31 |memory and use 1| 000022d0 36 20 62 69 74 73 20 66 6f 72 20 70 61 63 6b 69 |6 bits for packi| 000022e0 6e 67 0a 74 68 69 6e 67 73 2e 20 43 6f 6d 70 72 |ng.things. Compr| 000022f0 65 73 73 20 69 73 20 6f 6e 6c 79 20 73 75 70 70 |ess is only supp| 00002300 6f 72 74 65 64 20 62 79 20 76 65 72 73 69 6f 6e |orted by version| 00002310 73 20 6f 66 20 53 70 61 72 6b 20 61 66 74 65 72 |s of Spark after| 00002320 20 61 6e 64 20 69 6e 63 6c 75 64 69 6e 67 0a 32 | and including.2| 00002330 2e 30 30 2e 20 31 36 20 62 69 74 20 63 6f 6d 70 |.00. 16 bit comp| 00002340 72 65 73 73 69 6f 6e 2c 20 72 65 71 75 69 72 65 |ression, require| 00002350 73 20 61 72 6f 75 6e 64 20 35 30 30 4b 20 6f 66 |s around 500K of| 00002360 20 66 72 65 65 20 6d 65 6d 6f 72 79 2e 0a 4e 6f | free memory..No| 00002370 74 69 63 65 2c 20 74 68 61 74 20 69 66 20 79 6f |tice, that if yo| 00002380 75 20 75 73 65 20 43 6f 6d 70 72 65 73 73 2c 20 |u use Compress, | 00002390 77 68 6f 65 76 65 72 20 79 6f 75 20 67 69 76 65 |whoever you give| 000023a0 20 74 68 65 20 61 72 63 68 69 76 65 20 74 6f 2c | the archive to,| 000023b0 20 6d 75 73 74 0a 68 61 76 65 20 61 20 76 65 72 | must.have a ver| 000023c0 73 69 6f 6e 20 6f 66 20 53 70 61 72 6b 20 63 61 |sion of Spark ca| 000023d0 70 61 62 6c 65 20 6f 66 20 75 6e 70 61 63 6b 69 |pable of unpacki| 000023e0 6e 67 20 69 74 2e 0a 0a 4e 6f 20 43 6f 6d 70 72 |ng it...No Compr| 000023f0 65 73 73 69 6f 6e 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d |ession.=========| 00002400 3d 3d 3d 3d 3d 0a 46 69 6c 65 73 20 61 64 64 65 |=====.Files adde| 00002410 64 20 74 6f 20 74 68 65 20 61 72 63 68 69 76 65 |d to the archive| 00002420 20 77 69 6c 6c 20 6e 6f 74 20 62 65 20 63 6f 6d | will not be com| 00002430 70 72 65 73 73 65 64 20 77 68 65 6e 20 74 68 69 |pressed when thi| 00002440 73 20 6f 70 74 69 6f 6e 20 69 73 0a 73 65 6c 65 |s option is.sele| 00002450 63 74 65 64 2e 0a 0a 55 70 64 61 74 65 0a 3d 3d |cted...Update.==| 00002460 3d 3d 3d 3d 0a 49 66 20 75 70 64 61 74 65 20 69 |====.If update i| 00002470 73 20 74 69 63 6b 65 64 2c 20 66 69 6c 65 73 20 |s ticked, files | 00002480 77 69 6c 6c 20 6f 6e 6c 79 20 62 65 20 61 64 64 |will only be add| 00002490 65 64 20 74 6f 20 74 68 65 20 61 72 63 68 69 76 |ed to the archiv| 000024a0 65 20 69 66 20 74 68 65 79 20 68 61 76 65 20 6d |e if they have m| 000024b0 6f 72 65 0a 72 65 63 65 6e 74 20 64 61 74 65 73 |ore.recent dates| 000024c0 74 61 6d 70 73 20 74 68 61 6e 20 61 6e 79 20 65 |tamps than any e| 000024d0 78 69 73 74 69 6e 67 20 63 6f 70 79 20 69 6e 20 |xisting copy in | 000024e0 74 68 65 20 61 72 63 68 69 76 65 20 6f 72 20 69 |the archive or i| 000024f0 66 20 74 68 65 79 20 64 6f 20 6e 6f 74 0a 61 6c |f they do not.al| 00002500 72 65 61 64 79 20 65 78 69 73 74 20 69 6e 20 74 |ready exist in t| 00002510 68 65 20 61 72 63 68 69 76 65 2e 0a 0a 46 72 65 |he archive...Fre| 00002520 73 68 65 6e 0a 3d 3d 3d 3d 3d 3d 3d 0a 49 66 20 |shen.=======.If | 00002530 66 72 65 73 68 65 6e 20 69 73 20 74 69 63 6b 65 |freshen is ticke| 00002540 64 2c 20 66 69 6c 65 73 20 77 69 6c 6c 20 6f 6e |d, files will on| 00002550 6c 79 20 62 65 20 61 64 64 65 64 20 74 6f 20 74 |ly be added to t| 00002560 68 65 20 61 72 63 68 69 76 65 20 69 66 20 74 68 |he archive if th| 00002570 65 79 20 68 61 76 65 20 6d 6f 72 65 0a 72 65 63 |ey have more.rec| 00002580 65 6e 74 20 64 61 74 65 73 74 61 6d 70 73 20 74 |ent datestamps t| 00002590 68 61 6e 20 61 6e 79 20 65 78 69 73 74 69 6e 67 |han any existing| 000025a0 20 63 6f 70 79 20 69 6e 20 74 68 65 20 61 72 63 | copy in the arc| 000025b0 68 69 76 65 2e 20 49 66 20 74 68 65 20 66 69 6c |hive. If the fil| 000025c0 65 20 64 6f 65 73 20 6e 6f 74 0a 65 78 69 73 74 |e does not.exist| 000025d0 20 69 6e 20 74 68 65 20 61 72 63 68 69 76 65 2c | in the archive,| 000025e0 20 69 74 20 77 69 6c 6c 20 6e 6f 74 20 62 65 20 | it will not be | 000025f0 61 64 64 65 64 2e 0a 0a 4e 6f 74 65 20 74 68 61 |added...Note tha| 00002600 74 20 46 72 65 73 68 65 6e 20 61 6e 64 20 55 70 |t Freshen and Up| 00002610 64 61 74 65 20 61 72 65 20 6d 75 74 75 61 6c 6c |date are mutuall| 00002620 79 20 65 78 63 6c 75 73 69 76 65 2e 0a 0a 4f 76 |y exclusive...Ov| 00002630 65 72 77 72 69 74 65 0a 3d 3d 3d 3d 3d 3d 3d 3d |erwrite.========| 00002640 3d 0a 49 66 20 6f 76 65 72 77 72 69 74 65 20 69 |=.If overwrite i| 00002650 73 20 73 65 6c 65 63 74 65 64 2c 20 66 69 6c 65 |s selected, file| 00002660 73 20 65 78 74 72 61 63 74 65 64 20 66 72 6f 6d |s extracted from| 00002670 20 74 68 65 20 61 72 63 68 69 76 65 20 77 69 6c | the archive wil| 00002680 6c 20 72 65 70 6c 61 63 65 0a 65 78 69 73 74 69 |l replace.existi| 00002690 6e 67 20 63 6f 70 69 65 73 20 6f 6e 20 64 69 73 |ng copies on dis| 000026a0 63 2e 20 48 6f 77 65 76 65 72 2c 20 69 66 20 6f |c. However, if o| 000026b0 76 65 72 77 72 69 74 65 20 69 73 20 6e 6f 74 20 |verwrite is not | 000026c0 73 65 6c 65 63 74 65 64 2c 20 61 6e 64 20 79 6f |selected, and yo| 000026d0 75 20 61 74 74 65 6d 70 74 0a 74 6f 20 6f 76 65 |u attempt.to ove| 000026e0 72 77 72 69 74 65 20 61 20 66 69 6c 65 2c 20 61 |rwrite a file, a| 000026f0 20 64 69 61 6c 6f 67 75 65 20 62 6f 78 20 77 69 | dialogue box wi| 00002700 6c 6c 20 61 70 70 65 61 72 20 73 65 65 6b 69 6e |ll appear seekin| 00002710 67 20 63 6f 6e 66 69 72 6d 61 74 69 6f 6e 20 61 |g confirmation a| 00002720 6e 64 0a 67 69 76 69 6e 67 20 79 6f 75 20 74 68 |nd.giving you th| 00002730 65 20 6f 70 6f 72 74 75 6e 69 74 79 20 74 6f 20 |e oportunity to | 00002740 72 65 6e 61 6d 65 20 74 68 65 20 66 69 6c 65 2e |rename the file.| 00002750 0a 0a 52 65 74 61 69 6e 20 42 61 63 6b 75 70 0a |..Retain Backup.| 00002760 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 57 68 |=============.Wh| 00002770 65 6e 65 76 65 72 20 61 6e 20 61 72 63 68 69 76 |enever an archiv| 00002780 65 20 69 73 20 6d 6f 64 69 66 69 65 64 2c 20 61 |e is modified, a| 00002790 20 63 6f 70 79 20 77 69 74 68 20 61 20 6e 61 6d | copy with a nam| 000027a0 65 20 6f 66 20 74 68 65 20 66 6f 72 6d 20 62 5f |e of the form b_| 000027b0 61 72 63 68 69 76 65 6e 61 6d 65 0a 69 73 20 63 |archivename.is c| 000027c0 72 65 61 74 65 64 2e 20 41 66 74 65 72 20 61 20 |reated. After a | 000027d0 73 75 63 63 65 73 73 66 75 6c 20 6d 6f 64 69 66 |successful modif| 000027e0 69 63 61 74 69 6f 6e 2c 20 74 68 69 73 20 66 69 |ication, this fi| 000027f0 6c 65 20 69 73 20 6e 6f 72 6d 61 6c 6c 79 20 64 |le is normally d| 00002800 65 6c 65 74 65 64 2e 0a 42 79 20 73 65 6c 65 63 |eleted..By selec| 00002810 74 69 6e 67 20 74 68 69 73 20 6f 70 74 69 6f 6e |ting this option| 00002820 2c 20 79 6f 75 20 63 61 6e 20 6d 61 6b 65 20 53 |, you can make S| 00002830 70 61 72 6b 20 72 65 74 61 69 6e 20 74 68 65 20 |park retain the | 00002840 62 61 63 6b 75 70 20 63 6f 70 79 2e 0a 0a 52 41 |backup copy...RA| 00002850 4d 20 54 72 61 6e 73 66 65 72 0a 3d 3d 3d 3d 3d |M Transfer.=====| 00002860 3d 3d 3d 3d 3d 3d 3d 0a 57 68 65 6e 20 79 6f 75 |=======.When you| 00002870 20 64 72 61 67 20 61 20 66 69 6c 65 20 66 72 6f | drag a file fro| 00002880 6d 20 6f 6e 65 20 61 70 70 6c 69 63 61 74 69 6f |m one applicatio| 00002890 6e 20 74 6f 20 61 6e 6f 74 68 65 72 2c 20 74 68 |n to another, th| 000028a0 65 20 64 61 74 61 20 63 61 6e 20 62 65 0a 74 72 |e data can be.tr| 000028b0 61 6e 73 66 65 72 72 65 64 20 69 6e 20 6f 6e 65 |ansferred in one| 000028c0 20 6f 66 20 74 77 6f 20 77 61 79 73 2e 20 46 69 | of two ways. Fi| 000028d0 72 73 74 2c 20 64 69 72 65 63 74 6c 79 20 69 6e |rst, directly in| 000028e0 20 52 41 4d 2c 20 73 65 63 6f 6e 64 2c 20 74 68 | RAM, second, th| 000028f0 65 20 66 69 72 73 74 0a 61 70 70 6c 69 63 61 74 |e first.applicat| 00002900 69 6f 6e 20 63 61 6e 20 75 73 65 20 74 68 65 20 |ion can use the | 00002910 73 79 73 74 65 6d 20 76 61 72 69 61 62 6c 65 20 |system variable | 00002920 57 69 6d 70 24 53 63 72 61 70 20 74 6f 20 63 72 |Wimp$Scrap to cr| 00002930 65 61 74 65 20 61 20 66 69 6c 65 0a 61 6e 64 20 |eate a file.and | 00002940 70 75 74 20 74 68 65 20 64 61 74 61 20 69 6e 20 |put the data in | 00002950 69 74 2e 20 54 68 65 20 73 65 63 6f 6e 64 20 61 |it. The second a| 00002960 70 70 6c 69 63 61 74 69 6f 6e 20 74 68 65 6e 20 |pplication then | 00002970 6c 6f 61 64 73 20 74 68 65 20 66 69 6c 65 20 61 |loads the file a| 00002980 6e 64 0a 66 69 6e 61 6c 6c 79 2c 20 74 68 65 20 |nd.finally, the | 00002990 66 69 6c 65 20 69 73 20 64 65 6c 65 74 65 64 2e |file is deleted.| 000029a0 20 54 68 65 20 64 69 73 61 64 76 61 6e 74 61 67 | The disadvantag| 000029b0 65 73 20 6f 66 20 57 69 6d 70 24 53 63 72 61 70 |es of Wimp$Scrap| 000029c0 20 61 72 65 0a 74 68 61 74 20 69 74 20 69 73 20 | are.that it is | 000029d0 73 6c 6f 77 2c 20 61 6e 64 20 75 73 65 73 20 76 |slow, and uses v| 000029e0 61 6c 75 61 62 6c 65 20 64 69 73 63 20 73 70 61 |aluable disc spa| 000029f0 63 65 2e 20 46 6f 72 20 74 68 65 73 65 20 72 65 |ce. For these re| 00002a00 61 73 6f 6e 73 2c 20 53 70 61 72 6b 0a 6e 6f 77 |asons, Spark.now| 00002a10 20 75 73 65 73 20 52 41 4d 20 74 72 61 6e 73 66 | uses RAM transf| 00002a20 65 72 2e 20 54 68 65 72 65 20 69 73 20 6f 6e 65 |er. There is one| 00002a30 20 73 6e 61 67 2c 20 69 66 20 52 41 4d 20 74 72 | snag, if RAM tr| 00002a40 61 6e 73 66 65 72 20 69 73 20 75 73 65 64 2c 0a |ansfer is used,.| 00002a50 66 69 6c 65 73 20 63 61 6e 20 6f 6e 6c 79 20 62 |files can only b| 00002a60 65 20 72 65 61 64 20 6f 6e 63 65 2e 20 4e 6f 72 |e read once. Nor| 00002a70 6d 61 6c 6c 79 20 74 68 69 73 20 70 6f 73 65 73 |mally this poses| 00002a80 20 6e 6f 20 70 72 6f 62 6c 65 6d 20 68 6f 77 65 | no problem howe| 00002a90 76 65 72 2c 0a 69 66 20 53 70 61 72 6b 20 66 69 |ver,.if Spark fi| 00002aa0 6e 64 73 20 74 68 61 74 20 69 74 20 63 61 6e 6e |nds that it cann| 00002ab0 6f 74 20 63 6f 6d 70 72 65 73 73 20 61 20 66 69 |ot compress a fi| 00002ac0 6c 65 20 69 74 20 77 69 6c 6c 20 74 72 79 20 74 |le it will try t| 00002ad0 6f 20 6a 75 73 74 20 73 74 6f 72 65 0a 69 74 20 |o just store.it | 00002ae0 61 6e 64 20 74 68 69 73 20 6d 65 61 6e 73 20 72 |and this means r| 00002af0 65 6c 6f 61 64 69 6e 67 20 74 68 65 20 66 69 6c |eloading the fil| 00002b00 65 2e 20 49 66 20 74 68 65 20 66 69 6c 65 20 68 |e. If the file h| 00002b10 61 73 20 63 6f 6d 65 20 76 69 61 20 52 41 4d 20 |as come via RAM | 00002b20 74 68 69 73 0a 63 61 6e 27 74 20 62 65 20 64 6f |this.can't be do| 00002b30 6e 65 2c 20 73 6f 20 53 70 61 72 6b 20 68 61 73 |ne, so Spark has| 00002b40 20 74 6f 20 73 61 76 65 20 74 68 65 20 66 69 6c | to save the fil| 00002b50 65 20 69 6e 20 61 6e 20 65 78 70 61 6e 64 65 64 |e in an expanded| 00002b60 20 73 74 61 74 65 2e 0a 54 6f 20 67 65 74 20 61 | state..To get a| 00002b70 72 6f 75 6e 64 20 74 68 69 73 20 70 72 6f 62 6c |round this probl| 00002b80 65 6d 2c 20 74 68 69 73 20 6d 65 6e 75 20 6f 70 |em, this menu op| 00002b90 74 69 6f 6e 20 61 6c 6c 6f 77 73 20 79 6f 75 20 |tion allows you | 00002ba0 74 6f 20 74 65 6c 6c 20 53 70 61 72 6b 0a 69 66 |to tell Spark.if| 00002bb0 20 69 74 20 73 68 6f 75 6c 64 20 75 73 65 20 52 | it should use R| 00002bc0 41 4d 20 74 72 61 6e 73 66 65 72 20 6f 72 20 57 |AM transfer or W| 00002bd0 69 6d 70 24 53 63 72 61 70 2e 20 45 78 70 65 72 |imp$Scrap. Exper| 00002be0 69 65 6e 63 65 20 73 68 6f 77 73 20 74 68 61 74 |ience shows that| 00002bf0 20 74 68 69 6e 67 73 0a 6c 69 6b 65 20 74 65 78 | things.like tex| 00002c00 74 20 66 69 6c 65 73 20 61 6e 64 20 73 70 72 69 |t files and spri| 00002c10 74 65 73 20 61 6c 6d 6f 73 74 20 61 6c 77 61 79 |tes almost alway| 00002c20 73 20 63 6f 6d 70 72 65 73 73 20 77 65 6c 6c 2e |s compress well.| 00002c30 20 49 74 20 69 73 20 6f 6e 6c 79 20 74 68 69 6e | It is only thin| 00002c40 67 73 0a 6c 69 6b 65 20 66 69 6c 65 73 20 77 68 |gs.like files wh| 00002c50 69 63 68 20 68 61 76 65 20 61 6c 72 65 61 64 79 |ich have already| 00002c60 20 62 65 65 6e 20 63 6f 6d 70 72 65 73 73 65 64 | been compressed| 00002c70 20 69 6e 20 73 6f 6d 65 20 77 61 79 20 6f 72 20 | in some way or | 00002c80 76 65 72 79 20 73 68 6f 72 74 20 66 69 6c 65 73 |very short files| 00002c90 0a 74 68 61 74 20 68 61 76 65 20 74 68 69 73 20 |.that have this | 00002ca0 70 72 6f 62 6c 65 6d 20 6f 66 20 6e 6f 74 20 63 |problem of not c| 00002cb0 6f 6d 70 72 65 73 73 69 6e 67 2e 20 49 6e 20 67 |ompressing. In g| 00002cc0 65 6e 65 72 61 6c 2c 20 6c 65 61 76 65 20 52 41 |eneral, leave RA| 00002cd0 4d 20 54 72 61 6e 73 66 65 72 0a 73 65 6c 65 63 |M Transfer.selec| 00002ce0 74 65 64 20 62 75 74 20 62 65 20 61 77 61 72 65 |ted but be aware| 00002cf0 20 6f 66 20 74 68 65 20 70 6f 73 73 69 62 69 6c | of the possibil| 00002d00 69 74 69 65 73 2e 20 41 74 20 70 72 65 73 65 6e |ities. At presen| 00002d10 74 2c 20 57 69 6d 70 24 53 63 72 61 70 20 69 73 |t, Wimp$Scrap is| 00002d20 0a 61 6c 77 61 79 73 20 75 73 65 64 20 77 68 65 |.always used whe| 00002d30 6e 20 61 20 66 69 6c 65 20 69 73 20 72 75 6e 20 |n a file is run | 00002d40 66 72 6f 6d 20 61 6e 20 61 72 63 68 69 76 65 2e |from an archive.| 00002d50 0a 0a 53 6f 6d 65 20 50 6f 69 6e 74 73 20 41 62 |..Some Points Ab| 00002d60 6f 75 74 20 57 69 6d 70 24 53 63 72 61 70 0a 3d |out Wimp$Scrap.=| 00002d70 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00002d80 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 57 69 6d 70 |===========.Wimp| 00002d90 24 53 63 72 61 70 2c 20 69 73 20 61 20 66 75 6c |$Scrap, is a ful| 00002da0 6c 20 66 69 6c 65 6e 61 6d 65 20 74 68 61 74 20 |l filename that | 00002db0 69 73 20 75 73 65 64 20 66 6f 72 20 74 65 6d 70 |is used for temp| 00002dc0 6f 72 61 72 79 20 66 69 6c 65 73 2e 0a 49 74 20 |orary files..It | 00002dd0 6d 61 6b 65 73 20 73 65 6e 73 65 20 74 6f 20 68 |makes sense to h| 00002de0 61 76 65 20 74 68 69 73 20 70 6f 69 6e 74 69 6e |ave this pointin| 00002df0 67 20 61 74 20 61 20 6c 61 72 67 65 20 61 72 65 |g at a large are| 00002e00 61 20 6f 66 20 68 69 67 68 20 73 70 65 65 64 20 |a of high speed | 00002e10 64 69 73 63 2e 0a 4f 6e 20 61 20 33 31 30 20 77 |disc..On a 310 w| 00002e20 69 74 68 20 68 61 72 64 20 64 69 73 63 2c 20 74 |ith hard disc, t| 00002e30 68 65 20 68 61 72 64 20 64 69 73 63 20 69 73 20 |he hard disc is | 00002e40 74 68 65 20 72 69 67 68 74 20 70 6c 61 63 65 20 |the right place | 00002e50 61 6e 64 20 6f 6e 20 61 20 34 34 30 20 70 65 72 |and on a 440 per| 00002e60 68 61 70 73 0a 74 68 65 20 52 41 4d 20 64 69 73 |haps.the RAM dis| 00002e70 63 20 77 6f 75 6c 64 20 62 65 20 62 65 73 74 2e |c would be best.| 00002e80 20 4f 6e 20 61 20 6d 61 63 68 69 6e 65 20 77 69 | On a machine wi| 00002e90 74 68 20 6c 69 6d 69 74 65 64 20 6d 65 6d 6f 72 |th limited memor| 00002ea0 79 20 61 6e 64 20 6f 6e 6c 79 20 6f 6e 65 0a 66 |y and only one.f| 00002eb0 6c 6f 70 70 79 2c 20 63 61 72 65 20 6d 75 73 74 |loppy, care must| 00002ec0 20 62 65 20 74 61 6b 65 6e 20 6f 72 20 79 6f 75 | be taken or you| 00002ed0 20 77 69 6c 6c 20 65 6e 64 20 75 70 20 64 6f 69 | will end up doi| 00002ee0 6e 67 20 61 20 6c 6f 74 20 6f 66 20 64 69 73 63 |ng a lot of disc| 00002ef0 20 73 77 6f 70 70 69 6e 67 2e 0a 49 66 20 57 69 | swopping..If Wi| 00002f00 6d 70 24 53 63 72 61 70 20 69 73 20 6e 6f 74 20 |mp$Scrap is not | 00002f10 64 65 66 69 6e 65 64 20 61 6e 64 20 79 6f 75 20 |defined and you | 00002f20 6f 70 65 6e 20 61 20 76 69 65 77 65 72 20 6f 6e |open a viewer on| 00002f30 20 21 53 79 73 74 65 6d 2c 20 74 68 65 6e 20 69 | !System, then i| 00002f40 74 0a 77 69 6c 6c 20 62 65 20 64 65 66 69 6e 65 |t.will be define| 00002f50 64 20 74 6f 20 70 6f 69 6e 74 20 69 6e 74 6f 20 |d to point into | 00002f60 74 68 61 74 20 21 53 79 73 74 65 6d 20 64 69 72 |that !System dir| 00002f70 65 63 74 6f 72 79 2e 20 59 6f 75 20 63 61 6e 20 |ectory. You can | 00002f80 66 6f 72 63 65 0a 74 68 65 20 66 69 6c 65 20 74 |force.the file t| 00002f90 6f 20 62 65 20 69 6e 20 61 20 70 61 72 74 69 63 |o be in a partic| 00002fa0 75 6c 61 72 20 21 53 79 73 74 65 6d 20 62 79 20 |ular !System by | 00002fb0 64 6f 75 62 6c 65 20 63 6c 69 63 6b 69 6e 67 20 |double clicking | 00002fc0 6f 6e 20 21 53 79 73 74 65 6d 2e 0a 49 74 20 6d |on !System..It m| 00002fd0 61 79 20 62 65 20 62 65 73 74 20 74 6f 20 63 6f |ay be best to co| 00002fe0 70 79 20 21 53 70 61 72 6b 20 61 6e 64 20 21 53 |py !Spark and !S| 00002ff0 79 73 74 65 6d 20 6f 6e 74 6f 20 74 68 65 20 64 |ystem onto the d| 00003000 69 73 63 20 77 69 74 68 20 74 68 65 20 61 72 63 |isc with the arc| 00003010 68 69 76 65 64 20 64 61 74 61 3b 0a 74 68 65 6e |hived data;.then| 00003020 20 64 6f 75 62 6c 65 20 63 6c 69 63 6b 20 6f 6e | double click on| 00003030 20 21 53 79 73 74 65 6d 20 62 65 66 6f 72 65 20 | !System before | 00003040 73 74 61 72 74 69 6e 67 20 74 6f 20 75 73 65 20 |starting to use | 00003050 53 70 61 72 6b 2e 0a 0a 0a 75 75 63 6f 64 65 20 |Spark....uucode | 00003060 53 70 6c 69 74 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |Split.==========| 00003070 3d 3d 0a 54 68 65 20 6d 65 6e 75 20 74 6f 20 74 |==.The menu to t| 00003080 68 65 20 72 69 67 68 74 20 6f 66 20 74 68 69 73 |he right of this| 00003090 20 6f 70 74 69 6f 6e 2c 20 61 6c 6c 6f 77 73 20 | option, allows | 000030a0 79 6f 75 20 74 79 70 65 20 69 6e 20 74 68 65 20 |you type in the | 000030b0 6d 61 78 69 6d 75 6d 20 6e 75 6d 62 65 72 0a 6f |maximum number.o| 000030c0 66 20 6c 69 6e 65 73 20 79 6f 75 20 77 61 6e 74 |f lines you want| 000030d0 20 74 6f 20 62 65 20 69 6e 20 65 61 63 68 20 73 | to be in each s| 000030e0 75 62 20 66 69 6c 65 20 70 72 6f 64 75 63 65 64 |ub file produced| 000030f0 20 62 79 20 75 75 63 6f 64 69 6e 67 20 61 6e 20 | by uucoding an | 00003100 61 72 63 68 69 76 65 2e 0a 4f 6e 6c 79 20 69 66 |archive..Only if| 00003110 20 74 68 69 73 20 6f 70 74 69 6f 6e 20 69 73 20 | this option is | 00003120 74 69 63 6b 65 64 2c 20 77 69 6c 6c 20 74 68 65 |ticked, will the| 00003130 20 75 75 63 6f 64 65 64 20 66 69 6c 65 20 62 65 | uucoded file be| 00003140 20 73 70 6c 69 74 20 69 6e 74 6f 20 63 68 75 6e | split into chun| 00003150 6b 73 2e 0a 0a 0a 53 61 76 65 20 4f 70 74 69 6f |ks....Save Optio| 00003160 6e 73 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a |ns.============.| 00003170 54 68 69 73 20 61 6c 6c 6f 77 73 20 79 6f 75 20 |This allows you | 00003180 74 6f 20 73 61 76 65 20 74 68 65 20 73 65 74 74 |to save the sett| 00003190 69 6e 67 73 20 6f 66 20 74 68 65 20 61 62 6f 76 |ings of the abov| 000031a0 65 20 6f 70 74 69 6f 6e 73 20 73 6f 20 74 68 61 |e options so tha| 000031b0 74 20 74 68 65 20 6e 65 78 74 20 74 69 6d 65 0a |t the next time.| 000031c0 79 6f 75 20 72 75 6e 20 53 70 61 72 6b 2c 20 74 |you run Spark, t| 000031d0 68 65 79 20 77 69 6c 6c 20 62 65 20 61 75 74 6f |hey will be auto| 000031e0 6d 61 74 69 63 61 6c 6c 79 20 73 65 74 20 75 70 |matically set up| 000031f0 20 66 6f 72 20 79 6f 75 2e 0a 0a 4e 6f 74 65 20 | for you...Note | 00003200 74 68 61 74 20 74 68 65 72 65 20 69 73 20 74 68 |that there is th| 00003210 65 20 70 6f 73 73 69 62 69 6c 69 74 79 20 66 6f |e possibility fo| 00003220 72 20 63 6f 6e 66 75 73 69 6f 6e 20 68 65 72 65 |r confusion here| 00003230 2e 20 49 66 20 79 6f 75 20 73 61 76 65 20 61 20 |. If you save a | 00003240 73 65 74 20 6f 66 0a 6f 70 74 69 6f 6e 73 20 61 |set of.options a| 00003250 6e 64 20 66 6f 72 67 65 74 2c 20 53 70 61 72 6b |nd forget, Spark| 00003260 20 6d 61 79 20 61 70 70 65 61 72 20 74 6f 20 6d | may appear to m| 00003270 69 73 62 65 68 61 76 65 2e 20 46 6f 72 20 65 78 |isbehave. For ex| 00003280 61 6d 70 6c 65 2c 20 69 66 20 75 70 64 61 74 65 |ample, if update| 00003290 20 69 73 0a 73 65 74 2c 20 79 6f 75 20 63 61 6e | is.set, you can| 000032a0 6e 6f 74 20 61 64 64 20 6e 65 77 20 66 69 6c 65 |not add new file| 000032b0 73 20 74 6f 20 61 72 63 68 69 76 65 73 2e 0a 0a |s to archives...| 000032c0 0a 46 75 72 74 68 65 72 20 50 6f 69 6e 74 73 0a |.Further Points.| 000032d0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 44 |==============.D| 000032e0 69 72 65 63 74 6f 72 69 65 73 2c 20 63 61 6e 20 |irectories, can | 000032f0 62 65 20 61 72 63 68 69 76 65 64 20 62 79 20 73 |be archived by s| 00003300 69 6d 70 6c 79 20 64 72 61 67 67 69 6e 67 20 74 |imply dragging t| 00003310 68 65 6d 20 69 6e 74 6f 20 74 68 65 20 61 72 63 |hem into the arc| 00003320 68 69 76 65 20 69 6e 20 74 68 65 0a 75 73 75 61 |hive in the.usua| 00003330 6c 20 77 61 79 2e 0a 0a 59 6f 75 20 63 61 6e 20 |l way...You can | 00003340 74 72 61 6e 73 66 65 72 20 66 69 6c 65 73 20 74 |transfer files t| 00003350 6f 2f 66 72 6f 6d 20 61 70 70 6c 69 63 61 74 69 |o/from applicati| 00003360 6f 6e 73 20 62 79 20 74 68 65 20 75 73 75 61 6c |ons by the usual| 00003370 20 66 69 6c 65 20 69 63 6f 6e 20 64 72 61 67 67 | file icon dragg| 00003380 69 6e 67 0a 74 65 63 68 6e 69 71 75 65 2e 0a 0a |ing.technique...| 00003390 49 74 20 69 73 20 61 6c 73 6f 20 70 6f 73 73 69 |It is also possi| 000033a0 62 6c 65 20 74 6f 20 72 75 6e 20 66 69 6c 65 73 |ble to run files| 000033b0 20 66 72 6f 6d 20 74 68 65 20 61 72 63 68 69 76 | from the archiv| 000033c0 65 20 62 79 20 64 6f 75 62 6c 65 20 63 6c 69 63 |e by double clic| 000033d0 6b 69 6e 67 20 6f 6e 20 74 68 65 6d 2e 0a 54 68 |king on them..Th| 000033e0 69 73 20 63 61 6e 20 62 65 20 71 75 69 74 65 20 |is can be quite | 000033f0 75 73 65 66 75 6c 2c 20 66 6f 72 20 65 78 61 6d |useful, for exam| 00003400 70 6c 65 20 64 6f 75 62 6c 65 20 63 6c 69 63 6b |ple double click| 00003410 69 6e 67 20 6f 6e 20 74 65 78 74 20 66 69 6c 65 |ing on text file| 00003420 73 20 73 68 6f 75 6c 64 0a 65 69 74 68 65 72 20 |s should.either | 00003430 74 79 70 65 20 74 68 65 6d 20 6f 72 20 6c 6f 61 |type them or loa| 00003440 64 20 74 68 65 6d 20 69 6e 74 6f 20 79 6f 75 72 |d them into your| 00003450 20 65 64 69 74 6f 72 2e 20 41 70 70 6c 69 63 61 | editor. Applica| 00003460 74 69 6f 6e 73 20 69 2e 65 2e 20 21 64 69 72 65 |tions i.e. !dire| 00003470 63 74 6f 72 69 65 73 0a 63 61 6e 6e 6f 74 20 62 |ctories.cannot b| 00003480 65 20 72 75 6e 2e 0a 0a 44 6f 6e 27 74 20 62 65 |e run...Don't be| 00003490 20 66 6f 6f 6c 65 64 20 62 79 20 74 68 65 20 61 | fooled by the a| 000034a0 70 70 61 72 65 6e 74 6c 79 20 70 6f 6f 72 20 66 |pparently poor f| 000034b0 69 67 75 72 65 73 20 66 6f 72 20 63 6f 6d 70 72 |igures for compr| 000034c0 65 73 73 69 6e 67 20 64 69 72 65 63 74 6f 72 69 |essing directori| 000034d0 65 73 2e 0a 42 65 63 61 75 73 65 20 64 69 72 65 |es..Because dire| 000034e0 63 74 6f 72 69 65 73 20 61 72 65 20 6e 6f 74 20 |ctories are not | 000034f0 63 6f 6d 70 72 65 73 73 65 64 2c 20 74 68 65 79 |compressed, they| 00003500 20 61 70 70 65 61 72 20 74 6f 20 72 65 64 75 63 | appear to reduc| 00003510 65 20 74 68 65 20 65 66 66 69 63 69 65 6e 63 79 |e the efficiency| 00003520 0a 6f 66 20 53 70 61 72 6b 2e 20 48 6f 77 65 76 |.of Spark. Howev| 00003530 65 72 2c 20 74 68 65 20 66 69 6c 65 73 20 69 6e |er, the files in| 00003540 20 64 69 72 65 63 74 6f 72 69 65 73 20 61 72 65 | directories are| 00003550 20 63 6f 6d 70 72 65 73 73 65 64 20 61 73 20 6d | compressed as m| 00003560 75 63 68 20 61 73 20 70 6f 73 73 69 62 6c 65 2e |uch as possible.| 00003570 0a 49 66 20 79 6f 75 20 77 65 72 65 20 69 6e 76 |.If you were inv| 00003580 65 73 74 69 67 61 74 65 20 74 68 65 20 74 6f 74 |estigate the tot| 00003590 61 6c 20 73 69 7a 65 20 6f 66 20 66 69 6c 65 73 |al size of files| 000035a0 20 69 6e 20 61 20 64 69 72 65 63 74 6f 72 79 2c | in a directory,| 000035b0 20 74 68 69 6e 67 73 20 77 6f 75 6c 64 0a 6c 6f | things would.lo| 000035c0 6f 6b 20 6d 75 63 68 20 62 65 74 74 65 72 2e 0a |ok much better..| 000035d0 0a 49 66 20 79 6f 75 20 69 6e 74 65 6e 64 20 74 |.If you intend t| 000035e0 6f 20 70 75 74 20 69 72 72 65 70 6c 61 63 65 61 |o put irreplacea| 000035f0 62 6c 65 20 6f 72 20 76 61 6c 75 61 62 6c 65 20 |ble or valuable | 00003600 64 61 74 61 20 69 6e 20 61 6e 20 61 72 63 68 69 |data in an archi| 00003610 76 65 20 61 6e 64 0a 74 68 72 6f 77 61 77 61 79 |ve and.throwaway| 00003620 20 74 68 65 20 6f 72 69 67 69 6e 61 6c 2e 20 54 | the original. T| 00003630 68 65 6e 20 69 74 20 69 73 20 61 64 76 69 73 61 |hen it is advisa| 00003640 62 6c 65 20 28 77 68 65 74 68 65 72 20 75 73 69 |ble (whether usi| 00003650 6e 67 20 53 70 61 72 6b 2c 20 61 72 63 20 6f 72 |ng Spark, arc or| 00003660 0a 61 6e 79 74 68 69 6e 67 20 65 6c 73 65 29 20 |.anything else) | 00003670 74 6f 20 6d 61 6b 65 20 73 75 72 65 20 74 68 61 |to make sure tha| 00003680 74 20 79 6f 75 20 63 61 6e 20 72 65 67 65 6e 65 |t you can regene| 00003690 72 61 74 65 20 74 68 65 20 6f 72 69 67 69 6e 61 |rate the origina| 000036a0 6c 20 66 72 6f 6d 20 74 68 65 0a 61 72 63 68 69 |l from the.archi| 000036b0 76 65 20 62 65 66 6f 72 65 20 64 65 73 74 72 6f |ve before destro| 000036c0 79 69 6e 67 20 74 68 65 20 6f 72 69 67 69 6e 61 |ying the origina| 000036d0 6c 2e 20 49 6e 20 74 68 65 20 63 61 73 65 20 6f |l. In the case o| 000036e0 66 20 53 70 61 72 6b 2c 20 6b 69 6c 6c 20 74 68 |f Spark, kill th| 000036f0 65 20 53 70 61 72 6b 0a 74 61 73 6b 20 61 6e 64 |e Spark.task and| 00003700 20 74 68 65 6e 20 72 65 6f 70 65 6e 20 74 68 65 | then reopen the| 00003710 20 61 72 63 68 69 76 65 2e 20 49 66 20 61 6e 20 | archive. If an | 00003720 61 72 63 68 69 76 65 20 70 61 73 73 65 73 20 74 |archive passes t| 00003730 68 65 20 54 65 73 74 20 6f 70 74 69 6f 6e 20 6f |he Test option o| 00003740 6e 0a 74 68 65 20 6d 61 69 6e 20 6d 65 6e 75 2c |n.the main menu,| 00003750 20 74 68 65 6e 20 69 74 20 69 73 20 72 65 61 73 | then it is reas| 00003760 6f 6e 61 62 6c 65 20 74 6f 20 62 65 6c 69 65 76 |onable to believ| 00003770 65 20 69 74 20 74 6f 20 62 65 20 61 6c 6c 72 69 |e it to be allri| 00003780 67 68 74 2e 0a 0a 49 74 20 69 73 20 70 6f 73 73 |ght...It is poss| 00003790 69 62 6c 65 20 74 6f 20 75 6e 70 61 63 6b 20 61 |ible to unpack a| 000037a0 20 53 70 61 72 6b 20 61 72 63 68 69 76 65 20 63 | Spark archive c| 000037b0 6f 6e 74 61 69 6e 69 6e 67 20 64 69 72 65 63 74 |ontaining direct| 000037c0 6f 72 69 65 73 20 75 73 69 6e 67 20 74 68 65 20 |ories using the | 000037d0 6f 6c 64 0a 61 72 63 20 70 72 6f 67 72 61 6d 20 |old.arc program | 000037e0 6f 72 20 74 6f 20 6d 61 6b 65 20 75 70 20 61 20 |or to make up a | 000037f0 53 70 61 72 6b 20 61 72 63 68 69 76 65 20 63 6f |Spark archive co| 00003800 6e 74 61 69 6e 69 6e 67 20 64 69 72 65 63 74 6f |ntaining directo| 00003810 72 69 65 73 20 77 69 74 68 20 69 74 2e 0a 0a 0a |ries with it....| 00003820 44 65 63 6f 64 69 6e 67 20 75 75 2c 20 61 74 6f |Decoding uu, ato| 00003830 62 2c 20 43 45 54 2b 20 66 69 6c 65 73 0a 3d 3d |b, CET+ files.==| 00003840 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00003850 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 49 74 20 69 |===========.It i| 00003860 73 20 70 6f 73 73 69 62 6c 65 20 74 6f 20 75 73 |s possible to us| 00003870 65 20 53 70 61 72 6b 20 74 6f 20 64 65 63 6f 64 |e Spark to decod| 00003880 65 20 61 74 6f 62 20 66 69 6c 65 73 20 2d 20 61 |e atob files - a| 00003890 73 20 75 73 65 64 20 62 79 20 63 65 72 74 61 69 |s used by certai| 000038a0 6e 0a 56 69 65 77 64 61 74 61 20 73 79 73 74 65 |n.Viewdata syste| 000038b0 6d 73 2e 20 54 6f 20 64 65 63 6f 64 65 20 61 6e |ms. To decode an| 000038c0 20 61 74 6f 62 20 66 69 6c 65 20 73 69 6d 70 6c | atob file simpl| 000038d0 79 20 64 72 6f 70 20 69 74 20 6f 6e 20 74 6f 20 |y drop it on to | 000038e0 74 68 65 20 53 70 61 72 6b 20 69 63 6f 6e 0a 6f |the Spark icon.o| 000038f0 6e 20 74 68 65 20 69 63 6f 6e 20 62 61 72 2e 20 |n the icon bar. | 00003900 54 68 69 73 20 77 69 6c 6c 20 72 65 63 72 65 61 |This will recrea| 00003910 74 65 20 74 68 65 20 62 69 6e 61 72 79 20 66 69 |te the binary fi| 00003920 6c 65 20 66 72 6f 6d 20 74 68 65 20 61 74 6f 62 |le from the atob| 00003930 20 66 69 6c 65 20 61 6e 64 0a 74 68 65 6e 20 64 | file and.then d| 00003940 65 6c 65 74 65 20 74 68 65 20 6f 72 69 67 69 6e |elete the origin| 00003950 61 6c 20 61 74 6f 62 20 66 69 6c 65 2e 20 49 66 |al atob file. If| 00003960 20 74 68 65 72 65 20 69 73 20 61 6e 20 65 72 72 | there is an err| 00003970 6f 72 20 69 6e 20 74 68 65 20 64 65 63 6f 64 69 |or in the decodi| 00003980 6e 67 0a 70 72 6f 63 65 73 73 2c 20 74 68 65 20 |ng.process, the | 00003990 61 74 6f 62 20 66 69 6c 65 20 77 69 6c 6c 20 6e |atob file will n| 000039a0 6f 74 20 62 65 20 64 65 6c 65 74 65 64 2e 20 61 |ot be deleted. a| 000039b0 74 6f 62 20 66 69 6c 65 73 20 61 72 65 20 61 6c |tob files are al| 000039c0 73 6f 20 6b 6e 6f 77 6e 20 61 73 0a 43 45 54 2b |so known as.CET+| 000039d0 2e 20 49 66 20 79 6f 75 20 75 73 65 20 43 45 54 |. If you use CET| 000039e0 2b 20 28 6f 6e 20 53 49 44 29 20 74 6f 20 64 6f |+ (on SID) to do| 000039f0 77 6e 6c 6f 61 64 20 61 20 66 69 6c 65 2c 20 74 |wnload a file, t| 00003a00 68 65 6e 20 69 74 20 69 73 20 61 63 74 75 61 6c |hen it is actual| 00003a10 6c 79 0a 61 74 6f 62 20 63 6f 64 65 64 2e 20 53 |ly.atob coded. S| 00003a20 69 6d 69 6c 61 72 6c 79 2c 20 75 75 63 6f 64 65 |imilarly, uucode| 00003a30 64 20 66 69 6c 65 73 20 63 61 6e 20 62 65 20 64 |d files can be d| 00003a40 65 63 6f 64 65 64 20 62 79 20 64 72 6f 70 70 69 |ecoded by droppi| 00003a50 6e 67 20 74 68 65 6d 20 6f 6e 20 74 68 65 0a 53 |ng them on the.S| 00003a60 70 61 72 6b 20 69 63 6f 6e 2e 20 4e 6f 77 2c 20 |park icon. Now, | 00003a70 75 75 20 66 69 6c 65 73 20 6f 66 74 65 6e 20 63 |uu files often c| 00003a80 6f 6d 65 20 69 6e 20 73 65 76 65 72 61 6c 20 63 |ome in several c| 00003a90 68 75 6e 6b 73 2e 20 53 70 61 72 6b 20 6f 6e 6c |hunks. 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If Spark$| 00003e50 53 63 72 61 70 20 69 73 20 73 65 74 20 75 70 2c |Scrap is set up,| 00003e60 20 74 68 65 20 61 72 63 68 69 76 65 20 77 69 6c | the archive wil| 00003e70 6c 20 62 65 0a 72 65 63 72 65 61 74 65 64 20 6f |l be.recreated o| 00003e80 6e 20 64 69 73 63 20 75 73 69 6e 67 20 69 74 2c |n disc using it,| 00003e90 20 73 6f 20 74 68 61 74 20 79 6f 75 20 63 61 6e | so that you can| 00003ea0 20 75 6e 70 61 63 6b 20 66 69 6c 65 73 20 6f 75 | unpack files ou| 00003eb0 74 20 6f 66 20 74 68 65 20 61 72 63 68 69 76 65 |t of the archive| 00003ec0 2e 0a 4f 74 68 65 72 77 69 73 65 2c 20 73 75 63 |..Otherwise, suc| 00003ed0 68 20 76 69 72 74 75 61 6c 20 61 72 63 68 69 76 |h virtual archiv| 00003ee0 65 73 20 77 69 6c 6c 20 62 65 20 72 65 6a 65 63 |es will be rejec| 00003ef0 74 65 64 2e 20 57 68 65 6e 20 79 6f 75 20 63 6c |ted. 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00003fd0 6f 73 73 69 62 6c 65 20 74 6f 20 75 73 65 20 53 |ossible to use S| 00003fe0 70 61 72 6b 20 66 72 6f 6d 20 74 68 65 20 6f 70 |park from the op| 00003ff0 65 72 61 74 69 6e 67 20 73 79 73 74 65 6d 20 63 |erating system c| 00004000 6f 6d 6d 61 6e 64 20 6c 69 6e 65 20 70 72 6f 6d |ommand line prom| 00004010 70 74 20 2a 2e 0a 54 79 70 69 6e 67 20 2a 21 53 |pt *..Typing *!S| 00004020 70 61 72 6b 2c 20 77 69 6c 6c 20 70 72 69 6e 74 |park, will print| 00004030 20 74 68 65 20 66 6f 6c 6c 6f 77 69 6e 67 20 73 | the following s| 00004040 63 72 65 65 6e 20 6f 66 20 68 65 6c 70 20 69 6e |creen of help in| 00004050 66 6f 72 6d 61 74 69 6f 6e 2e 0a 0a 75 73 61 67 |formation...usag| 00004060 65 3a 0a 21 73 70 61 72 6b 20 3c 6f 70 74 69 6f |e:.!spark <optio| 00004070 6e 73 3e 20 5b 63 6f 6d 6d 61 6e 64 5d 20 5b 61 |ns> [command] [a| 00004080 72 63 68 69 76 65 2f 3c 70 61 74 68 3c 2f 66 69 |rchive/<path</fi| 00004090 6c 65 3e 3e 5d 7c 5b 63 6f 6d 6d 61 6e 64 20 66 |le>>]|[command f| 000040a0 69 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[archive/path] | 00004180 5b 6f 62 6a 65 63 74 5d 20 20 20 66 72 65 73 68 |[object] fresh| 00004190 65 6e 20 61 72 63 68 69 76 65 0a 20 20 20 20 20 |en archive. | 000041a0 20 2d 78 2c 2d 65 20 5b 61 72 63 68 69 76 65 2f | -x,-e [archive/| 000041b0 6f 62 6a 65 63 74 5d 20 3c 70 61 74 68 3e 20 20 |object] <path> | 000041c0 20 65 78 74 72 61 63 74 20 6f 62 6a 65 63 74 20 | extract object | 000041d0 66 72 6f 6d 20 61 72 63 68 69 76 65 0a 20 20 20 |from archive. | 000041e0 20 20 20 20 20 20 2d 6c 20 5b 61 72 63 68 69 76 | -l [archiv| 000041f0 65 2f 6f 62 6a 65 63 74 5d 20 20 20 20 20 20 20 |e/object] | 00004200 20 20 20 6c 69 73 74 20 63 6f 6e 74 65 6e 74 73 | list contents| 00004210 20 6f 66 20 61 72 63 68 69 76 65 0a 20 20 20 20 | of archive. | 00004220 20 20 20 20 20 2d 72 20 5b 66 69 6c 65 5d 20 20 | -r [file] | 00004230 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00004240 20 20 72 75 6e 20 63 6f 6d 6d 61 6e 64 20 66 69 | run command fi| 00004250 6c 65 0a 20 20 20 20 20 20 20 20 20 2d 74 20 5b |le. -t [| 00004260 61 72 63 68 69 76 65 5d 20 20 20 20 20 20 20 20 |archive] | 00004270 20 20 20 20 20 20 20 20 20 74 65 73 74 20 61 72 | test ar| 00004280 63 68 69 76 65 0a 20 20 20 20 20 20 20 20 20 2d |chive. -| 00004290 51 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |Q | 000042a0 20 20 20 20 20 20 20 20 20 20 20 20 74 65 72 6d | term| 000042b0 69 6e 61 74 65 20 53 70 61 72 6b 0a 0a 4f 70 74 |inate Spark..Opt| 000042c0 69 6f 6e 73 3a 20 2d 62 20 20 20 20 20 20 20 20 |ions: -b | 000042d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000042e0 20 20 20 72 65 74 61 69 6e 20 62 61 63 6b 75 70 | retain backup| 000042f0 20 63 6f 70 79 0a 20 20 20 20 20 20 20 20 20 2d | copy. -| 00004300 63 20 5b 6e 5d 20 20 20 20 20 20 20 20 20 20 20 |c [n] | 00004310 20 20 20 20 20 20 20 20 20 20 20 20 73 65 74 20 | set | 00004320 63 6f 6d 70 72 65 73 73 20 62 69 74 73 0a 20 20 |compress bits. | 00004330 20 20 20 20 20 20 20 2d 67 20 5b 70 61 73 73 77 | -g [passw| 00004340 6f 72 64 5d 20 20 20 20 20 20 20 20 20 20 20 20 |ord] | 00004350 20 20 20 20 67 61 72 62 6c 65 0a 20 20 20 20 20 | garble. | 00004360 20 20 20 20 2d 68 20 5b 70 61 73 73 77 6f 72 64 | -h [password| 00004370 5d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |] | 00004380 20 44 45 53 20 65 6e 63 72 79 70 74 0a 20 20 20 | DES encrypt. | 00004390 20 20 20 20 20 20 2d 69 20 20 20 20 20 20 20 20 | -i | 000043a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000043b0 20 20 20 49 42 4d 20 50 43 20 66 6f 72 6d 61 74 | IBM PC format| 000043c0 0a 20 20 20 20 20 20 20 20 20 2d 6f 20 20 20 20 |. -o | 000043d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000043e0 20 20 20 20 20 20 20 6f 76 65 72 77 72 69 74 65 | overwrite| 000043f0 20 66 69 6c 65 73 0a 20 20 20 20 20 20 20 20 20 | files. | 00004400 2d 71 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |-q | 00004410 20 20 20 20 20 20 20 20 20 20 20 20 20 73 71 75 | squ| 00004420 61 73 68 0a 20 20 20 20 20 20 20 20 20 2d 73 20 |ash. -s | 00004430 20 20 20 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70 20 62 61 63 6b 75 70 20 63 6f 70 79 0a 20 20 |p backup copy. | 00004530 20 20 20 20 20 20 20 2d 49 20 20 20 20 20 20 20 | -I | 00004540 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00004550 20 20 20 20 41 72 63 68 69 6d 65 64 65 73 20 66 | Archimedes f| 00004560 6f 72 6d 61 74 0a 20 20 20 20 20 20 20 20 20 2d |ormat. -| 00004570 4f 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |O | 00004580 20 20 20 20 20 20 20 20 20 20 20 20 64 6f 6e 27 | don'| 00004590 74 20 6f 76 65 72 77 72 69 74 65 20 66 69 6c 65 |t overwrite file| 000045a0 73 0a 20 20 20 20 20 20 20 20 20 2d 59 20 20 20 |s. -Y | 000045b0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000045c0 20 20 20 20 20 20 20 20 64 6f 6e 27 74 20 70 6f | don't po| 000045d0 6c 6c 0a 20 20 20 20 20 20 2d 47 2c 2d 48 20 20 |ll. -G,-H | 000045e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000045f0 20 20 20 20 20 20 20 20 20 63 6c 65 61 72 20 70 | clear p| 00004600 61 73 73 77 6f 72 64 0a 0a 0a 4d 6f 73 74 20 6f 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It is possible| 000046e0 20 74 6f 20 6d 61 6b 65 0a 61 20 66 69 6c 65 20 | to make.a file | 000046f0 6f 66 20 74 79 70 65 20 35 46 34 20 77 68 69 63 |of type 5F4 whic| 00004700 68 20 63 6f 6e 74 61 69 6e 73 20 53 70 61 72 6b |h contains Spark| 00004710 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e 65 73 2e 20 | command lines. | 00004720 46 72 6f 6d 20 74 68 65 20 64 65 73 6b 74 6f 70 |From the desktop| 00004730 2c 0a 74 68 69 73 20 77 69 6c 6c 20 73 68 6f 77 |,.this will show| 00004740 20 69 74 27 73 20 6f 77 6e 20 69 63 6f 6e 20 28 | it's own icon (| 00004750 61 20 64 6f 75 62 6c 65 20 73 70 61 72 6b 29 2e |a double spark).| 00004760 20 44 6f 75 62 6c 65 20 63 6c 69 63 6b 69 6e 67 | Double clicking| 00004770 20 6f 6e 20 73 75 63 68 20 61 20 0a 53 70 61 72 | on such a .Spar| 00004780 6b 20 73 63 72 69 70 74 20 66 69 6c 65 2c 20 77 |k script file, w| 00004790 69 6c 6c 20 63 61 75 73 65 20 69 74 20 74 6f 20 |ill cause it to | 000047a0 62 65 20 72 75 6e 2e 20 45 61 63 68 20 6f 66 20 |be run. 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For examp| 00004850 6c 65 2c 20 79 6f 75 20 6d 61 79 20 75 73 65 0a |le, you may use.| 00004860 53 70 61 72 6b 20 74 6f 20 62 61 63 6b 20 75 70 |Spark to back up| 00004870 20 79 6f 75 72 20 77 6f 72 6b 20 61 74 20 74 68 | your work at th| 00004880 65 20 65 6e 64 20 6f 66 20 65 61 63 68 20 64 61 |e end of each da| 00004890 79 2e 20 53 70 61 72 6b 20 73 63 72 69 70 74 20 |y. Spark script | 000048a0 66 69 6c 65 73 20 68 61 76 65 0a 6f 6e 65 20 6f |files have.one o| 000048b0 74 68 65 72 20 69 6d 70 6f 72 74 61 6e 74 20 66 |ther important f| 000048c0 65 61 74 75 72 65 20 77 68 65 6e 20 75 73 65 64 |eature when used| 000048d0 20 66 72 6f 6d 20 74 68 65 20 64 65 73 6b 74 6f | from the deskto| 000048e0 70 2c 20 74 68 69 73 20 69 73 20 74 68 61 74 20 |p, this is that | 000048f0 74 68 65 79 0a 61 6c 6c 6f 77 20 61 72 63 68 69 |they.allow archi| 00004900 76 69 6e 67 20 74 6f 20 74 61 6b 65 20 70 6c 61 |ving to take pla| 00004910 63 65 20 69 6e 20 74 68 65 20 62 61 63 6b 67 72 |ce in the backgr| 00004920 6f 75 6e 64 2c 20 69 2e 65 2e 20 79 6f 75 20 6d |ound, i.e. you m| 00004930 61 79 20 63 6f 6e 74 69 6e 75 65 20 74 6f 0a 77 |ay continue to.w| 00004940 6f 72 6b 20 77 69 74 68 20 21 45 64 69 74 20 77 |ork with !Edit w| 00004950 68 69 6c 73 74 20 74 68 65 20 61 72 63 68 69 76 |hilst the archiv| 00004960 69 6e 67 20 61 63 74 75 61 6c 6c 79 20 74 61 6b |ing actually tak| 00004970 65 73 20 70 6c 61 63 65 2e 20 49 74 20 69 73 20 |es place. 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However, e| 00004a50 61 63 68 20 74 69 6d 65 20 79 6f 75 20 72 75 6e |ach time you run| 00004a60 20 53 70 61 72 6b 20 66 72 6f 6d 0a 74 68 65 20 | Spark from.the | 00004a70 2a 70 72 6f 6d 70 74 2c 20 74 68 65 20 6f 70 74 |*prompt, the opt| 00004a80 69 6f 6e 73 20 66 69 6c 65 20 77 69 6c 6c 20 62 |ions file will b| 00004a90 65 20 6c 6f 61 64 65 64 20 72 65 73 65 74 74 69 |e loaded resetti| 00004aa0 6e 67 20 74 68 65 20 6f 70 74 69 6f 6e 73 2e 20 |ng the options. | 00004ab0 41 6c 6c 0a 6f 70 74 69 6f 6e 73 20 6d 75 73 74 |All.options must| 00004ac0 20 70 72 65 63 65 64 65 20 74 68 65 20 73 69 6e | precede the sin| 00004ad0 67 6c 65 20 63 6f 6d 6d 61 6e 64 20 69 6e 20 65 |gle command in e| 00004ae0 61 63 68 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e 65 |ach command line| 00004af0 2e 20 41 20 63 6f 6d 6d 61 6e 64 0a 6c 69 6e 65 |. A command.line| 00004b00 20 6e 65 65 64 20 6e 6f 74 20 63 6f 6e 74 61 69 | need not contai| 00004b10 6e 20 61 20 63 6f 6d 6d 61 6e 64 20 74 68 6f 75 |n a command thou| 00004b20 67 68 2e 0a 0a 43 6f 6d 6d 61 6e 64 20 6c 69 6e |gh...Command lin| 00004b30 65 20 6f 70 65 72 61 74 69 6f 6e 20 70 6f 73 65 |e operation pose| 00004b40 73 20 6f 6e 65 20 73 6e 61 67 2c 20 74 68 69 73 |s one snag, this| 00004b50 20 69 73 20 74 68 61 74 20 77 68 65 72 65 20 74 | is that where t| 00004b60 68 65 20 64 65 73 6b 74 6f 70 20 61 6c 77 61 79 |he desktop alway| 00004b70 73 0a 75 73 65 73 20 63 6f 6d 70 6c 65 74 65 20 |s.uses complete | 00004b80 66 69 6c 65 20 6e 61 6d 65 73 20 28 69 6e 63 6c |file names (incl| 00004b90 75 64 69 6e 67 20 65 76 65 6e 20 74 68 65 20 66 |uding even the f| 00004ba0 69 6c 69 6e 67 20 73 79 73 74 65 6d 20 6e 61 6d |iling system nam| 00004bb0 65 29 20 69 74 20 69 73 20 71 75 69 74 65 0a 70 |e) it is quite.p| 00004bc0 6f 73 73 69 62 6c 65 20 74 6f 20 75 73 65 20 6e |ossible to use n| 00004bd0 6f 72 6d 61 6c 20 2a 63 6f 6d 6d 61 6e 64 20 70 |ormal *command p| 00004be0 61 74 68 73 20 69 6e 20 63 6f 6d 6d 61 6e 64 20 |aths in command | 00004bf0 6c 69 6e 65 73 20 28 69 2e 65 2e 20 61 63 63 65 |lines (i.e. acce| 00004c00 70 74 69 6e 67 20 74 68 65 0a 63 6f 6e 63 65 70 |pting the.concep| 00004c10 74 20 6f 66 20 61 20 63 75 72 72 65 6e 74 20 64 |t of a current d| 00004c20 69 72 65 63 74 6f 72 79 29 2e 20 54 68 69 73 20 |irectory). This | 00004c30 6d 65 61 6e 73 20 74 68 61 74 20 53 70 61 72 6b |means that Spark| 00004c40 20 63 61 6e 6e 6f 74 20 74 65 6c 6c 20 69 66 20 | cannot tell if | 00004c50 74 77 6f 0a 61 72 63 68 69 76 65 73 20 61 72 65 |two.archives are| 00004c60 20 69 6e 20 66 61 63 74 20 74 68 65 20 73 61 6d | in fact the sam| 00004c70 65 20 6f 6e 65 2e 20 53 6f 2c 20 72 65 6d 65 62 |e one. So, remeb| 00004c80 65 72 20 74 68 69 73 20 61 6e 64 20 62 65 20 63 |er this and be c| 00004c90 61 72 65 66 75 6c 2e 20 46 6f 72 0a 65 78 61 6d |areful. For.exam| 00004ca0 70 6c 65 2c 20 69 66 20 79 6f 75 20 68 61 76 65 |ple, if you have| 00004cb0 20 61 6e 20 61 72 63 68 69 76 65 20 6f 70 65 6e | an archive open| 00004cc0 20 6f 6e 20 74 68 65 20 64 65 73 6b 74 6f 70 2c | on the desktop,| 00004cd0 20 77 68 69 63 68 20 68 61 73 20 74 68 65 20 66 | which has the f| 00004ce0 75 6c 6c 20 66 69 6c 65 0a 6e 61 6d 65 3b 0a 20 |ull file.name;. | 00004cf0 20 20 20 20 20 61 64 66 73 3a 3a 68 61 72 64 64 | adfs::hardd| 00004d00 69 73 63 2e 62 6f 62 2e 63 61 72 6f 6c 2e 74 65 |isc.bob.carol.te| 00004d10 64 2e 61 6c 69 63 65 2e 61 72 63 68 69 76 65 0a |d.alice.archive.| 00004d20 62 75 74 20 79 6f 75 20 75 73 65 20 61 20 63 6f |but you use a co| 00004d30 6d 6d 61 6e 64 20 6c 69 6e 65 20 6c 69 6b 65 3b |mmand line like;| 00004d40 0a 20 20 20 20 20 20 21 73 70 61 72 6b 20 2d 61 |. !spark -a| 00004d50 20 61 72 63 68 69 76 65 2f 20 66 72 65 64 0a 74 | archive/ fred.t| 00004d60 6f 20 61 64 64 20 73 6f 6d 65 74 68 69 6e 67 20 |o add something | 00004d70 74 6f 20 69 74 2c 20 74 68 65 20 6f 6e 20 73 63 |to it, the on sc| 00004d80 72 65 65 6e 20 64 69 73 70 6c 61 79 20 77 69 6c |reen display wil| 00004d90 6c 20 62 65 63 6f 6d 65 20 69 6e 76 61 6c 69 64 |l become invalid| 00004da0 20 61 6e 64 20 61 6e 79 0a 61 64 64 74 69 6f 6e | and any.addtion| 00004db0 73 20 74 6f 20 69 74 2c 20 77 69 6c 6c 20 6c 65 |s to it, will le| 00004dc0 61 64 20 74 6f 20 63 6f 72 72 75 70 74 69 6f 6e |ad to corruption| 00004dd0 2e 0a 0a 42 65 66 6f 72 65 20 64 65 73 63 72 69 |...Before descri| 00004de0 62 69 6e 67 20 74 68 65 20 53 70 61 72 6b 20 63 |bing the Spark c| 00004df0 6f 6d 6d 61 6e 64 73 2c 20 73 6f 6d 65 20 74 65 |ommands, some te| 00004e00 72 6d 69 6e 6f 6c 6f 67 79 20 69 73 20 6e 65 63 |rminology is nec| 00004e10 65 73 73 61 72 79 2e 0a 41 20 70 61 74 68 2c 20 |essary..A path, | 00004e20 69 73 20 61 20 73 65 71 75 65 6e 63 65 20 6f 66 |is a sequence of| 00004e30 20 64 69 72 65 63 74 6f 72 79 20 6e 61 6d 65 73 | directory names| 00004e40 20 77 68 69 63 68 20 65 6e 64 73 20 69 6e 20 61 | which ends in a| 00004e50 20 64 69 72 65 63 74 6f 72 79 20 6e 61 6d 65 2e | directory name.| 00004e60 0a 41 6e 20 6f 62 6a 65 63 74 2c 20 69 73 20 61 |.An object, is a| 00004e70 20 70 61 74 68 20 77 69 74 68 20 61 20 66 69 6c | path with a fil| 00004e80 65 6e 61 6d 65 20 6f 72 20 61 20 64 69 72 65 63 |ename or a direc| 00004e90 74 6f 72 79 20 6e 61 6d 65 20 61 64 64 65 64 20 |tory name added | 00004ea0 74 6f 20 74 68 65 20 65 6e 64 2e 0a 41 20 66 69 |to the end..A fi| 00004eb0 6c 65 20 69 73 20 6a 75 73 74 20 61 20 66 69 6c |le is just a fil| 00004ec0 65 6e 61 6d 65 20 77 69 74 68 6f 75 74 20 61 20 |ename without a | 00004ed0 70 61 74 68 2e 0a 41 6e 20 61 72 63 68 69 76 65 |path..An archive| 00004ee0 2c 20 69 73 20 74 68 65 20 61 64 66 73 20 70 61 |, is the adfs pa| 00004ef0 74 68 20 70 6c 75 73 20 66 69 6c 65 6e 61 6d 65 |th plus filename| 00004f00 20 6f 66 20 61 6e 20 61 72 63 68 69 76 65 20 66 | of an archive f| 00004f10 69 6c 65 2e 0a 0a 54 68 65 20 73 65 70 61 72 61 |ile...The separa| 00004f20 74 6f 72 20 75 73 65 64 20 66 6f 72 20 70 61 74 |tor used for pat| 00004f30 68 73 20 6f 75 74 73 69 64 65 20 61 72 63 68 69 |hs outside archi| 00004f40 76 65 20 69 73 20 27 2e 27 20 62 75 74 20 74 68 |ve is '.' but th| 00004f50 65 20 73 65 70 61 72 61 74 6f 72 20 66 6f 72 0a |e separator for.| 00004f60 70 61 74 68 73 20 69 6e 73 69 64 65 20 61 72 63 |paths inside arc| 00004f70 68 69 76 65 73 20 69 73 20 27 2f 27 2e 20 59 6f |hives is '/'. Yo| 00004f80 75 20 63 61 6e 20 6f 6e 6c 79 20 61 64 64 20 74 |u can only add t| 00004f90 68 69 6e 67 73 20 74 6f 20 64 69 72 65 63 74 6f |hings to directo| 00004fa0 72 69 65 73 2c 20 69 2e 65 2e 0a 70 61 74 68 73 |ries, i.e..paths| 00004fb0 2e 0a 0a 57 69 6c 64 63 61 72 64 20 63 68 61 72 |...Wildcard char| 00004fc0 61 63 74 65 72 73 20 61 72 65 20 3f 20 28 6f 6e |acters are ? (on| 00004fd0 65 29 20 61 6e 64 20 2a 20 28 30 20 6f 72 20 6d |e) and * (0 or m| 00004fe0 6f 72 65 29 2e 0a 0a 0a 53 70 61 72 6b 20 63 6f |ore)....Spark co| 00004ff0 6d 6d 61 6e 64 73 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d |mmands.=========| 00005000 3d 3d 3d 3d 3d 0a 0a 61 20 20 20 3d 20 61 64 64 |=====..a = add| 00005010 20 6f 62 6a 65 63 74 73 20 74 6f 20 61 72 63 68 | objects to arch| 00005020 69 76 65 0a 0a 54 68 69 73 20 63 6f 6d 6d 61 6e |ive..This comman| 00005030 64 20 69 73 20 75 73 65 64 20 74 6f 20 61 64 64 |d is used to add| 00005040 20 6f 62 6a 65 63 74 73 20 74 6f 20 61 6e 20 61 | objects to an a| 00005050 72 63 68 69 76 65 2e 20 49 66 20 74 68 65 20 61 |rchive. If the a| 00005060 72 63 68 69 76 65 20 64 6f 65 73 20 6e 6f 74 20 |rchive does not | 00005070 0a 65 78 69 73 74 2c 20 69 74 20 69 73 20 61 75 |.exist, it is au| 00005080 74 6f 6d 61 74 69 63 61 6c 6c 79 20 63 72 65 61 |tomatically crea| 00005090 74 65 64 2e 20 41 6e 20 65 78 61 6d 70 6c 65 20 |ted. An example | 000050a0 6f 66 20 74 68 69 73 20 63 6f 6d 6d 61 6e 64 20 |of this command | 000050b0 69 73 3a 0a 0a 2a 21 73 70 61 72 6b 20 20 2d 61 |is:..*!spark -a| 000050c0 20 75 74 69 6c 73 5f 61 72 63 2f 20 75 74 69 6c | utils_arc/ util| 000050d0 31 0a 0a 54 68 69 73 20 61 64 64 73 20 74 68 65 |1..This adds the| 000050e0 20 66 69 6c 65 20 75 74 69 6c 31 20 74 6f 20 74 | file util1 to t| 000050f0 68 65 20 72 6f 6f 74 20 64 69 72 65 63 74 6f 72 |he root director| 00005100 79 20 6f 66 20 74 68 65 20 61 72 63 68 69 76 65 |y of the archive| 00005110 20 75 74 69 6c 73 5f 61 72 63 2e 20 0a 4e 6f 74 | utils_arc. .Not| 00005120 69 63 65 20 74 68 61 74 20 75 74 69 6c 31 20 63 |ice that util1 c| 00005130 6f 75 6c 64 20 61 6c 73 6f 20 62 65 20 61 20 64 |ould also be a d| 00005140 69 72 65 63 74 6f 72 79 2e 20 59 6f 75 20 63 61 |irectory. You ca| 00005150 6e 20 61 64 64 20 74 68 69 6e 67 73 20 74 6f 20 |n add things to | 00005160 6f 74 68 65 72 0a 64 69 72 65 63 74 6f 72 69 65 |other.directorie| 00005170 73 20 69 6e 20 74 68 65 20 61 72 63 68 69 76 65 |s in the archive| 00005180 20 62 79 20 65 78 70 61 6e 64 69 6e 67 20 74 68 | by expanding th| 00005190 65 20 70 61 74 68 20 69 6e 73 69 64 65 20 74 68 |e path inside th| 000051a0 65 20 61 72 63 68 69 76 65 3b 0a 0a 2a 21 73 70 |e archive;..*!sp| 000051b0 61 72 6b 20 2d 61 20 75 74 69 6c 73 5f 61 72 63 |ark -a utils_arc| 000051c0 2f 64 69 72 31 2f 64 69 72 32 20 75 74 69 6c 31 |/dir1/dir2 util1| 000051d0 0a 0a 0a 75 20 20 20 3d 20 75 70 64 61 74 65 20 |...u = update | 000051e0 6f 62 6a 65 63 74 73 20 69 6e 20 61 72 63 68 69 |objects in archi| 000051f0 76 65 0a 0a 54 68 69 73 20 6f 6e 6c 79 20 61 64 |ve..This only ad| 00005200 64 73 20 6f 62 6a 65 63 74 73 20 74 6f 20 74 68 |ds objects to th| 00005210 65 20 61 72 63 68 69 76 65 20 69 66 20 74 68 65 |e archive if the| 00005220 20 76 65 72 73 69 6f 6e 73 20 6f 6e 20 64 69 73 | versions on dis| 00005230 63 20 68 61 76 65 20 61 20 6d 6f 72 65 20 0a 72 |c have a more .r| 00005240 65 63 65 6e 74 20 64 61 74 65 20 73 74 61 6d 70 |ecent date stamp| 00005250 2c 20 6f 72 20 69 66 20 74 68 65 79 20 61 72 65 |, or if they are| 00005260 20 6e 6f 74 20 61 6c 72 65 61 64 79 20 69 6e 20 | not already in | 00005270 74 68 65 20 61 72 63 68 69 76 65 2e 20 46 6f 72 |the archive. For| 00005280 20 65 78 61 6d 70 6c 65 3a 0a 0a 2a 21 73 70 61 | example:..*!spa| 00005290 72 6b 20 2d 75 20 6d 79 5f 61 72 63 2f 20 75 74 |rk -u my_arc/ ut| 000052a0 69 6c 31 0a 0a 77 69 6c 6c 20 75 70 64 61 74 65 |il1..will update| 000052b0 20 66 69 6c 65 73 20 74 68 61 74 20 68 61 76 65 | files that have| 000052c0 20 62 65 65 6e 20 63 72 65 61 74 65 64 20 6f 72 | been created or| 000052d0 20 63 68 61 6e 67 65 64 20 73 69 6e 63 65 20 74 | changed since t| 000052e0 68 65 79 20 77 65 72 65 20 6c 61 73 74 0a 61 72 |hey were last.ar| 000052f0 63 68 69 76 65 64 2e 0a 0a 0a 66 20 20 20 3d 20 |chived....f = | 00005300 66 72 65 73 68 65 6e 20 6f 62 6a 65 63 74 73 20 |freshen objects | 00005310 69 6e 20 61 72 63 68 69 76 65 0a 0a 54 68 69 73 |in archive..This| 00005320 20 69 73 20 6c 69 6b 65 20 74 68 65 20 27 61 27 | is like the 'a'| 00005330 20 63 6f 6d 6d 61 6e 64 2c 20 65 78 63 65 70 74 | command, except| 00005340 20 74 68 61 74 20 6f 62 6a 65 63 74 73 20 61 72 | that objects ar| 00005350 65 20 6f 6e 6c 79 20 61 64 64 65 64 20 69 66 20 |e only added if | 00005360 74 68 65 79 20 0a 61 6c 72 65 61 64 79 20 65 78 |they .already ex| 00005370 69 73 74 20 69 6e 20 74 68 65 20 61 72 63 68 69 |ist in the archi| 00005380 76 65 20 77 69 74 68 20 61 6e 20 65 61 72 6c 69 |ve with an earli| 00005390 65 72 20 64 61 74 65 20 73 74 61 6d 70 2e 0a 0a |er date stamp...| 000053a0 0a 64 20 20 20 3d 20 64 65 6c 65 74 65 20 6f 62 |.d = delete ob| 000053b0 6a 65 63 74 73 20 66 72 6f 6d 20 61 72 63 68 69 |jects from archi| 000053c0 76 65 0a 0a 54 68 69 73 20 63 6f 6d 6d 61 6e 64 |ve..This command| 000053d0 20 61 6c 6c 6f 77 73 20 79 6f 75 20 74 6f 20 64 | allows you to d| 000053e0 65 6c 65 74 65 20 6f 62 6a 65 63 74 73 20 66 72 |elete objects fr| 000053f0 6f 6d 20 61 6e 20 61 72 63 68 69 76 65 2e 20 46 |om an archive. F| 00005400 6f 72 20 65 78 61 6d 70 6c 65 3a 0a 0a 2a 21 73 |or example:..*!s| 00005410 70 61 72 6b 20 2d 64 20 6d 79 5f 61 72 63 2f 62 |park -d my_arc/b| 00005420 6f 62 0a 0a 77 69 6c 6c 20 72 65 6d 6f 76 65 20 |ob..will remove | 00005430 74 68 65 20 66 69 6c 65 20 62 6f 62 20 66 72 6f |the file bob fro| 00005440 6d 20 74 68 65 20 61 72 63 68 69 76 65 20 66 69 |m the archive fi| 00005450 6c 65 20 72 6f 6f 74 20 64 69 72 65 63 74 6f 72 |le root director| 00005460 79 2e 20 0a 0a 0a 78 2c 65 20 3d 20 65 78 74 72 |y. ...x,e = extr| 00005470 61 63 74 20 6f 62 6a 65 63 74 73 20 66 72 6f 6d |act objects from| 00005480 20 61 72 63 68 69 76 65 0a 0a 54 68 65 73 65 20 | archive..These | 00005490 74 77 6f 20 63 6f 6d 6d 61 6e 64 73 2c 20 72 65 |two commands, re| 000054a0 6d 6f 76 65 20 66 69 6c 65 73 20 66 72 6f 6d 20 |move files from | 000054b0 61 6e 20 61 72 63 68 69 76 65 20 61 6e 64 20 63 |an archive and c| 000054c0 72 65 61 74 65 20 74 68 65 6d 20 69 6e 20 61 20 |reate them in a | 000054d0 0a 75 73 61 62 6c 65 20 66 6f 72 6d 20 6f 6e 20 |.usable form on | 000054e0 79 6f 75 72 20 64 69 73 63 2e 20 46 6f 72 20 65 |your disc. For e| 000054f0 78 61 6d 70 6c 65 3b 0a 0a 2a 21 73 70 61 72 6b |xample;..*!spark| 00005500 20 2d 78 20 6d 79 5f 61 72 63 2f 75 74 69 6c 31 | -x my_arc/util1| 00005510 0a 0a 72 65 63 72 65 61 74 65 73 20 74 68 65 20 |..recreates the | 00005520 66 69 6c 65 20 27 75 74 69 6c 31 27 20 66 72 6f |file 'util1' fro| 00005530 6d 20 74 68 65 20 61 72 63 68 69 76 65 2e 20 4e |m the archive. N| 00005540 6f 74 69 63 65 20 74 68 61 74 20 27 75 74 69 6c |otice that 'util| 00005550 31 27 20 72 65 6d 61 69 6e 73 20 0a 70 61 72 74 |1' remains .part| 00005560 20 6f 66 20 74 68 65 20 61 72 63 68 69 76 65 2e | of the archive.| 00005570 20 49 66 20 79 6f 75 20 77 61 6e 74 20 74 6f 20 | If you want to | 00005580 65 78 74 72 61 63 74 20 61 6c 6c 20 74 68 65 20 |extract all the | 00005590 66 69 6c 65 73 2c 20 73 69 6d 70 6c 79 20 74 79 |files, simply ty| 000055a0 70 65 3a 0a 0a 2a 21 73 70 61 72 6b 20 2d 78 20 |pe:..*!spark -x | 000055b0 6d 79 5f 61 72 63 0a 0a 49 74 20 69 73 20 61 6c |my_arc..It is al| 000055c0 73 6f 20 70 6f 73 73 69 62 6c 65 20 74 6f 20 70 |so possible to p| 000055d0 72 6f 76 69 64 65 20 61 20 70 61 74 68 20 66 6f |rovide a path fo| 000055e0 72 20 74 68 65 20 64 65 73 74 69 6e 61 74 69 6f |r the destinatio| 000055f0 6e 20 6f 66 20 65 78 74 72 61 63 74 65 64 0a 66 |n of extracted.f| 00005600 69 6c 65 73 2e 0a 0a 2a 21 73 70 61 72 6b 20 2d |iles...*!spark -| 00005610 78 20 6d 79 5f 61 72 63 20 24 2e 64 75 6d 70 0a |x my_arc $.dump.| 00005620 0a 77 69 6c 6c 20 70 75 74 20 61 6c 6c 20 65 78 |.will put all ex| 00005630 74 72 61 63 74 65 64 20 66 69 6c 65 73 20 69 6e |tracted files in| 00005640 20 74 68 65 20 64 69 72 65 63 74 6f 72 79 20 64 | the directory d| 00005650 75 6d 70 20 6f 6e 20 74 68 65 20 63 75 72 72 65 |ump on the curre| 00005660 6e 74 20 64 72 69 76 65 2e 0a 0a 0a 6c 20 20 20 |nt drive....l | 00005670 3d 20 6c 69 73 74 69 6e 67 20 6f 66 20 6f 62 6a |= listing of obj| 00005680 65 63 74 73 20 69 6e 20 61 72 63 68 69 76 65 0a |ects in archive.| 00005690 0a 54 68 69 73 20 76 65 72 79 20 75 73 65 66 75 |.This very usefu| 000056a0 6c 20 63 6f 6d 6d 61 6e 64 20 73 68 6f 77 73 20 |l command shows | 000056b0 79 6f 75 20 74 68 65 20 63 6f 6e 74 65 6e 74 73 |you the contents| 000056c0 20 6f 66 20 61 6e 20 61 72 63 68 69 76 65 20 61 | of an archive a| 000056d0 6c 6f 6e 67 20 77 69 74 68 20 0a 6d 75 63 68 20 |long with .much | 000056e0 75 73 65 66 75 6c 20 69 6e 66 6f 72 6d 61 74 69 |useful informati| 000056f0 6f 6e 2e 20 46 6f 72 20 65 78 61 6d 70 6c 65 2c |on. For example,| 00005700 20 74 6f 20 73 65 65 20 74 68 65 20 63 6f 6e 74 | to see the cont| 00005710 65 6e 74 73 20 6f 66 20 74 68 65 20 61 72 63 68 |ents of the arch| 00005720 69 76 65 20 0a 63 61 6c 6c 65 64 20 27 6d 79 5f |ive .called 'my_| 00005730 61 72 63 27 2c 20 74 79 70 65 3a 0a 0a 2a 21 73 |arc', type:..*!s| 00005740 70 61 72 6b 20 2d 6c 20 6d 79 5f 61 72 63 0a 0a |park -l my_arc..| 00005750 59 6f 75 20 63 61 6e 2c 20 6f 66 20 63 6f 75 72 |You can, of cour| 00005760 73 65 2c 20 73 70 65 63 69 66 79 20 69 6e 64 69 |se, specify indi| 00005770 76 69 64 75 61 6c 20 66 69 6c 65 73 20 6f 72 20 |vidual files or | 00005780 67 72 6f 75 70 73 20 6f 66 20 66 69 6c 65 73 20 |groups of files | 00005790 75 73 69 6e 67 20 0a 77 69 6c 64 63 61 72 64 73 |using .wildcards| 000057a0 2e 20 46 6f 72 20 65 78 61 6d 70 6c 65 3a 0a 0a |. For example:..| 000057b0 2a 21 73 70 61 72 6b 20 2d 6c 20 6d 79 5f 61 72 |*!spark -l my_ar| 000057c0 63 2f 70 72 2a 0a 0a 54 68 65 20 69 6e 66 6f 72 |c/pr*..The infor| 000057d0 6d 61 74 69 6f 6e 20 64 69 73 70 6c 61 79 65 64 |mation displayed| 000057e0 20 67 69 76 65 73 20 74 68 65 20 6f 72 69 67 69 | gives the origi| 000057f0 6e 61 6c 20 6c 65 6e 67 74 68 20 6f 66 20 74 68 |nal length of th| 00005800 65 20 66 69 6c 65 2c 20 0a 61 6e 64 20 68 6f 77 |e file, .and how| 00005810 20 6c 6f 6e 67 20 69 74 20 69 73 20 69 6e 20 69 | long it is in i| 00005820 74 73 20 63 6f 6d 70 72 65 73 73 65 64 20 66 6f |ts compressed fo| 00005830 72 6d 2e 20 54 68 65 20 74 69 6d 65 20 61 6e 64 |rm. The time and| 00005840 20 64 61 74 65 20 73 74 61 6d 70 73 20 66 6f 72 | date stamps for| 00005850 20 0a 74 68 65 20 66 69 6c 65 20 61 6e 64 20 69 | .the file and i| 00005860 6e 66 6f 72 6d 61 74 69 6f 6e 20 6f 6e 20 77 68 |nformation on wh| 00005870 69 63 68 20 66 6f 72 6d 20 6f 66 20 64 61 74 61 |ich form of data| 00005880 20 63 6f 6d 70 72 65 73 73 69 6f 6e 20 68 61 73 | compression has| 00005890 20 62 65 65 6e 20 75 73 65 64 20 0a 74 6f 20 73 | been used .to s| 000058a0 74 6f 72 65 20 74 68 65 20 66 69 6c 65 2e 20 59 |tore the file. Y| 000058b0 6f 75 20 77 69 6c 6c 20 6e 6f 74 69 63 65 20 74 |ou will notice t| 000058c0 68 61 74 20 74 68 69 73 20 69 73 20 70 72 65 63 |hat this is prec| 000058d0 65 64 65 64 20 62 79 20 65 69 74 68 65 72 20 27 |eded by either '| 000058e0 50 43 27 20 0a 6f 72 20 27 41 52 43 27 2c 20 77 |PC' .or 'ARC', w| 000058f0 68 69 63 68 20 69 6e 64 69 63 61 74 65 73 20 77 |hich indicates w| 00005900 68 65 74 68 65 72 20 74 68 65 20 66 69 6c 65 20 |hether the file | 00005910 69 73 20 73 74 6f 72 65 64 20 69 6e 20 50 43 20 |is stored in PC | 00005920 6f 72 20 41 72 63 68 69 6d 65 64 65 73 20 0a 66 |or Archimedes .f| 00005930 6f 72 6d 61 74 2e 20 0a 0a 0a 51 20 20 20 3d 20 |ormat. ...Q = | 00005940 74 65 72 6d 69 6e 61 74 65 20 53 70 61 72 6b 20 |terminate Spark | 00005950 74 61 73 6b 2e 0a 0a 43 61 75 73 65 73 20 53 70 |task...Causes Sp| 00005960 61 72 6b 20 74 6f 20 65 78 69 74 2e 20 54 79 70 |ark to exit. Typ| 00005970 69 63 61 6c 6c 79 20 75 73 65 64 20 61 73 20 74 |ically used as t| 00005980 68 65 20 6c 61 73 74 20 6c 69 6e 65 20 6f 66 20 |he last line of | 00005990 61 20 73 63 72 69 70 74 20 66 69 6c 65 2e 0a 0a |a script file...| 000059a0 0a 74 20 20 20 3d 20 74 65 73 74 20 61 72 63 68 |.t = test arch| 000059b0 69 76 65 20 69 6e 74 65 67 72 69 74 79 0a 0a 41 |ive integrity..A| 000059c0 20 43 52 43 20 28 43 79 63 6c 69 63 20 52 65 64 | CRC (Cyclic Red| 000059d0 75 6e 64 61 6e 63 79 20 43 68 65 63 6b 29 20 69 |undancy Check) i| 000059e0 73 20 6b 65 70 74 20 66 6f 72 20 65 61 63 68 20 |s kept for each | 000059f0 66 69 6c 65 20 61 64 64 65 64 20 74 6f 20 74 68 |file added to th| 00005a00 65 20 0a 61 72 63 68 69 76 65 2c 20 74 68 69 73 |e .archive, this| 00005a10 20 61 6c 6c 6f 77 73 20 41 52 43 20 74 6f 20 74 | allows ARC to t| 00005a20 65 6c 6c 20 79 6f 75 20 69 66 20 61 20 66 69 6c |ell you if a fil| 00005a30 65 20 68 61 73 20 62 65 65 6e 20 63 6f 72 72 75 |e has been corru| 00005a40 70 74 65 64 2e 20 54 68 69 73 20 0a 63 61 6e 20 |pted. This .can | 00005a50 68 61 70 70 65 6e 20 77 68 65 6e 20 79 6f 75 20 |happen when you | 00005a60 61 72 65 20 74 72 61 6e 73 66 65 72 72 69 6e 67 |are transferring| 00005a70 20 66 69 6c 65 73 20 62 65 74 77 65 65 6e 20 64 | files between d| 00005a80 69 66 66 65 72 65 6e 74 20 63 6f 6d 70 75 74 65 |ifferent compute| 00005a90 72 73 2e 20 0a 54 68 65 20 27 74 27 20 63 6f 6d |rs. .The 't' com| 00005aa0 6d 61 6e 64 20 75 6e 70 61 63 6b 73 20 61 6c 6c |mand unpacks all| 00005ab0 20 6f 66 20 74 68 65 20 61 72 63 68 69 76 65 20 | of the archive | 00005ac0 65 6e 74 72 69 65 73 20 28 77 69 74 68 6f 75 74 |entries (without| 00005ad0 20 73 61 76 69 6e 67 20 74 68 65 6d 20 0a 61 6e | saving them .an| 00005ae0 79 77 68 65 72 65 29 2c 20 61 6e 64 20 63 68 65 |ywhere), and che| 00005af0 63 6b 73 20 74 68 65 20 43 52 43 20 66 6f 72 20 |cks the CRC for | 00005b00 65 61 63 68 20 66 69 6c 65 20 61 67 61 69 6e 73 |each file agains| 00005b10 74 20 74 68 65 20 72 65 63 6f 72 64 65 64 20 76 |t the recorded v| 00005b20 61 6c 75 65 2e 20 0a 49 74 20 72 65 70 6f 72 74 |alue. .It report| 00005b30 73 20 62 61 63 6b 20 74 6f 20 79 6f 75 20 61 6e |s back to you an| 00005b40 79 20 64 61 6d 61 67 65 20 74 6f 20 74 68 65 20 |y damage to the | 00005b50 61 72 63 68 69 76 65 2e 20 46 6f 72 20 65 78 61 |archive. For exa| 00005b60 6d 70 6c 65 2c 20 74 6f 20 74 65 73 74 20 0a 74 |mple, to test .t| 00005b70 68 61 74 20 74 68 65 20 61 72 63 68 69 76 65 20 |hat the archive | 00005b80 27 6d 79 5f 61 72 63 27 20 68 61 73 20 62 65 65 |'my_arc' has bee| 00005b90 6e 20 72 65 63 69 65 76 65 64 20 63 6f 72 72 65 |n recieved corre| 00005ba0 63 74 6c 79 2c 20 74 79 70 65 3a 0a 0a 2a 21 73 |ctly, type:..*!s| 00005bb0 70 61 72 6b 20 2d 74 20 6d 79 5f 61 72 63 0a 0a |park -t my_arc..| 00005bc0 0a 43 6f 6d 6d 61 6e 64 20 4c 69 6e 65 20 4f 70 |.Command Line Op| 00005bd0 74 69 6f 6e 73 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |tions.==========| 00005be0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 62 20 20 20 |==========..b | 00005bf0 3d 20 72 65 74 61 69 6e 20 62 61 63 6b 75 70 20 |= retain backup | 00005c00 63 6f 70 79 20 6f 66 20 61 72 63 68 69 76 65 0a |copy of archive.| 00005c10 42 20 20 20 3d 20 64 6f 6e 27 74 20 72 65 74 61 |B = don't reta| 00005c20 69 6e 20 62 61 63 6b 75 70 20 63 6f 70 79 20 6f |in backup copy o| 00005c30 66 20 61 72 63 68 69 76 65 0a 0a 57 68 65 6e 20 |f archive..When | 00005c40 79 6f 75 20 61 64 64 20 61 20 66 69 6c 65 20 74 |you add a file t| 00005c50 6f 20 61 6e 20 61 72 63 68 69 76 65 2c 20 74 68 |o an archive, th| 00005c60 65 20 6f 72 69 67 69 6e 61 6c 20 61 72 63 68 69 |e original archi| 00005c70 76 65 20 69 73 20 72 65 6e 61 6d 65 64 20 74 6f |ve is renamed to| 00005c80 20 0a 42 5f 6f 6c 64 6e 61 6d 65 2e 20 4e 6f 72 | .B_oldname. Nor| 00005c90 6d 61 6c 6c 79 2c 20 74 68 69 73 20 69 73 20 64 |mally, this is d| 00005ca0 65 6c 65 74 65 64 20 61 66 74 65 72 20 74 68 65 |eleted after the| 00005cb0 20 66 69 6c 65 20 68 61 73 20 62 65 65 6e 20 73 | file has been s| 00005cc0 75 63 63 65 73 66 75 6c 6c 79 20 0a 61 64 64 65 |uccesfully .adde| 00005cd0 64 2e 20 42 79 20 75 73 69 6e 67 20 74 68 65 20 |d. By using the | 00005ce0 27 62 27 20 6f 70 74 69 6f 6e 2c 20 79 6f 75 20 |'b' option, you | 00005cf0 63 61 6e 20 6b 65 65 70 20 61 20 63 6f 70 79 20 |can keep a copy | 00005d00 6f 66 20 74 68 65 20 6f 72 69 67 69 6e 61 6c 20 |of the original | 00005d10 0a 61 72 63 68 69 76 65 2e 20 46 6f 72 20 65 78 |.archive. For ex| 00005d20 61 6d 70 6c 65 2c 20 69 66 20 79 6f 75 20 77 61 |ample, if you wa| 00005d30 6e 74 65 64 20 74 6f 20 61 64 64 20 74 68 65 20 |nted to add the | 00005d40 66 69 6c 65 20 27 70 72 6f 67 72 61 6d 27 20 74 |file 'program' t| 00005d50 6f 20 74 68 65 0a 61 72 63 68 69 76 65 20 27 6d |o the.archive 'm| 00005d60 79 5f 61 72 63 27 2c 20 62 75 74 20 77 61 6e 74 |y_arc', but want| 00005d70 20 74 6f 20 6b 65 65 70 20 61 20 62 61 63 6b 75 | to keep a backu| 00005d80 70 20 63 6f 70 79 20 6f 66 20 74 68 65 20 61 72 |p copy of the ar| 00005d90 63 68 69 76 65 2c 20 0a 74 68 65 6e 20 74 79 70 |chive, .then typ| 00005da0 65 3a 0a 0a 2a 21 73 70 61 72 6b 20 2d 62 20 2d |e:..*!spark -b -| 00005db0 61 20 6d 79 5f 61 72 63 2f 20 70 72 6f 67 72 61 |a my_arc/ progra| 00005dc0 6d 0a 0a 54 68 65 20 62 61 63 6b 75 70 20 61 72 |m..The backup ar| 00005dd0 63 68 69 76 65 20 69 73 20 63 61 6c 6c 65 64 20 |chive is called | 00005de0 27 62 5f 6d 79 5f 61 72 63 27 2e 0a 0a 0a 63 20 |'b_my_arc'....c | 00005df0 20 20 3d 20 73 65 74 20 6e 75 6d 62 65 72 20 6f | = set number o| 00005e00 66 20 62 69 74 73 20 66 6f 72 20 63 6f 6d 70 72 |f bits for compr| 00005e10 65 73 73 69 6f 6e 0a 0a 41 6c 6c 6f 77 73 20 79 |ession..Allows y| 00005e20 6f 75 20 74 6f 20 63 68 61 6e 67 65 20 74 68 65 |ou to change the| 00005e30 20 6e 75 6d 62 65 72 20 6f 66 20 62 69 74 73 20 | number of bits | 00005e40 75 73 65 64 20 66 6f 72 20 63 6f 6d 70 72 65 73 |used for compres| 00005e50 73 69 6f 6e 2e 0a 0a 0a 67 20 20 20 3d 20 45 6e |sion....g = En| 00005e60 63 72 79 70 74 2f 64 65 63 72 79 70 74 20 61 72 |crypt/decrypt ar| 00005e70 63 68 69 76 65 20 65 6e 74 72 79 0a 47 20 20 20 |chive entry.G | 00005e80 20 20 53 74 6f 70 20 65 6e 63 72 79 70 74 69 6f | Stop encryptio| 00005e90 6e 0a 0a 54 68 65 20 27 67 27 20 28 67 61 72 62 |n..The 'g' (garb| 00005ea0 6c 65 29 20 6f 70 74 69 6f 6e 20 61 6c 6c 6f 77 |le) option allow| 00005eb0 73 20 79 6f 75 20 74 6f 20 67 69 76 65 20 61 20 |s you to give a | 00005ec0 70 61 73 73 77 6f 72 64 20 77 68 69 63 68 20 69 |password which i| 00005ed0 73 20 75 73 65 64 20 74 6f 20 0a 65 6e 63 72 79 |s used to .encry| 00005ee0 70 74 20 66 69 6c 65 73 20 73 74 6f 72 65 64 20 |pt files stored | 00005ef0 69 6e 20 74 68 65 20 61 72 63 68 69 76 65 2e 20 |in the archive. | 00005f00 54 68 65 20 64 61 74 61 20 63 6f 6d 70 72 65 73 |The data compres| 00005f10 73 69 6f 6e 20 6e 6f 72 6d 61 6c 6c 79 20 0a 61 |sion normally .a| 00005f20 70 70 6c 69 65 64 20 77 69 6c 6c 20 6d 61 6b 65 |pplied will make| 00005f30 20 66 69 6c 65 73 20 75 6e 72 65 61 64 61 62 6c | files unreadabl| 00005f40 65 20 75 73 69 6e 67 20 2a 54 59 50 45 20 6f 72 |e using *TYPE or| 00005f50 20 2a 44 55 4d 50 2c 20 74 68 69 73 20 6c 65 74 | *DUMP, this let| 00005f60 73 20 6f 6e 6c 79 20 0a 70 65 6f 70 6c 65 20 77 |s only .people w| 00005f70 68 6f 20 6b 6e 6f 77 20 74 68 65 20 70 61 73 73 |ho know the pass| 00005f80 77 6f 72 64 20 65 78 74 72 61 63 74 20 74 68 65 |word extract the| 00005f90 6d 20 66 72 6f 6d 20 74 68 65 20 61 72 63 68 69 |m from the archi| 00005fa0 76 65 2e 20 46 6f 72 20 65 78 61 6d 70 6c 65 2c |ve. For example,| 00005fb0 20 0a 69 66 20 79 6f 75 20 77 69 73 68 20 74 6f | .if you wish to| 00005fc0 20 61 64 64 20 27 6e 65 77 66 69 6c 65 27 20 74 | add 'newfile' t| 00005fd0 6f 20 74 68 65 20 61 72 63 68 69 76 65 20 27 6d |o the archive 'm| 00005fe0 79 5f 61 72 63 27 2c 20 61 6e 64 20 65 6e 63 72 |y_arc', and encr| 00005ff0 79 70 74 20 69 74 20 0a 75 73 69 6e 67 20 74 68 |ypt it .using th| 00006000 65 20 70 61 73 73 77 6f 72 64 20 27 62 65 65 62 |e password 'beeb| 00006010 75 67 27 2c 20 74 79 70 65 3a 0a 0a 2a 21 73 70 |ug', type:..*!sp| 00006020 61 72 6b 20 2d 67 20 62 65 65 62 75 67 20 2d 61 |ark -g beebug -a| 00006030 20 6d 79 5f 61 72 63 2f 20 6e 65 77 66 69 6c 65 | my_arc/ newfile| 00006040 0a 0a 57 68 65 6e 20 79 6f 75 20 77 61 6e 74 20 |..When you want | 00006050 74 6f 20 65 78 74 72 61 63 74 20 74 68 65 20 66 |to extract the f| 00006060 69 6c 65 20 61 67 61 69 6e 2c 20 79 6f 75 20 73 |ile again, you s| 00006070 68 6f 75 6c 64 20 74 79 70 65 3a 0a 0a 2a 21 73 |hould type:..*!s| 00006080 70 61 72 6b 20 2d 67 20 62 65 65 62 75 67 20 2d |park -g beebug -| 00006090 78 20 6d 79 5f 61 72 63 2f 6e 65 77 66 69 6c 65 |x my_arc/newfile| 000060a0 0a 0a 54 68 65 20 70 61 73 73 77 6f 72 64 20 63 |..The password c| 000060b0 61 6e 20 62 65 20 61 6e 79 20 6c 65 6e 67 74 68 |an be any length| 000060c0 2c 20 61 6e 64 20 69 73 20 6e 6f 74 20 63 61 73 |, and is not cas| 000060d0 65 20 73 65 6e 73 69 74 69 76 65 2e 20 59 6f 75 |e sensitive. You| 000060e0 20 63 61 6e 20 69 66 20 0a 79 6f 75 20 77 69 73 | can if .you wis| 000060f0 68 20 75 73 65 20 64 69 66 66 65 72 65 6e 74 20 |h use different | 00006100 70 61 73 73 77 6f 72 64 73 20 66 6f 72 20 65 61 |passwords for ea| 00006110 63 68 20 66 69 6c 65 20 69 6e 20 61 6e 20 61 72 |ch file in an ar| 00006120 63 68 69 76 65 2c 20 62 75 74 20 77 65 20 0a 61 |chive, but we .a| 00006130 64 76 69 73 65 20 61 67 61 69 6e 73 74 20 69 74 |dvise against it| 00006140 2e 20 49 66 20 79 6f 75 20 73 68 6f 75 6c 64 20 |. If you should | 00006150 66 6f 72 67 65 74 20 6f 72 20 6d 69 73 74 79 70 |forget or mistyp| 00006160 65 20 79 6f 75 72 20 70 61 73 73 77 6f 72 64 2c |e your password,| 00006170 20 69 74 20 69 73 20 0a 75 6e 6c 69 6b 65 6c 79 | it is .unlikely| 00006180 20 74 68 61 74 20 79 6f 75 20 77 69 6c 6c 20 65 | that you will e| 00006190 76 65 72 20 72 65 63 6f 76 65 72 20 74 68 65 20 |ver recover the | 000061a0 66 69 6c 65 2e 0a 0a 68 20 20 20 3d 20 55 73 65 |file...h = Use| 000061b0 20 44 45 53 20 65 6e 63 72 79 70 74 69 6f 6e 20 | DES encryption | 000061c0 73 63 68 65 6d 65 0a 48 20 20 20 3d 20 53 74 6f |scheme.H = Sto| 000061d0 70 20 65 6e 63 72 79 70 74 69 6f 6e 0a 0a 53 69 |p encryption..Si| 000061e0 6d 69 6c 61 72 20 74 6f 20 67 20 62 75 74 20 75 |milar to g but u| 000061f0 73 65 73 20 74 68 65 20 6d 75 63 68 20 62 65 74 |ses the much bet| 00006200 74 65 72 20 44 45 53 20 73 63 68 65 6d 65 2e 0a |ter DES scheme..| 00006210 0a 0a 69 20 20 20 3d 20 55 73 65 20 49 42 4d 20 |..i = Use IBM | 00006220 50 43 20 41 72 63 68 69 76 65 20 66 6f 72 6d 61 |PC Archive forma| 00006230 74 0a 49 20 20 20 3d 20 55 73 65 20 41 72 63 68 |t.I = Use Arch| 00006240 69 6d 65 64 65 73 20 41 72 63 68 69 76 65 20 66 |imedes Archive f| 00006250 6f 72 6d 61 74 0a 0a 57 68 65 6e 20 79 6f 75 20 |ormat..When you | 00006260 61 64 64 20 61 20 66 69 6c 65 20 74 6f 20 61 6e |add a file to an| 00006270 20 61 72 63 68 69 76 65 2c 20 41 52 43 20 61 73 | archive, ARC as| 00006280 73 75 6d 65 73 20 74 68 61 74 20 79 6f 75 20 77 |sumes that you w| 00006290 61 6e 74 20 74 68 65 20 66 69 6c 65 20 74 6f 20 |ant the file to | 000062a0 0a 62 65 20 73 74 6f 72 65 64 20 77 69 74 68 20 |.be stored with | 000062b0 69 74 73 20 6c 6f 61 64 20 61 6e 64 20 65 78 65 |its load and exe| 000062c0 63 20 61 64 64 72 65 73 73 65 73 20 61 6e 64 20 |c addresses and | 000062d0 61 74 74 72 69 62 75 74 65 73 2e 20 48 6f 77 65 |attributes. Howe| 000062e0 76 65 72 2c 20 69 66 20 0a 79 6f 75 20 77 61 6e |ver, if .you wan| 000062f0 74 20 74 6f 20 67 69 76 65 20 61 6e 20 61 72 63 |t to give an arc| 00006300 68 69 76 65 20 74 6f 20 61 20 66 72 69 65 6e 64 |hive to a friend| 00006310 20 77 69 74 68 20 61 20 50 43 2c 20 79 6f 75 20 | with a PC, you | 00006320 73 68 6f 75 6c 64 20 73 74 6f 72 65 20 74 68 65 |should store the| 00006330 20 0a 66 69 6c 65 73 20 69 6e 20 50 43 20 66 6f | .files in PC fo| 00006340 72 6d 61 74 20 62 79 20 61 64 64 69 6e 67 20 74 |rmat by adding t| 00006350 68 65 20 27 69 27 20 6f 70 74 69 6f 6e 20 74 6f |he 'i' option to| 00006360 20 74 68 65 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e | the command lin| 00006370 65 2e 20 46 6f 72 20 0a 65 78 61 6d 70 6c 65 2c |e. For .example,| 00006380 20 74 6f 20 61 64 64 20 61 20 50 43 20 66 69 6c | to add a PC fil| 00006390 65 20 74 6f 20 61 6e 20 61 72 63 68 69 76 65 2c |e to an archive,| 000063a0 20 74 79 70 65 3a 0a 0a 2a 21 73 70 61 72 6b 20 | type:..*!spark | 000063b0 2d 69 20 2d 61 20 6d 79 5f 61 72 63 2f 50 43 70 |-i -a my_arc/PCp| 000063c0 72 6f 67 0a 0a 54 68 65 20 49 20 66 6c 61 67 20 |rog..The I flag | 000063d0 63 61 6e 20 62 65 20 75 73 65 64 20 74 6f 20 72 |can be used to r| 000063e0 65 76 65 72 73 65 20 74 68 65 20 65 66 66 65 63 |everse the effec| 000063f0 74 20 6f 66 20 2d 69 2e 0a 0a 0a 6f 20 20 20 3d |t of -i....o =| 00006400 20 6f 76 65 72 77 72 69 74 65 20 65 78 69 73 74 | overwrite exist| 00006410 69 6e 67 20 66 69 6c 65 73 20 77 68 65 6e 20 65 |ing files when e| 00006420 78 74 72 61 63 74 69 6e 67 0a 4f 20 20 20 3d 20 |xtracting.O = | 00006430 64 6f 6e 27 74 20 6f 76 65 72 77 72 69 74 65 20 |don't overwrite | 00006440 65 78 69 73 74 69 6e 67 20 66 69 6c 65 73 0a 0a |existing files..| 00006450 57 68 65 6e 20 79 6f 75 20 65 78 74 72 61 63 74 |When you extract| 00006460 20 61 20 66 69 6c 65 2c 20 69 74 20 6d 61 79 20 | a file, it may | 00006470 62 65 20 74 68 61 74 20 61 20 66 69 6c 65 20 77 |be that a file w| 00006480 69 74 68 20 74 68 65 20 73 61 6d 65 20 6e 61 6d |ith the same nam| 00006490 65 20 0a 61 6c 72 65 61 64 79 20 65 78 69 73 74 |e .already exist| 000064a0 73 2e 20 49 66 20 74 68 69 73 20 6f 70 74 69 6f |s. If this optio| 000064b0 6e 20 69 73 20 6e 6f 74 20 73 65 74 2c 20 79 6f |n is not set, yo| 000064c0 75 20 77 69 6c 6c 20 62 65 20 70 72 6f 6d 70 74 |u will be prompt| 000064d0 65 64 20 74 6f 20 6f 76 65 72 77 72 69 74 65 0a |ed to overwrite.| 000064e0 74 68 65 20 66 69 6c 65 2e 20 49 66 20 79 6f 75 |the file. If you| 000064f0 20 74 68 65 6e 20 73 65 6c 65 63 74 20 4e 2c 20 | then select N, | 00006500 79 6f 75 20 77 69 6c 6c 20 62 65 20 70 72 6f 6d |you will be prom| 00006510 70 74 65 64 20 66 6f 72 20 70 65 72 6d 69 73 73 |pted for permiss| 00006520 69 6f 6e 20 74 6f 20 72 65 6e 61 6d 65 0a 74 68 |ion to rename.th| 00006530 65 20 66 69 6c 65 2e 20 49 66 20 79 6f 75 20 74 |e file. If you t| 00006540 68 65 6e 20 73 65 6c 65 63 74 20 59 2c 20 53 70 |hen select Y, Sp| 00006550 61 72 6b 20 77 69 6c 6c 20 70 69 63 6b 20 61 20 |ark will pick a | 00006560 73 65 6e 73 69 62 6c 65 20 6e 61 6d 65 2c 20 62 |sensible name, b| 00006570 75 74 20 69 66 20 79 6f 75 20 0a 73 65 6c 65 63 |ut if you .selec| 00006580 74 20 4e 2c 20 53 70 61 72 6b 20 77 69 6c 6c 20 |t N, Spark will | 00006590 63 6f 6e 74 69 6e 75 65 20 74 6f 20 74 68 65 20 |continue to the | 000065a0 6e 65 78 74 20 66 69 6c 65 20 74 6f 20 62 65 20 |next file to be | 000065b0 65 78 74 72 61 63 74 65 64 2e 20 54 68 65 20 27 |extracted. The '| 000065c0 6f 27 20 0a 6f 70 74 69 6f 6e 20 61 6c 6c 6f 77 |o' .option allow| 000065d0 73 20 79 6f 75 20 74 6f 20 70 72 65 76 65 6e 74 |s you to prevent| 000065e0 20 61 6c 6c 20 70 72 6f 6d 70 74 69 6e 67 2c 20 | all prompting, | 000065f0 61 6e 64 20 6a 75 73 74 20 6f 76 65 72 77 72 69 |and just overwri| 00006600 74 65 20 65 78 69 73 74 69 6e 67 20 0a 66 69 6c |te existing .fil| 00006610 65 73 2e 20 46 6f 72 20 65 78 61 6d 70 6c 65 3a |es. For example:| 00006620 0a 0a 2a 21 73 70 61 72 6b 20 2d 6f 20 2d 78 20 |..*!spark -o -x | 00006630 6d 79 5f 61 72 63 2f 0a 0a 0a 71 20 20 20 3d 20 |my_arc/...q = | 00006640 55 73 65 20 50 4b 41 52 43 20 73 74 79 6c 65 20 |Use PKARC style | 00006650 73 71 75 61 73 68 69 6e 67 0a 0a 53 71 75 61 73 |squashing..Squas| 00006660 68 69 6e 67 20 69 73 20 61 20 76 61 72 69 61 74 |hing is a variat| 00006670 69 6f 6e 20 6f 6e 20 4c 5a 57 20 63 6f 64 69 6e |ion on LZW codin| 00006680 67 20 75 73 65 64 20 62 79 20 74 68 65 20 66 61 |g used by the fa| 00006690 69 72 6c 79 20 70 6f 70 75 6c 61 72 20 50 43 0a |irly popular PC.| 000066a0 70 72 6f 67 72 61 6d 20 50 4b 41 52 43 2e 20 42 |program PKARC. B| 000066b0 79 20 61 64 64 69 6e 67 20 74 68 69 73 20 6f 70 |y adding this op| 000066c0 74 69 6f 6e 2c 20 79 6f 75 20 6d 61 6b 65 20 41 |tion, you make A| 000066d0 52 43 20 75 73 65 20 73 71 75 61 73 68 69 6e 67 |RC use squashing| 000066e0 20 69 6e 73 74 65 61 64 0a 6f 66 20 63 72 75 6e | instead.of crun| 000066f0 63 68 69 6e 67 2e 20 59 6f 75 20 73 68 6f 75 6c |ching. You shoul| 00006700 64 20 63 6f 6e 73 69 64 65 72 20 74 68 61 74 20 |d consider that | 00006710 73 71 75 61 73 68 69 6e 67 20 77 69 6c 6c 20 6e |squashing will n| 00006720 6f 74 20 61 6c 77 61 79 73 20 62 65 0a 6d 6f 72 |ot always be.mor| 00006730 65 20 65 66 66 69 63 69 65 6e 74 20 74 68 61 6e |e efficient than| 00006740 20 63 72 75 6e 63 68 69 6e 67 20 61 6e 64 20 6f | crunching and o| 00006750 66 74 65 6e 20 77 69 6c 6c 20 70 72 6f 64 75 63 |ften will produc| 00006760 65 20 6f 6e 6c 79 20 73 6d 61 6c 6c 20 67 61 69 |e only small gai| 00006770 6e 73 2e 20 0a 48 6f 77 65 76 65 72 2c 20 74 68 |ns. .However, th| 00006780 65 72 65 20 61 72 65 20 66 61 72 20 6d 6f 72 65 |ere are far more| 00006790 20 63 6f 70 69 65 73 20 6f 66 20 41 52 43 20 74 | copies of ARC t| 000067a0 68 61 6e 20 50 4b 41 52 43 2c 20 61 6e 64 20 74 |han PKARC, and t| 000067b0 68 65 73 65 20 77 69 6c 6c 20 6e 6f 74 0a 62 65 |hese will not.be| 000067c0 20 61 62 6c 65 20 74 6f 20 75 6e 70 61 63 6b 20 | able to unpack | 000067d0 73 71 75 61 73 68 65 64 20 61 72 63 68 69 76 65 |squashed archive| 000067e0 73 2e 20 41 52 43 20 66 72 6f 6d 20 76 65 72 73 |s. ARC from vers| 000067f0 69 6f 6e 20 31 2e 31 2c 20 63 61 6e 20 75 6e 70 |ion 1.1, can unp| 00006800 61 63 6b 0a 49 42 4d 50 43 20 61 72 63 68 69 76 |ack.IBMPC archiv| 00006810 65 73 20 6d 61 64 65 20 75 73 69 6e 67 20 50 4b |es made using PK| 00006820 41 52 43 20 61 6e 64 20 69 74 20 77 69 6c 6c 20 |ARC and it will | 00006830 64 6f 20 74 68 69 73 20 77 68 65 74 68 65 72 20 |do this whether | 00006840 79 6f 75 20 73 65 74 20 74 68 65 0a 71 20 66 6c |you set the.q fl| 00006850 61 67 20 6f 72 20 6e 6f 74 2e 0a 0a 0a 73 20 20 |ag or not....s | 00006860 20 3d 20 73 75 70 70 72 65 73 73 20 63 6f 6d 70 | = suppress comp| 00006870 72 65 73 73 69 6f 6e 20 28 73 74 6f 72 65 20 6f |ression (store o| 00006880 6e 6c 79 29 0a 0a 54 68 69 73 20 61 6c 6c 6f 77 |nly)..This allow| 00006890 73 20 79 6f 75 20 74 6f 20 61 64 64 20 66 69 6c |s you to add fil| 000068a0 65 73 20 74 6f 20 74 68 65 20 61 72 63 68 69 76 |es to the archiv| 000068b0 65 20 77 69 74 68 6f 75 74 20 63 6f 6d 70 72 65 |e without compre| 000068c0 73 73 69 6e 67 20 74 68 65 6d 2e 0a 0a 0a 76 20 |ssing them....v | 000068d0 20 20 3d 20 55 73 65 20 73 74 61 6e 64 61 72 64 | = Use standard| 000068e0 20 63 72 75 6e 63 68 69 6e 67 0a 0a 54 68 69 73 | crunching..This| 000068f0 20 61 6c 6c 6f 77 73 20 79 6f 75 20 74 6f 20 75 | allows you to u| 00006900 73 65 20 74 68 65 20 73 74 61 6e 64 61 72 64 20 |se the standard | 00006910 63 72 75 6e 63 68 69 6e 67 20 6d 65 74 68 6f 64 |crunching method| 00006920 20 61 73 20 75 73 65 64 20 62 79 20 61 72 63 20 | as used by arc | 00006930 6f 6e 20 74 68 65 20 50 43 2e 0a 0a 79 20 20 20 |on the PC...y | 00006940 3d 20 52 75 6e 20 69 6e 20 62 61 63 6b 67 72 6f |= Run in backgro| 00006950 75 6e 64 0a 0a 54 68 69 73 20 66 6c 61 67 2c 20 |und..This flag, | 00006960 74 65 6c 6c 73 20 53 70 61 72 6b 20 74 6f 20 63 |tells Spark to c| 00006970 61 6c 6c 20 77 69 6d 70 20 70 6f 6c 6c 20 65 76 |all wimp poll ev| 00006980 65 72 79 20 73 6f 20 6d 61 6e 79 20 63 65 6e 74 |ery so many cent| 00006990 69 73 65 63 6f 6e 64 73 2e 20 42 79 20 64 6f 69 |iseconds. By doi| 000069a0 6e 67 0a 74 68 69 73 2c 20 53 70 61 72 6b 20 63 |ng.this, Spark c| 000069b0 61 6e 20 61 70 70 65 61 72 20 74 6f 20 72 75 6e |an appear to run| 000069c0 20 69 6e 20 74 68 65 20 62 61 63 6b 67 72 6f 75 | in the backgrou| 000069d0 6e 64 20 77 68 69 6c 73 74 20 79 6f 75 20 64 6f |nd whilst you do| 000069e0 20 73 6f 6d 65 74 68 69 6e 67 20 65 6c 73 65 0a | something else.| 000069f0 66 72 6f 6d 20 74 68 65 20 64 65 73 6b 74 6f 70 |from the desktop| 00006a00 2e 20 42 79 20 76 61 72 79 69 6e 67 20 74 68 65 |. By varying the| 00006a10 20 6e 75 6d 62 65 72 20 6f 66 20 63 65 6e 74 69 | number of centi| 00006a20 73 65 63 6f 6e 64 73 2c 20 79 6f 75 20 63 61 6e |seconds, you can| 00006a30 20 63 6f 6e 74 72 6f 6c 20 68 6f 77 0a 6d 75 63 | control how.muc| 00006a40 68 20 74 69 6d 65 20 53 70 61 72 6b 20 74 61 6b |h time Spark tak| 00006a50 65 73 20 75 70 2e 20 53 6d 61 6c 6c 20 6e 75 6d |es up. Small num| 00006a60 62 65 72 73 2c 20 77 69 6c 6c 20 6d 61 6b 65 20 |bers, will make | 00006a70 53 70 61 72 6b 20 72 75 6e 20 73 6c 6f 77 6c 79 |Spark run slowly| 00006a80 20 62 75 74 20 61 6c 6c 6f 77 0a 6f 74 68 65 72 | but allow.other| 00006a90 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 20 6d 6f | applications mo| 00006aa0 72 65 20 74 69 6d 65 20 28 73 6f 20 74 68 65 79 |re time (so they| 00006ab0 20 77 6f 72 6b 20 62 65 74 74 65 72 29 2e 20 4c | work better). L| 00006ac0 61 72 67 65 20 6e 75 6d 62 65 72 73 2c 20 77 69 |arge numbers, wi| 00006ad0 6c 6c 20 6d 61 6b 65 0a 53 70 61 72 6b 20 72 75 |ll make.Spark ru| 00006ae0 6e 20 66 61 73 74 65 72 2c 20 62 75 74 20 77 69 |n faster, but wi| 00006af0 6c 6c 20 69 6e 74 65 72 66 65 72 65 20 6d 6f 72 |ll interfere mor| 00006b00 65 20 77 69 74 68 20 6f 74 68 65 72 20 70 72 6f |e with other pro| 00006b10 67 72 61 6d 73 2e 20 41 20 67 6f 6f 64 20 73 74 |grams. A good st| 00006b20 61 72 74 69 6e 67 0a 76 61 6c 75 65 2c 20 77 6f |arting.value, wo| 00006b30 75 6c 64 20 70 65 72 68 61 70 73 20 62 65 20 31 |uld perhaps be 1| 00006b40 30 2e 20 46 6f 72 20 65 78 61 6d 70 6c 65 3b 0a |0. For example;.| 00006b50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00006b60 20 20 20 21 73 70 61 72 6b 20 2d 79 20 31 30 20 | !spark -y 10 | 00006b70 2d 61 20 6e 65 77 5f 61 72 63 2f 20 63 0a 4e 6f |-a new_arc/ c.No| 00006b80 74 69 63 65 20 74 68 61 74 20 62 61 63 6b 67 72 |tice that backgr| 00006b90 6f 75 6e 64 20 6f 70 65 72 61 74 69 6f 6e 2c 20 |ound operation, | 00006ba0 69 73 20 6e 6f 74 20 70 6f 73 73 69 62 6c 65 20 |is not possible | 00006bb0 66 72 6f 6d 20 74 68 65 20 4f 53 20 2a 20 63 6f |from the OS * co| 00006bc0 6d 6d 61 6e 64 20 6c 69 6e 65 0a 70 72 6f 6d 70 |mmand line.promp| 00006bd0 74 2e 0a 0a 7a 20 20 20 3d 20 55 73 65 20 63 6f |t...z = Use co| 00006be0 6d 70 72 65 73 73 20 0a 0a 54 68 69 73 20 73 65 |mpress ..This se| 00006bf0 6c 65 63 74 73 20 74 68 65 20 63 6f 6d 70 72 65 |lects the compre| 00006c00 73 73 20 6d 65 74 68 6f 64 20 66 6f 72 20 63 6f |ss method for co| 00006c10 6d 70 61 63 74 69 6e 67 20 66 69 6c 65 73 2e 0a |mpacting files..| 00006c20 0a 0a 0a 53 6e 61 67 73 0a 3d 3d 3d 3d 3d 0a 28 |...Snags.=====.(| 00006c30 31 29 20 53 70 61 72 6b 20 75 73 65 73 20 74 68 |1) Spark uses th| 00006c40 65 20 73 68 61 72 65 64 20 43 20 6c 69 62 72 61 |e shared C libra| 00006c50 72 79 20 74 68 69 73 20 69 73 20 75 73 75 61 6c |ry this is usual| 00006c60 6c 79 20 63 6f 6e 74 61 69 6e 65 64 20 69 6e 20 |ly contained in | 00006c70 74 68 65 20 21 53 79 73 74 65 6d 0a 64 69 72 65 |the !System.dire| 00006c80 63 74 6f 72 79 20 77 68 69 63 68 20 69 73 20 73 |ctory which is s| 00006c90 75 70 70 6c 69 65 64 20 77 69 74 68 20 61 6c 6c |upplied with all| 00006ca0 20 63 6f 70 69 65 73 20 6f 66 20 52 49 53 43 20 | copies of RISC | 00006cb0 4f 53 20 61 6e 64 20 61 6c 73 6f 20 6f 6e 20 74 |OS and also on t| 00006cc0 68 65 20 53 70 61 72 6b 0a 64 69 73 6b 2e 20 49 |he Spark.disk. I| 00006cd0 66 20 66 6f 72 20 73 6f 6d 65 20 72 65 61 73 6f |f for some reaso| 00006ce0 6e 2c 20 79 6f 75 20 65 78 65 63 75 74 65 20 53 |n, you execute S| 00006cf0 70 61 72 6b 20 62 65 66 6f 72 65 20 6f 70 65 6e |park before open| 00006d00 69 6e 67 20 61 20 76 69 65 77 65 72 20 6f 6e 0a |ing a viewer on.| 00006d10 21 53 79 73 74 65 6d 2c 20 53 70 61 72 6b 20 77 |!System, Spark w| 00006d20 69 6c 6c 20 63 6f 6d 70 6c 61 69 6e 20 2d 20 27 |ill complain - '| 00006d30 53 79 73 74 65 6d 20 72 65 73 6f 75 72 63 65 73 |System resources| 00006d40 20 63 61 6e 6e 6f 74 20 62 65 20 66 6f 75 6e 64 | cannot be found| 00006d50 27 2e 0a 41 20 76 65 72 73 69 6f 6e 20 6f 66 20 |'..A version of | 00006d60 43 6c 69 62 20 67 72 65 61 74 65 72 20 74 68 61 |Clib greater tha| 00006d70 6e 20 33 2e 30 30 20 69 73 20 6e 65 65 64 65 64 |n 3.00 is needed| 00006d80 2e 20 54 68 69 73 20 69 73 20 73 75 70 70 6c 69 |. This is suppli| 00006d90 65 64 20 6f 6e 20 74 68 65 20 52 49 53 43 20 4f |ed on the RISC O| 00006da0 53 0a 75 70 67 72 61 64 65 20 64 69 73 63 2e 20 |S.upgrade disc. | 00006db0 49 20 63 61 6e 20 73 75 70 70 6c 79 20 63 6f 70 |I can supply cop| 00006dc0 69 65 73 20 69 6e 20 72 65 74 75 72 6e 20 66 6f |ies in return fo| 00006dd0 72 20 61 20 64 69 73 63 20 61 6e 64 20 72 65 74 |r a disc and ret| 00006de0 75 72 6e 20 70 6f 73 74 61 67 65 2e 0a 0a 28 32 |urn postage...(2| 00006df0 29 20 57 68 65 6e 65 76 65 72 20 79 6f 75 20 6d |) Whenever you m| 00006e00 6f 64 69 66 79 20 61 6e 20 61 72 63 68 69 76 65 |odify an archive| 00006e10 2c 20 53 70 61 72 6b 20 63 72 65 61 74 65 73 20 |, Spark creates | 00006e20 61 20 62 61 63 6b 75 70 20 63 6f 70 79 20 69 6e |a backup copy in| 00006e30 20 63 61 73 65 0a 61 6e 79 74 68 69 6e 67 20 67 | case.anything g| 00006e40 6f 65 73 20 77 72 6f 6e 67 20 64 75 72 69 6e 67 |oes wrong during| 00006e50 20 74 68 65 20 61 72 63 68 69 76 69 6e 67 20 70 | the archiving p| 00006e60 72 6f 63 65 73 73 2e 20 54 68 65 20 70 72 6f 62 |rocess. 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This i| 000071e0 73 20 6f 66 20 6e 6f 20 69 6d 70 6f 72 74 61 6e |s of no importan| 000071f0 63 65 2c 20 79 6f 75 72 20 66 69 6c 65 20 64 61 |ce, your file da| 00007200 74 61 20 69 73 20 73 74 69 6c 6c 0a 70 72 6f 74 |ta is still.prot| 00007210 65 63 74 65 64 20 62 79 20 69 6e 64 69 76 69 64 |ected by individ| 00007220 75 61 6c 20 63 72 63 27 73 20 6f 6e 20 65 61 63 |ual crc's on eac| 00007230 68 20 66 69 6c 65 2e 20 48 6f 77 65 76 65 72 2c |h file. However,| 00007240 20 69 66 20 79 6f 75 20 74 61 6b 65 20 61 70 61 | if you take apa| 00007250 72 74 20 61 6e 0a 61 72 63 68 69 76 65 20 77 69 |rt an.archive wi| 00007260 74 68 20 64 69 72 65 63 74 6f 72 69 65 73 20 69 |th directories i| 00007270 6e 20 69 74 20 75 73 69 6e 67 20 74 68 65 20 6f |n it using the o| 00007280 6c 64 20 27 61 72 63 27 2c 20 73 6f 6d 65 20 65 |ld 'arc', some e| 00007290 72 72 6f 72 20 6d 65 73 73 61 67 65 73 0a 77 69 |rror messages.wi| 000072a0 6c 6c 20 72 65 73 75 6c 74 2e 20 49 67 6e 6f 72 |ll result. 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This wa| 00007670 73 20 74 72 61 6e 73 66 65 72 72 65 64 20 74 6f |s transferred to| 00007680 20 74 68 65 20 41 74 61 72 69 20 53 54 20 61 6e | the Atari ST an| 00007690 64 20 41 6d 69 67 61 20 6d 69 63 72 6f 73 2e 20 |d Amiga micros. | 000076a0 49 6e 20 0a 61 64 64 69 74 69 6f 6e 2c 20 6f 74 |In .addition, ot| 000076b0 68 65 72 20 6d 6f 72 65 20 61 64 76 61 6e 63 65 |her more advance| 000076c0 64 20 76 65 72 73 69 6f 6e 73 20 6f 66 20 69 74 |d versions of it| 000076d0 20 61 70 70 65 61 72 65 64 20 6f 6e 20 74 68 65 | appeared on the| 000076e0 20 50 43 20 6c 69 6b 65 20 0a 50 4b 41 52 43 20 | PC like .PKARC | 000076f0 62 79 20 50 68 69 6c 20 4b 61 74 7a 2e 20 54 68 |by Phil Katz. 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