Documents/Features

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Documents/Features

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 » Archimedes archive » Apps » PipeDream 3 ()(Colton Software).adf
Filename:	Documents/Features
Read OK:	✔
File size:	3F52 bytes
Load address:	FFFDDE41
Exec address:	D305DDB0

%OP%DFT
%OP%TM4
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%CO:A,72,72%%H2%Changes between PipeDream 2 and PipeDream 3

The following is a brief introduction to the differences between 
versions 2 and 3 of PipeDream.  It is intended as a quick reference for 
users of previous versions of PipeDream to see what is available.  It 
does not attempt to go into detail over the new facilities - for this 
you will need to refer to the PipeDream User Guide.

%H2%Operating Systems

PipeDream version 3 works only under RISC OS and not under Arthur 1.2 
or earlier versions.  PipeDream version 2 works under both Arthur 1.2 
and RISC OS. 

%H2%SpellCheck

PipeDream version 3 incorporates PipeDream SpellCheck whereas 
SpellCheck was a separate option for PipeDream version 2.

%H2%Installation

Installation is much easier.  It comprises making a backup of the 
PipeDream master disc to a PipeDream working disc from which you will 
run PipeDream 3. The first time you run PipeDream 3 you will be asked 
to enter your name which will be included in the PipeDream program from 
then on.  Your PipeDream 3 disc also has a unique registration number 
identifying all working discs as having come from your master.

Having installed PipeDream fill in the registration card and return it 
to Colton Software.  You will then be a registered user. Only 
registered users are entitled to telephone support and upgrades to new 
releases.

Note that the unique registration number on the disc enables us to 
trace copies of your master disc.  You are allowed and welcome to make 
backup copies of the disc for your own use but you are not allowed to 
make copies of the disc for anyone else to use.  If you are unsure of 
your rights read the disc envelope carefully or phone Colton Software 
for guidance.

Software piracy is theft.  Thieves hurt genuine users just as much as 
they hurt software houses through giving upwards pressure on prices.  
We don't believe that the best way to stamp out software piracy is to 
protect discs because that makes life difficult for genuine users - the 
overwhelming majority.  Having unique registration numbers enables us 
to trace illegal copies very easily and to prosecute offenders 
effectively.

%H2%User Interface

PipeDream has been completely rewritten to take advantage of RISC OS in 
as many ways as possible.  A PipeDream document now appears in a window 
on the screen.  All of the resizing, scrolling and pointing operations 
are available, as are many drag and clicking operations.  The result is 
that PipeDream operates very much like Edit, rather than previous 
versions of PipeDream which took over the screen and took (almost) all 
input from the keyboard.

%H2%Many documents

PipeDream can cope with as many documents all loaded at once as can be 
fitted into memory.  Each document appears in its own window.  Note 
that it is one copy of PipeDream in the computer that is doing this, 
not one PipeDream for each window, so many documents can be loaded even 
on a 1Mbyte computer.

To see this in action make a selection of files in a directory viewer 
and drag the selection to the PipeDream icon on the icon bar.  Each 
file will be loaded into a new PipeDream window.

Blocks of data can be copied and moved between windows by marking a 
block in one window, positioning the caret in another and giving the 
relevant command.

%H2%Recovering deletions

PipeDream 2 remembered words and phrases that had been deleted and they 
could be recovered using the Paste command.  PipeDream 3 can also 
recover deleted rows, columns and blocks.  It maintains a list of up to 
255 deletions (the default is 50 and is configurable between 0-255) 
which can be pasted back into the text and any point by positioning the 
caret at the insertion point and giving the Paste command.

A block can be moved between windows by deleting it from one window and 
pasting it into another.

A new command Copy Block to Buffer is also provided which copies the 
the marked block to the paste list without deleting it from the text. 
It can be pasted in at any point, so that a copy of it is made.

%H2%Natural Recalculation

In addition to recalculating by row or column PipeDream 3 has natural 
recalculation.  This resolves problems of forward references where the 
spreadsheet might have to be recalculated more than once before all of 
the values were up-to-date.  With automatic recalculation on, it is 
usually significantly faster, as only those slots that change value, 
rather than all slots in the spreadsheet, are recalculated.

Natural recalculation requires extra memory to record the information 
as to which slots affect which others.  If PipeDream runs out of memory 
it will automatically switch to recalculation by column, giving a 
message saying it is doing so.  

%H2%Background, interruptible recalculation

PipeDream's recalculation is performed in short time-slices in the 
background so you can continue with other tasks whilst recalculation is 
proceeding.

%H2%Memory Usage

PipeDream 3 employs greater data compaction and more sparse matrix 
techniques enabling larger files to be loaded into the same amount of 
memory.  The amount of improvement will depend upon the data but, in 
general, the sparser the file (ie the more blank slots there are) the 
greater the improvement. 

Additionally PipeDream communicates intelligently with RISC OS to use 
only the amount of memory it needs at any time, giving memory back to 
the system when it is no longer needed.  It is very important for 
applications to cooperate in this way in a multi-tasking environment so 
that the very most may be made of the available memory (because there 
is never enough of it).  Applications cooperating in this manner are 
more usable and less frustrating.

%H2%Insert on return

Users of other word processors often prefer the current line to be 
split when they press the Return key and for the two lines to be joined 
again when a delete backwards is made at the beginning of the line or a 
delete forwards at the end of the line.  Others don't.

A new option Insert on return in the Options dialogue box enables users 
to set this either way.  Its status can also be saved in the 
initialisation file so that it is permanently the way you want it to 
be.

%H2%Replicate

There are two new commands which, in most cases, make replication 
faster and smoother than the using the Replicate command.  Replicate 
Right (Ctrl BRR) copies the left-most column of a marked block to all 
of the other columns in the block.  Replicate Down (Ctrl BRD) copies 
the top row of a block to all of the other rows in the block.  Since 
blocks can be marked very easily by dragging the mouse from one corner 
to an opposite corner and the commands can be selected from the menu 
with the mouse a replicate can be done very quickly without touching 
the keyboard.

The old command Replicate is still present and is the same as before.  

%H2%Alt-key sequences

In addition to the selection of commands from menus by using the mouse 
the hot-key sequences have been retained and are similar to those on 
all other versions of PipeDream.  Unfortunately however it was 
necessary for PipeDream to change to use the Ctrl key rather than the 
Alt keys as the shifting key.  This is because the specification of the 
Alt key was changed by Acorn to be used with foreign character sets, 
after PipeDream version 2 was written .  It was not possible within the 
rules of RISC OS for PipeDream to use the Alt key as a shifting key.

So on the Z88 the shifting key is <>, on the PC and Archimedes 
PipeDream version 2 it is Alt, and on RISC OS PipeDream it is Ctrl.  It 
is, of course, usually preferable to select commands from menus with 
the mouse.

The changes to the Alt key also mean that it is no longer possible for 
Alt + function key to be defined by the user.

%H2%Previous match (Ctrl BPM)

Previous match is the opposite of Next match and moves the caret back 
to the previous occurrence of the string given in the Search dialogue 
box.  It is most useful when inadvertently giving too many Next match 
commands but can be used for searching a file backwards if you so 
desire.

%H2%Subgrams (Ctrl SH)

Subgrams are like anagrams without the restriction that all letters of 
the original word must be used.  eg a, me, mad, dame and armed are all 
subgrams of Dream.  This feature will help you to impress your friends 
with your massive vocabulary and win newspaper competitions.

%H2%Carriage return and linefeed

The position with Archimedes software and carriage returns (CR) and 
linefeeds (LF) seems to be a little confused.  Some editors use CR as 
their line separator (deriving from BBC days), some editors use LF 
(deriving from UNIX), some editors use CR,LF (deriving from CP/M and 
MS-DOS).  It would be helpful if all editors could automatically load 
files of any type (like PipeDream can) but, sadly, this is not the 
case.  So PipeDream 3 has an option in the Save dialogue box which 
enables to specify what line separator to save the file with.  The 
options are CR, LF, CR+LF, LF+CR.

%H2%Negative numbers

Negative numbers in expression slots can be displayed on the screen in 
a different colour to the rest of the text.  This can be very striking 
when the colour chosen is red.

%H2%Centre window

This new command is provided to position the line containing the caret 
in the middle of the window.

%H2%Fixed rows and columns

The status of fixed rows and columns is now saved with the file.

%H2%Sorting

Sorting in PipeDream 3 is several times faster than version 2 (the 
exact factor depending on the data file).  PipeDream 3 can now sort 
multi-row records. Rows that are blank in the first key field are bound 
to the first row above that is not blank in the first key field.  This 
enables records containing paragraphs of text, for example, to be 
sorted.

%H2%Date format

A textual date format has been provided in addition to displaying dates 
in English or American formats.

%H2%File formats

PipeDream can now load and save VIEW files, can load ViewSheet files 
and can save Acorn DTP files.

%H2%Thousands

PipeDream 3 can display large numbers in a variety of ways.  Several 
separators can be used to separate thousands and millions.  For example

  1234567.89
1 234 567.78
1,234,567.89
1.234.567,89

%H2%Database functions

The syntax of database functions has been improved.  In PipeDream 2 the 
$ operator was used to determine both whether the slot reference should 
be updated during replication and also whether the slot reference 
should be updated during recalculation.  In PipeDream 3 each od these 
has its own operator.  $ is still used to determine whether the slot 
reference should be updated during replication.  # is used to determine 
whether the slot reference should be updated during recalculation.

This change means that database functions written in files for 
PipeDream 2 may produce different results in PipeDream 3 and database 
functions written in files for Pipedream 3 may not be accepted in 
Pipedream 2.  When converting files from PipeDream 2 to Pipedream 3 it 
is usually necessary to either replace $ signs in the condition string 
with a # or add a # and retain the $.

%H2%Spreadsheet functions

The following new spreadsheet functions have been provided:

ATN2(x,y)
MONTHDAYS(date)

RAND(n)
ROUND(n,p)
ROW(),COL()

DCOUNTA(range,condition)

%H2%Printing

As well as having its own printer driver system, PipeDream 3 can also 
print using the RISC OS printer drivers supplied by Acorn.  Which 
method you use is up to you.  The PipeDream drivers will usually be 
much faster than the RISC OS drivers because they just sending out 
lines of characters, whereas the RISC OS drivers build up pages of 
bit-mapped graphics.  Only the RISC OS drivers can print pictures and 
fonts.

Extra options have been added to the Print dialogue box to print 
multiple copies and two-sided printing.  Two-sided printing is 
reversing the order of parameters in headers and footers on even 
numbered (left-hand) pages and printing extra characters in the left 
margin of odd numbered (right-hand) pages.  Note that it is not the far 
more useful ability to print on both sides of the paper without your 
turning it over.  (That's a hardware problem.)

%H2%External references

With more than one file loaded it is possible to access slots in files 
in other windows, and so you can link several spreadsheets together to 
generate grand totals or create 3-dimensional models.

%H2%Save

After saving a file with a new name the file in memory is renamed also.

%H2%Save/Restore/Swap position

Save Position has been assigned to function key Shift F11.  Restore 
position has been assigned to function key Ctrl F11.  Swap position and 
caret has been assigned to function key F11.  This enables you to set a 
position with Shift F11, move somewhere else and toggle between the 
positions be pressing F11.

%H2%Macro recorder

PipeDream 3 has a macro recorder which enables you to build macro files 
very easily.  The procedure is very similar to using the *Spool 
command.  Giving the Record Macro File prompts you for the name of the 
file for the macros to be inserted into.  Then all text that 
you type and commands that you give, but not mouse movements, are 
stored in the file ready for you to use with the Do Macro File command.

Creating macro files in this way is much easier than typing the 
commands in yourself.  An additional benefit is that it generates files 
which you can load into PipeDream windows to examine, and edit if you 
wish.

One point to bear in mind if you have macro files that you have built 
for use with PipeDream 2 is that the format has been simplified a 
little.  Now only one command is allowed on a line in the macro file - 
any text after the |m is treated as comment and ignored.  This enables 
macro files to be a lot more understandable but it means that any 
existing files that you have will do different things with PipeDream 3 
and PipeDream 3 files that you create will not generally work with 
PipeDream 2.

%H2%Slot Protection

Arbitrary blocks of slots can be protected in PipeDream 3.  The 
protection prevents you from accidentally overwriting or deleting the 
slot contents. Protected slots are displayed using a different 
background colour than normal to make them stand out; this colour may 
be changed using the Colours dialogue box.

%H2%Iteration

Recalculation can be made to iterate which gives the ability to 
recalculate a set of formulae until a specified result has been 
achieved.

%H2%Pictures

PipeDream 3 can display pictures that have been created by Draw, Paint 
or other drawing applications.  These are displayed over blank slots on 
screen and can be printed via the RISC OS printer drivers.

%H2%Z88 filing system

PipeDream 2 has the ability to load and save files directly to the Z88.  
PipeDream 3 provides a Z88 filing system which makes the process rather 
more general and fits in better with the RISC OS philosophy.  The Z88 
Filer icon sits on the icon bar with the other filing system icons and 
provides a device viewer and directory viewers in a similar way to the 
drive icons.  Files can be dragged from directories in the Z88 straight 
into PipeDream and can be saved back again in a similar way.  Files can 
also be saved to the Z88 by dragging them from other applications.

Note that the A3000 does not come with a complete serial port and needs 
to have a simple upgrade before you will be able to plug in the Z88 or 
a serial printer.  This upgrade should be available from your dealer.

%H2%Help

PipeDream supports the RISC OS help system and provides useful context 
sensitive help, mainly of mouse operations in different areas of the 
window.  A useful summary of mouse operations is given at the end of 
Section 3, Chapter 1.

%H2%Fonts

PipeDream 3 can use all of the fonts provided with RISC OS.  New 
facilities are provided to set the global font for a document, to 
insert font changes within documents and to specify font sizes.  Fonts 
are printed using the RISC OS printer drivers and cannot be printed 
using the PipeDream printer drivers.

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00003f50  2e 0a                                             |..|
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