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25-12-87/DBINFO
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 » CEEFAX disks » telesoftware4.adl |
| Filename: | 25-12-87/DBINFO |
| Read OK: | ✔ |
| File size: | 4519 bytes |
| Load address: | 0000 |
| Exec address: | FFFFFFFF |
File contents
A DATA-BASE SYSTEM by ROB ANDERSON.
INTRODUCTION
This data base program enables a collection of records (of any format) to
be processed in a variety of ways, and should provide a good introduction
into the use of data-base systems in general. By following the BASIC
program listing it should also give the reader an insight into how such a
system works, and ultimately how to go about writing a system of your own.
The actual data that goes to make up the data-file is held in computer
memory, which does restrict the amount of data that can be stored in one
file, but by using this method very fast access times to the data are
achieved (e.g. with searches etc.), and it also provides a good way for
tape users to store a reasonable amount of records without having to wait
a long time for it all to load.
Thus, in summary, this system could be of use to :
i) Tape and disc users who require a small but fast data-base system to
store for example names, addresses and telephone numbers, of which roughly
200 names etc may be stored using a reasonably sized record format.
ii) Someone who has never used a data-base system before, and is wanting
some experience with a small system so as to obtain a better understanding
of the basic principles involved.
iii) From the programming point of view there is a full description of the
routines etc. included in this article, which may help someone to write a
system of there own.
WHAT DATABASE DOES :
As the name suggests, this program is a data base that enables pieces of
data to be saved and recalled and, once entered, this data can be
processed in many different ways that are described later. The types of
data entered are up to you, but for example the system could hold names,
addresses and phone numbers, which could then be recalled whenever you
want. Before going on, I will now explain what exactly a data file is,
which will make the rest of the article easier to follow.
Still using our example of a names file, a typical entry (which is called
a RECORD), may be :
RECORD 1
---------------------------
NAME : BOB ANDERSON
ADDRESS : 13 BACKERS FIELD,
MARTON,
THE BORO,
ENGLAND.
PHONE NOS: (0123) 456789
---------------------------
The strings "NAME :", "ADDRESS :", and "PHONE NOS :" are the FIELD TITLES,
which remain constant once the file has been set up.
After the field titles have been defined, you then have to define the
field lengths, which means the amount of characters that may be needed to
hold, for example, an address. In the above example, a good field length
for the field title "NAME :" would be about 20, because it would be
unlikely to have a name with more than 20 characters in it.
As a summary then, DATABASE enables you to firstly enter the field titles
and field lengths that are wanted for the file, and once set up, the user
can then enter records into the file.
SCREEN LAYOUT :
The program uses MODE7 to work in, thus leaving plenty of memory for the
data file. The screen is split up into three main areas. The top part of
the screen gives details of the commands available, and whenever a command
is selected, a more detailed explanation is given.
The middle part of the screen is used to display the currently selected
record, while the bottom of the screen gives details about the current
data file, including the amount of records currently in the file, the
remaining memory space, the last filename entered and the record number of
the record that is currently being displayed.
DATABASE COMMANDS :
As well as enabling a file to be created, DATABASE also supports certain
commands that can do various things to the records that have been entered.
The commands are accessed by simply pressing the appropriate key, upon
which you will be given information about how to use the command and what
it does. If you try to use a command that cannot be used at that moment
(e.g. if you try to add a record to a file that does not exist), the
program will inform you, and also give you a hint as to what might have
gone wrong, and how to remedy the problem. The program is very user
friendly in this respect, and because of this you should soon learn how to
use the program to its fullest potential. Do not worry about crashing the
program due to, for example, an illegal operating system call because
there is an error checking routine that traps any errors, reports them,
and then returns control back to the program without losing the data file
that was currently in memory (if there was one).
The commands available are :
(A) ADD - add a record.
(B) BACK - backstep through the file.
(D) DELETE - delete a record.
(E) EDIT - edit a record.
(F) FORWARD - forwardstep through the file.
(H) HELP - gives details of commands.
(K) KEEP - save the file.
(L) LOAD - load the file.
(N) NEW - define new file.
(O) ORDER - re-arrange file.
(*) *OS - enter OS command.
(P) PRINT - send file to printer.
(R) RESET - reset DATABASE.
(S) SEARCH - search for a record.
As mentioned before, DATABASE is very user-friendly, and you should have
no problems using the commands, but in case there are a few points that
are still not clear when using the program, an explanation is now given of
all the commands.
ADD Enables a record to be added to the data file currently in memory. The
record added is placed at the end of the file.
BACK Whenever B is pressed, the current record number is decremented by
one, so that the previous record is displayed on the screen. This
command, along with (F) FORWARD, enables the file to be scanned through,
a record at a time.
DELETE This will delete the record current being displayed on the screen,
afterwhich the file will be compacted. Because this commmand is
irreversable in its effect, you are first asked if you really want to go
ahead and delete the record.
EDIT This command will enable the displayed record to be edited, enabling
mistakes etc. to be corrected.
FORWARD Enables the records to be scanned in a forward direction (see
BACK).
HELP This command is very usefull because it gives a summary of all the
commands and what they do.
KEEP Results in the data file in memory being saved to the currently
active filing system, which can then be loaded in using LOAD.
LOAD Enables a previously saved file to be loaded in from a filing
system. After typing in the filename of the data file, you will also have
to type in the password that has previously been given to the file, and
only when the correct password has been entered will the rest of the file
be loaded in. When typing in the password, it will not be printed up on
the screen so as to prevent anyone else seeing it! If an attempt is made
to load a data file that was not created by DATABASE, the file will be
rejected.
NEW This command enables a new file to be created, provided there is not a
file already in memory upon which it will have to be deleted using RESET.
When defining a file, the first thing that must be done is to define the
field titles, afterwhich the field lengths must be entered. Great care
must be made when defining these because they cannot be later changed.
You should not have any problems setting up a file because the program
gives all the details about how to go about it. Finally you will be asked
for a password that is to go with the file, which will stop any
unathourised people from seeing your info.. (but make sure you remember
the password or you won't be able to see your file either!).
ORDER This can swap two records with each other, which enables you to move
the records around the file so as to put them in the order you want them.
When you use the command, you will be asked for two record numbers, which
are the two to be swapped.
*OS To access this command simply keep SHIFT pressed and then hit the *
key. A * will then come onto the screen, afterwhich you can enter your
operating system command. This enables you to do things such as
cataloging a disc (*CAT), or selecting a filing system (*DISC, *TAPE
etc). For more details of operating system commands, see page 416 of the
user guide.
PRINT If a printer is connected to your computer you will be able to get a
hard copy of a single record, or the whole file. When printing out all
the records, you will be asked for an inter-record space character which
will be printed in a long line to seperate each record on the paper (a
suitable character is a '-').
RESET When you press 'R' this wipes the memory where the current file
is stored, thus wiping out the file. Use this command carefully, and
make sure that you have saved the file before using RESET.
SEARCH This command enables you to find a record quickly by asking for
a search record, afterwhich it will search the file for another
record that is the closest match. Upon deciding which is the best
bet, it will print out the closest matching record. So, for example,
if you wanted to know Mike's phone number, you would enter Mike into
the name field, and then the computer would come up with the rest of
his record. If there were two Mike's in the file then you would have
to specify his second name in the search record (i.e. MIKE DIXON).
TECHNICAL POINTS OF THE PROGRAM :
DATABASE is written the way most programs are; a big main program loop at
the beginning, followed by loads of procedures that are called up from
this loop. Because of this the program is quite easy to follow, with each
command being allocated a separate subroutine (see list of procedures).
Where speed is important (e.g. when printing a record while scanning), the
program has been coded accordingly, using integer variables etc..
The coding to perform each of the features is fairly standard, but with a
few exceptions; the save and load functions do their job by saving the
file as one big block of memory (i.e using *LOAD and *SAVE), which
initially poses a problem because you cannot specify a filename in a
variable in this case, so a string had to be built up in memory, and then
passed onto the command line interpreter (at &FFF7). Although in BASIC2
the command OSCLI could be used, the way it is ensures compatibility with
BASIC1. Another unusual point of the program is the extensive use of
indirection operators to store the records directly in memory which, while
very laborious to program in when compared to the ease of use of arrays,
does have its relevant merits that are explained later.
It can be seen that *FX200,1 and *FX200,0 are used a lot, which enable and
disable the ESCAPE key. The reason is that while the escape key works most
of the time, enabling you to get out of a command that you accidently
entered, it could be dangerous to escape when, for example, deleting a
record because if ESCAPE was pressed while the program was shifting all
the following records on top of the deleted record, the whole file could
be corrupted. So to prevent this the escape key is disabled just before
the routine is entered, and then enabled after leaving the routine. This
is done with most of the routines.
The search routine used in the program works on a token basis, giving
points for each field of a record that matches with the search record, and
then printing out the record that got most points. If two records get the
same points, the first one encountered in the file is output, and because
of this it is always best to put as much information in the search record
as you can remember.
PROCEDURES LINE NOS DESCRIPTION
initialise 310 Initialises variables etc..
checkerror 370 Analyses error & reacts acordingly.
setscreen 390 Sets up screen.
a 480 Performs ADD command.
b 620 Performs BACK command.
d 690 Performs DELETE command.
e 870 Performs EDIT command.
f 1120 Performs FORWARD command.
h 1190 Performs HELP command.
k 1220 Performs KEEP command.
l 1290 Performs LOAD command.
n 1390 Performs NEW command.
o 1770 Performs *OS command.
p 1810 Performs PRINT command.
s 1980 Performs SEARCH command.
r 2230 Performs RESET command.
or 2250 Performs ORDER command.
topw 2390 Sets top text window.
botw 2410 Sets bottom text window.
options 2430 Prints out commands available in the top text
window.
title 2450 Prints command that has just been selected in a
a 'pretty' blue box!
sp 2470 Asks user to press the space bar to continue.
sure 2490 Asks if you really want to continue. If so
'ss'=0, otherwise 'ss'=1.
clear 2520 Wipes file memory.
precord 2570 Prints the current record held in 'record'.
pfield 2730 Prints the field titles of the file.
gfname 2810 Asks the user for a filename.
exist 2850 Tells the user that a file already exists.
nrecord 2890 Tells the user that there are no records
currently in the file.
getbytes(G) 2910 Gets the contents of a two byte number (G is the
first byte minus 'starta'), and places the result
in 'H'.
putbytes(G) 2930 Puts the value of 'H' in two memory bytes
starting at 'G+starta'.
oscli(A$) 2950 Passes 'A$' onto the command line interpreter.
This routine will work in BASIC 1 and BASIC 2.
inputrec1 2970 Inputs a record from the keyboard into a string.
IMPORTANT VARIABLES DESCRIPTION
A%,B%,C%,D%,E%,F%,G%,X%,Y% USED IN VARIOUS LOOPS.
A,B,C,D,E,F,G,H,I,J,K USED IN VARIOUS LOOPS.
flag Used to flag certain events.
flag2 Used to flag certain events.
record Holds record number that is currently being
displayed.
ss A flag for PROCEDURE 'sure'
starta Points at start of memory for the file.
A$,B$,C$ Used for various string handling routines.
file$ Holds last filename entered.
f$(16),le(16),len(16) Used to hold a record as a string.
FILE FORMAT :
The records, field titles and field lengths are all kept in memory up
above the BASIC program, and are dumped directly there using indirection
operators. The reason for this is mainly for memory saving because
although string arrays are very nice and easy to use, they tend to take up
a lot of memory, which is very important when all the records are in
memory at once.
The actual contents of the file start at the memory location stored in
'starta', where the password, field titles, etc. are kept. After this
comes the records themselves which follow on one after the other.
MEMORY USAGE :
DATABASE is a 10k BASIC program which can be run at any PAGE address less
than or equal to &1900. The data file resides at &4500, which is what the
program sets HIMEM to, so as to prevent BASIC running into the data file.
The TOP of the program is at about &4000, which leaves (HIMEM-TOP)=1k
bytes for variable storage. The top of user memory is &7C00, so this
leaves (&7C00-&4500)=14k bytes of memory free for the data file, which
means that typically about 200 records of 5 fields of 10 characters per
field can be entered, which is quite a useful size.
MEMORY USAGE SUMMARY :
. .
. .
. MODE 7 .
. .
______________________ &7C00
. .
14k . DATA FILE .
. .
______________________ HIMEM = &4500
. .
1k . VARIABLE STORAGE .
. .
______________________ TOP = &4000
. .
10k . BASIC PROGRAM .
. .
______________________ PAGE = &1900
. .
. .
TAPE USERS :
DATABASE is quite suited to tape users due to it keeping all the records
in memory at once, and so they only have to be loaded once, afterwhich all
processing can take place in computer memory. By saving and loading the
data using *SAVE and *LOAD also means that the data can be saved/ loaded
much more quickly than if BASIC's FILE commmands (such as PRINT#, PTR#
etc) were used.
EFFICIENT USE OF DATABASE :
When using DATABASE there are a few little tips that can make it easier
and more efficient to use.
When defining a NEW record, think carefully about how to define it because
once set out, it cannot be changed which means that if you have entered
say 100 records, and then find out that you need another field for certain
entries, you will have to type the whole file in again! Because of this,
it is also a good idea to have a field called 'ANYTHING ELSE' or
'MISCELLANEOUS', for records that may have unusual entries.
When entering your field titles, you can still use the function keys to
get MODE 7 coloured characters, which enables you to set up a file that
stands out well, making it easier and more colourful to use (although you
may get funny noises coming from your printer when printing a record!).
If you have no need for security precautions, use the password 'DATABASE'
for your file, as this is suggested by the program which makes it
impossible for you to forget!
As a finally note, ALWAYS KEEP COPIES OF YOUR DATA FILES, because if you
don't you'll have to learn the hard way, so be warned!
R.S.ANDERSON. JAN 1987.
00000000 20 20 20 20 20 20 20 20 20 20 20 41 20 44 41 54 | A DAT| 00000010 41 2d 42 41 53 45 20 53 59 53 54 45 4d 20 62 79 |A-BASE SYSTEM by| 00000020 20 52 4f 42 20 41 4e 44 45 52 53 4f 4e 2e 0d 0d | ROB ANDERSON...| 00000030 49 4e 54 52 4f 44 55 43 54 49 4f 4e 0d 0d 54 68 |INTRODUCTION..Th| 00000040 69 73 20 64 61 74 61 20 62 61 73 65 20 70 72 6f |is data base pro| 00000050 67 72 61 6d 20 65 6e 61 62 6c 65 73 20 61 20 63 |gram enables a c| 00000060 6f 6c 6c 65 63 74 69 6f 6e 20 6f 66 20 72 65 63 |ollection of rec| 00000070 6f 72 64 73 20 28 6f 66 20 61 6e 79 20 66 6f 72 |ords (of any for| 00000080 6d 61 74 29 20 74 6f 0d 62 65 20 70 72 6f 63 65 |mat) to.be proce| 00000090 73 73 65 64 20 69 6e 20 61 20 76 61 72 69 65 74 |ssed in a variet| 000000a0 79 20 6f 66 20 77 61 79 73 2c 20 61 6e 64 20 73 |y of ways, and s| 000000b0 68 6f 75 6c 64 20 70 72 6f 76 69 64 65 20 61 20 |hould provide a | 000000c0 67 6f 6f 64 20 69 6e 74 72 6f 64 75 63 74 69 6f |good introductio| 000000d0 6e 0d 69 6e 74 6f 20 74 68 65 20 75 73 65 20 6f |n.into the use o| 000000e0 66 20 64 61 74 61 2d 62 61 73 65 20 73 79 73 74 |f data-base syst| 000000f0 65 6d 73 20 69 6e 20 67 65 6e 65 72 61 6c 2e 20 |ems in general. | 00000100 42 79 20 66 6f 6c 6c 6f 77 69 6e 67 20 74 68 65 |By following the| 00000110 20 42 41 53 49 43 0d 70 72 6f 67 72 61 6d 20 6c | BASIC.program l| 00000120 69 73 74 69 6e 67 20 69 74 20 73 68 6f 75 6c 64 |isting it should| 00000130 20 61 6c 73 6f 20 67 69 76 65 20 74 68 65 20 72 | also give the r| 00000140 65 61 64 65 72 20 61 6e 20 69 6e 73 69 67 68 74 |eader an insight| 00000150 20 69 6e 74 6f 20 68 6f 77 20 73 75 63 68 20 61 | into how such a| 00000160 0d 73 79 73 74 65 6d 20 77 6f 72 6b 73 2c 20 61 |.system works, a| 00000170 6e 64 20 75 6c 74 69 6d 61 74 65 6c 79 20 68 6f |nd ultimately ho| 00000180 77 20 74 6f 20 67 6f 20 61 62 6f 75 74 20 77 72 |w to go about wr| 00000190 69 74 69 6e 67 20 61 20 73 79 73 74 65 6d 20 6f |iting a system o| 000001a0 66 20 79 6f 75 72 20 6f 77 6e 2e 0d 0d 54 68 65 |f your own...The| 000001b0 20 61 63 74 75 61 6c 20 64 61 74 61 20 74 68 61 | actual data tha| 000001c0 74 20 67 6f 65 73 20 74 6f 20 6d 61 6b 65 20 75 |t goes to make u| 000001d0 70 20 74 68 65 20 64 61 74 61 2d 66 69 6c 65 20 |p the data-file | 000001e0 69 73 20 68 65 6c 64 20 69 6e 20 63 6f 6d 70 75 |is held in compu| 000001f0 74 65 72 0d 6d 65 6d 6f 72 79 2c 20 77 68 69 63 |ter.memory, whic| 00000200 68 20 64 6f 65 73 20 72 65 73 74 72 69 63 74 20 |h does restrict | 00000210 74 68 65 20 61 6d 6f 75 6e 74 20 6f 66 20 64 61 |the amount of da| 00000220 74 61 20 74 68 61 74 20 63 61 6e 20 62 65 20 73 |ta that can be s| 00000230 74 6f 72 65 64 20 69 6e 20 6f 6e 65 0d 66 69 6c |tored in one.fil| 00000240 65 2c 20 62 75 74 20 62 79 20 75 73 69 6e 67 20 |e, but by using | 00000250 74 68 69 73 20 6d 65 74 68 6f 64 20 76 65 72 79 |this method very| 00000260 20 66 61 73 74 20 61 63 63 65 73 73 20 74 69 6d | fast access tim| 00000270 65 73 20 74 6f 20 74 68 65 20 64 61 74 61 20 61 |es to the data a| 00000280 72 65 0d 61 63 68 69 65 76 65 64 20 28 65 2e 67 |re.achieved (e.g| 00000290 2e 20 77 69 74 68 20 73 65 61 72 63 68 65 73 20 |. with searches | 000002a0 65 74 63 2e 29 2c 20 61 6e 64 20 69 74 20 61 6c |etc.), and it al| 000002b0 73 6f 20 70 72 6f 76 69 64 65 73 20 61 20 67 6f |so provides a go| 000002c0 6f 64 20 77 61 79 20 66 6f 72 0d 74 61 70 65 20 |od way for.tape | 000002d0 75 73 65 72 73 20 74 6f 20 73 74 6f 72 65 20 61 |users to store a| 000002e0 20 72 65 61 73 6f 6e 61 62 6c 65 20 61 6d 6f 75 | reasonable amou| 000002f0 6e 74 20 6f 66 20 72 65 63 6f 72 64 73 20 77 69 |nt of records wi| 00000300 74 68 6f 75 74 20 68 61 76 69 6e 67 20 74 6f 20 |thout having to | 00000310 77 61 69 74 0d 61 20 6c 6f 6e 67 20 74 69 6d 65 |wait.a long time| 00000320 20 66 6f 72 20 69 74 20 61 6c 6c 20 74 6f 20 6c | for it all to l| 00000330 6f 61 64 2e 0d 0d 54 68 75 73 2c 20 69 6e 20 73 |oad...Thus, in s| 00000340 75 6d 6d 61 72 79 2c 20 74 68 69 73 20 73 79 73 |ummary, this sys| 00000350 74 65 6d 20 63 6f 75 6c 64 20 62 65 20 6f 66 20 |tem could be of | 00000360 75 73 65 20 74 6f 20 3a 0d 0d 69 29 20 54 61 70 |use to :..i) Tap| 00000370 65 20 61 6e 64 20 64 69 73 63 20 75 73 65 72 73 |e and disc users| 00000380 20 77 68 6f 20 72 65 71 75 69 72 65 20 61 20 73 | who require a s| 00000390 6d 61 6c 6c 20 62 75 74 20 66 61 73 74 20 64 61 |mall but fast da| 000003a0 74 61 2d 62 61 73 65 20 73 79 73 74 65 6d 20 74 |ta-base system t| 000003b0 6f 0d 73 74 6f 72 65 20 66 6f 72 20 65 78 61 6d |o.store for exam| 000003c0 70 6c 65 20 6e 61 6d 65 73 2c 20 61 64 64 72 65 |ple names, addre| 000003d0 73 73 65 73 20 61 6e 64 20 74 65 6c 65 70 68 6f |sses and telepho| 000003e0 6e 65 20 6e 75 6d 62 65 72 73 2c 20 6f 66 20 77 |ne numbers, of w| 000003f0 68 69 63 68 20 72 6f 75 67 68 6c 79 0d 32 30 30 |hich roughly.200| 00000400 20 6e 61 6d 65 73 20 65 74 63 20 6d 61 79 20 62 | names etc may b| 00000410 65 20 73 74 6f 72 65 64 20 75 73 69 6e 67 20 61 |e stored using a| 00000420 20 72 65 61 73 6f 6e 61 62 6c 79 20 73 69 7a 65 | reasonably size| 00000430 64 20 72 65 63 6f 72 64 20 66 6f 72 6d 61 74 2e |d record format.| 00000440 0d 0d 69 69 29 20 53 6f 6d 65 6f 6e 65 20 77 68 |..ii) Someone wh| 00000450 6f 20 68 61 73 20 6e 65 76 65 72 20 75 73 65 64 |o has never used| 00000460 20 61 20 64 61 74 61 2d 62 61 73 65 20 73 79 73 | a data-base sys| 00000470 74 65 6d 20 62 65 66 6f 72 65 2c 20 61 6e 64 20 |tem before, and | 00000480 69 73 20 77 61 6e 74 69 6e 67 0d 73 6f 6d 65 20 |is wanting.some | 00000490 65 78 70 65 72 69 65 6e 63 65 20 77 69 74 68 20 |experience with | 000004a0 61 20 73 6d 61 6c 6c 20 73 79 73 74 65 6d 20 73 |a small system s| 000004b0 6f 20 61 73 20 74 6f 20 6f 62 74 61 69 6e 20 61 |o as to obtain a| 000004c0 20 62 65 74 74 65 72 20 75 6e 64 65 72 73 74 61 | better understa| 000004d0 6e 64 69 6e 67 0d 6f 66 20 74 68 65 20 62 61 73 |nding.of the bas| 000004e0 69 63 20 70 72 69 6e 63 69 70 6c 65 73 20 69 6e |ic principles in| 000004f0 76 6f 6c 76 65 64 2e 0d 0d 69 69 69 29 20 46 72 |volved...iii) Fr| 00000500 6f 6d 20 74 68 65 20 70 72 6f 67 72 61 6d 6d 69 |om the programmi| 00000510 6e 67 20 70 6f 69 6e 74 20 6f 66 20 76 69 65 77 |ng point of view| 00000520 20 74 68 65 72 65 20 69 73 20 61 20 66 75 6c 6c | there is a full| 00000530 20 64 65 73 63 72 69 70 74 69 6f 6e 20 6f 66 20 | description of | 00000540 74 68 65 0d 72 6f 75 74 69 6e 65 73 20 65 74 63 |the.routines etc| 00000550 2e 20 69 6e 63 6c 75 64 65 64 20 69 6e 20 74 68 |. included in th| 00000560 69 73 20 61 72 74 69 63 6c 65 2c 20 77 68 69 63 |is article, whic| 00000570 68 20 6d 61 79 20 68 65 6c 70 20 73 6f 6d 65 6f |h may help someo| 00000580 6e 65 20 74 6f 20 77 72 69 74 65 20 61 0d 73 79 |ne to write a.sy| 00000590 73 74 65 6d 20 6f 66 20 74 68 65 72 65 20 6f 77 |stem of there ow| 000005a0 6e 2e 0d 0d 57 48 41 54 20 44 41 54 41 42 41 53 |n...WHAT DATABAS| 000005b0 45 20 44 4f 45 53 20 3a 0d 0d 41 73 20 74 68 65 |E DOES :..As the| 000005c0 20 6e 61 6d 65 20 73 75 67 67 65 73 74 73 2c 20 | name suggests, | 000005d0 74 68 69 73 20 70 72 6f 67 72 61 6d 20 69 73 20 |this program is | 000005e0 61 20 64 61 74 61 20 62 61 73 65 20 74 68 61 74 |a data base that| 000005f0 20 65 6e 61 62 6c 65 73 20 70 69 65 63 65 73 20 | enables pieces | 00000600 6f 66 0d 64 61 74 61 20 74 6f 20 62 65 20 73 61 |of.data to be sa| 00000610 76 65 64 20 61 6e 64 20 72 65 63 61 6c 6c 65 64 |ved and recalled| 00000620 20 61 6e 64 2c 20 6f 6e 63 65 20 65 6e 74 65 72 | and, once enter| 00000630 65 64 2c 20 74 68 69 73 20 64 61 74 61 20 63 61 |ed, this data ca| 00000640 6e 20 62 65 0d 70 72 6f 63 65 73 73 65 64 20 69 |n be.processed i| 00000650 6e 20 6d 61 6e 79 20 64 69 66 66 65 72 65 6e 74 |n many different| 00000660 20 77 61 79 73 20 74 68 61 74 20 61 72 65 20 64 | ways that are d| 00000670 65 73 63 72 69 62 65 64 20 6c 61 74 65 72 2e 20 |escribed later. | 00000680 54 68 65 20 74 79 70 65 73 20 6f 66 0d 64 61 74 |The types of.dat| 00000690 61 20 65 6e 74 65 72 65 64 20 61 72 65 20 75 70 |a entered are up| 000006a0 20 74 6f 20 79 6f 75 2c 20 62 75 74 20 66 6f 72 | to you, but for| 000006b0 20 65 78 61 6d 70 6c 65 20 74 68 65 20 73 79 73 | example the sys| 000006c0 74 65 6d 20 63 6f 75 6c 64 20 68 6f 6c 64 20 6e |tem could hold n| 000006d0 61 6d 65 73 2c 0d 61 64 64 72 65 73 73 65 73 20 |ames,.addresses | 000006e0 61 6e 64 20 70 68 6f 6e 65 20 6e 75 6d 62 65 72 |and phone number| 000006f0 73 2c 20 77 68 69 63 68 20 63 6f 75 6c 64 20 74 |s, which could t| 00000700 68 65 6e 20 62 65 20 72 65 63 61 6c 6c 65 64 20 |hen be recalled | 00000710 77 68 65 6e 65 76 65 72 20 79 6f 75 0d 77 61 6e |whenever you.wan| 00000720 74 2e 20 42 65 66 6f 72 65 20 67 6f 69 6e 67 20 |t. 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The. record ad| 000014f0 64 65 64 20 69 73 20 70 6c 61 63 65 64 20 61 74 |ded is placed at| 00001500 20 74 68 65 20 65 6e 64 20 6f 66 20 74 68 65 20 | the end of the | 00001510 66 69 6c 65 2e 0d 42 41 43 4b 20 57 68 65 6e 65 |file..BACK Whene| 00001520 76 65 72 20 42 20 69 73 20 70 72 65 73 73 65 64 |ver B is pressed| 00001530 2c 20 74 68 65 20 63 75 72 72 65 6e 74 20 72 65 |, the current re| 00001540 63 6f 72 64 20 6e 75 6d 62 65 72 20 69 73 20 64 |cord number is d| 00001550 65 63 72 65 6d 65 6e 74 65 64 20 62 79 0d 20 6f |ecremented by. o| 00001560 6e 65 2c 20 73 6f 20 74 68 61 74 20 74 68 65 20 |ne, so that the | 00001570 70 72 65 76 69 6f 75 73 20 72 65 63 6f 72 64 20 |previous record | 00001580 69 73 20 64 69 73 70 6c 61 79 65 64 20 6f 6e 20 |is displayed on | 00001590 74 68 65 20 73 63 72 65 65 6e 2e 20 54 68 69 73 |the screen. This| 000015a0 0d 20 63 6f 6d 6d 61 6e 64 2c 20 61 6c 6f 6e 67 |. command, along| 000015b0 20 77 69 74 68 20 28 46 29 20 46 4f 52 57 41 52 | with (F) FORWAR| 000015c0 44 2c 20 65 6e 61 62 6c 65 73 20 74 68 65 20 66 |D, enables the f| 000015d0 69 6c 65 20 74 6f 20 62 65 20 73 63 61 6e 6e 65 |ile to be scanne| 000015e0 64 20 74 68 72 6f 75 67 68 2c 0d 20 61 20 72 65 |d through,. a re| 000015f0 63 6f 72 64 20 61 74 20 61 20 74 69 6d 65 2e 0d |cord at a time..| 00001600 44 45 4c 45 54 45 20 54 68 69 73 20 77 69 6c 6c |DELETE This will| 00001610 20 64 65 6c 65 74 65 20 74 68 65 20 72 65 63 6f | delete the reco| 00001620 72 64 20 63 75 72 72 65 6e 74 20 62 65 69 6e 67 |rd current being| 00001630 20 64 69 73 70 6c 61 79 65 64 20 6f 6e 20 74 68 | displayed on th| 00001640 65 20 73 63 72 65 65 6e 2c 0d 20 61 66 74 65 72 |e screen,. after| 00001650 77 68 69 63 68 20 74 68 65 20 66 69 6c 65 20 77 |which the file w| 00001660 69 6c 6c 20 62 65 20 63 6f 6d 70 61 63 74 65 64 |ill be compacted| 00001670 2e 20 42 65 63 61 75 73 65 20 74 68 69 73 20 63 |. Because this c| 00001680 6f 6d 6d 6d 61 6e 64 20 69 73 0d 20 69 72 72 65 |ommmand is. irre| 00001690 76 65 72 73 61 62 6c 65 20 69 6e 20 69 74 73 20 |versable in its | 000016a0 65 66 66 65 63 74 2c 20 79 6f 75 20 61 72 65 20 |effect, you are | 000016b0 66 69 72 73 74 20 61 73 6b 65 64 20 69 66 20 79 |first asked if y| 000016c0 6f 75 20 72 65 61 6c 6c 79 20 77 61 6e 74 20 74 |ou really want t| 000016d0 6f 20 67 6f 0d 20 61 68 65 61 64 20 61 6e 64 20 |o go. ahead and | 000016e0 64 65 6c 65 74 65 20 74 68 65 20 72 65 63 6f 72 |delete the recor| 000016f0 64 2e 0d 45 44 49 54 20 54 68 69 73 20 63 6f 6d |d..EDIT This com| 00001700 6d 61 6e 64 20 77 69 6c 6c 20 65 6e 61 62 6c 65 |mand will enable| 00001710 20 74 68 65 20 64 69 73 70 6c 61 79 65 64 20 72 | the displayed r| 00001720 65 63 6f 72 64 20 74 6f 20 62 65 20 65 64 69 74 |ecord to be edit| 00001730 65 64 2c 20 65 6e 61 62 6c 69 6e 67 0d 20 6d 69 |ed, enabling. mi| 00001740 73 74 61 6b 65 73 20 65 74 63 2e 20 74 6f 20 62 |stakes etc. to b| 00001750 65 20 63 6f 72 72 65 63 74 65 64 2e 0d 46 4f 52 |e corrected..FOR| 00001760 57 41 52 44 20 45 6e 61 62 6c 65 73 20 74 68 65 |WARD Enables the| 00001770 20 72 65 63 6f 72 64 73 20 74 6f 20 62 65 20 73 | records to be s| 00001780 63 61 6e 6e 65 64 20 69 6e 20 61 20 66 6f 72 77 |canned in a forw| 00001790 61 72 64 20 64 69 72 65 63 74 69 6f 6e 20 28 73 |ard direction (s| 000017a0 65 65 0d 20 42 41 43 4b 29 2e 0d 48 45 4c 50 20 |ee. BACK)..HELP | 000017b0 54 68 69 73 20 63 6f 6d 6d 61 6e 64 20 69 73 20 |This command is | 000017c0 76 65 72 79 20 75 73 65 66 75 6c 6c 20 62 65 63 |very usefull bec| 000017d0 61 75 73 65 20 69 74 20 67 69 76 65 73 20 61 20 |ause it gives a | 000017e0 73 75 6d 6d 61 72 79 20 6f 66 20 61 6c 6c 20 74 |summary of all t| 000017f0 68 65 0d 20 63 6f 6d 6d 61 6e 64 73 20 61 6e 64 |he. commands and| 00001800 20 77 68 61 74 20 74 68 65 79 20 64 6f 2e 0d 4b | what they do..K| 00001810 45 45 50 20 52 65 73 75 6c 74 73 20 69 6e 20 74 |EEP Results in t| 00001820 68 65 20 64 61 74 61 20 66 69 6c 65 20 69 6e 20 |he data file in | 00001830 6d 65 6d 6f 72 79 20 62 65 69 6e 67 20 73 61 76 |memory being sav| 00001840 65 64 20 74 6f 20 74 68 65 20 63 75 72 72 65 6e |ed to the curren| 00001850 74 6c 79 0d 20 61 63 74 69 76 65 20 66 69 6c 69 |tly. active fili| 00001860 6e 67 20 73 79 73 74 65 6d 2c 20 77 68 69 63 68 |ng system, which| 00001870 20 63 61 6e 20 74 68 65 6e 20 62 65 20 6c 6f 61 | can then be loa| 00001880 64 65 64 20 69 6e 20 75 73 69 6e 67 20 4c 4f 41 |ded in using LOA| 00001890 44 2e 0d 20 4c 4f 41 44 20 45 6e 61 62 6c 65 73 |D.. LOAD Enables| 000018a0 20 61 20 70 72 65 76 69 6f 75 73 6c 79 20 73 61 | a previously sa| 000018b0 76 65 64 20 66 69 6c 65 20 74 6f 20 62 65 20 6c |ved file to be l| 000018c0 6f 61 64 65 64 20 69 6e 20 66 72 6f 6d 20 61 20 |oaded in from a | 000018d0 66 69 6c 69 6e 67 0d 20 73 79 73 74 65 6d 2e 20 |filing. system. | 000018e0 41 66 74 65 72 20 74 79 70 69 6e 67 20 69 6e 20 |After typing in | 000018f0 74 68 65 20 66 69 6c 65 6e 61 6d 65 20 6f 66 20 |the filename of | 00001900 74 68 65 20 64 61 74 61 20 66 69 6c 65 2c 20 79 |the data file, y| 00001910 6f 75 20 77 69 6c 6c 20 61 6c 73 6f 20 68 61 76 |ou will also hav| 00001920 65 0d 20 74 6f 20 74 79 70 65 20 69 6e 20 74 68 |e. to type in th| 00001930 65 20 70 61 73 73 77 6f 72 64 20 74 68 61 74 20 |e password that | 00001940 68 61 73 20 70 72 65 76 69 6f 75 73 6c 79 20 62 |has previously b| 00001950 65 65 6e 20 67 69 76 65 6e 20 74 6f 20 74 68 65 |een given to the| 00001960 20 66 69 6c 65 2c 20 61 6e 64 0d 20 6f 6e 6c 79 | file, and. only| 00001970 20 77 68 65 6e 20 74 68 65 20 63 6f 72 72 65 63 | when the correc| 00001980 74 20 70 61 73 73 77 6f 72 64 20 68 61 73 20 62 |t password has b| 00001990 65 65 6e 20 65 6e 74 65 72 65 64 20 77 69 6c 6c |een entered will| 000019a0 20 74 68 65 20 72 65 73 74 20 6f 66 20 74 68 65 | the rest of the| 000019b0 20 66 69 6c 65 0d 20 62 65 20 6c 6f 61 64 65 64 | file. be loaded| 000019c0 20 69 6e 2e 20 57 68 65 6e 20 74 79 70 69 6e 67 | in. When typing| 000019d0 20 69 6e 20 74 68 65 20 70 61 73 73 77 6f 72 64 | in the password| 000019e0 2c 20 69 74 20 77 69 6c 6c 20 6e 6f 74 20 62 65 |, it will not be| 000019f0 20 70 72 69 6e 74 65 64 20 75 70 20 6f 6e 0d 20 | printed up on. | 00001a00 74 68 65 20 73 63 72 65 65 6e 20 73 6f 20 61 73 |the screen so as| 00001a10 20 74 6f 20 70 72 65 76 65 6e 74 20 61 6e 79 6f | to prevent anyo| 00001a20 6e 65 20 65 6c 73 65 20 73 65 65 69 6e 67 20 69 |ne else seeing i| 00001a30 74 21 20 49 66 20 61 6e 20 61 74 74 65 6d 70 74 |t! If an attempt| 00001a40 20 69 73 20 6d 61 64 65 0d 20 74 6f 20 6c 6f 61 | is made. to loa| 00001a50 64 20 61 20 64 61 74 61 20 66 69 6c 65 20 74 68 |d a data file th| 00001a60 61 74 20 77 61 73 20 6e 6f 74 20 63 72 65 61 74 |at was not creat| 00001a70 65 64 20 62 79 20 44 41 54 41 42 41 53 45 2c 20 |ed by DATABASE, | 00001a80 74 68 65 20 66 69 6c 65 20 77 69 6c 6c 20 62 65 |the file will be| 00001a90 0d 20 72 65 6a 65 63 74 65 64 2e 0d 4e 45 57 20 |. rejected..NEW | 00001aa0 54 68 69 73 20 63 6f 6d 6d 61 6e 64 20 65 6e 61 |This command ena| 00001ab0 62 6c 65 73 20 61 20 6e 65 77 20 66 69 6c 65 20 |bles a new file | 00001ac0 74 6f 20 62 65 20 63 72 65 61 74 65 64 2c 20 70 |to be created, p| 00001ad0 72 6f 76 69 64 65 64 20 74 68 65 72 65 20 69 73 |rovided there is| 00001ae0 20 6e 6f 74 20 61 0d 20 66 69 6c 65 20 61 6c 72 | not a. file alr| 00001af0 65 61 64 79 20 69 6e 20 6d 65 6d 6f 72 79 20 75 |eady in memory u| 00001b00 70 6f 6e 20 77 68 69 63 68 20 69 74 20 77 69 6c |pon which it wil| 00001b10 6c 20 68 61 76 65 20 74 6f 20 62 65 20 64 65 6c |l have to be del| 00001b20 65 74 65 64 20 75 73 69 6e 67 20 52 45 53 45 54 |eted using RESET| 00001b30 2e 0d 20 57 68 65 6e 20 64 65 66 69 6e 69 6e 67 |.. When defining| 00001b40 20 61 20 66 69 6c 65 2c 20 74 68 65 20 66 69 72 | a file, the fir| 00001b50 73 74 20 74 68 69 6e 67 20 74 68 61 74 20 6d 75 |st thing that mu| 00001b60 73 74 20 62 65 20 64 6f 6e 65 20 69 73 20 74 6f |st be done is to| 00001b70 20 64 65 66 69 6e 65 20 74 68 65 0d 20 66 69 65 | define the. fie| 00001b80 6c 64 20 74 69 74 6c 65 73 2c 20 61 66 74 65 72 |ld titles, after| 00001b90 77 68 69 63 68 20 74 68 65 20 66 69 65 6c 64 20 |which the field | 00001ba0 6c 65 6e 67 74 68 73 20 6d 75 73 74 20 62 65 20 |lengths must be | 00001bb0 65 6e 74 65 72 65 64 2e 20 47 72 65 61 74 20 63 |entered. Great c| 00001bc0 61 72 65 0d 20 6d 75 73 74 20 62 65 20 6d 61 64 |are. must be mad| 00001bd0 65 20 77 68 65 6e 20 64 65 66 69 6e 69 6e 67 20 |e when defining | 00001be0 74 68 65 73 65 20 62 65 63 61 75 73 65 20 74 68 |these because th| 00001bf0 65 79 20 63 61 6e 6e 6f 74 20 62 65 20 6c 61 74 |ey cannot be lat| 00001c00 65 72 20 63 68 61 6e 67 65 64 2e 0d 20 59 6f 75 |er changed.. You| 00001c10 20 73 68 6f 75 6c 64 20 6e 6f 74 20 68 61 76 65 | should not have| 00001c20 20 61 6e 79 20 70 72 6f 62 6c 65 6d 73 20 73 65 | any problems se| 00001c30 74 74 69 6e 67 20 75 70 20 61 20 66 69 6c 65 20 |tting up a file | 00001c40 62 65 63 61 75 73 65 20 74 68 65 20 70 72 6f 67 |because the prog| 00001c50 72 61 6d 0d 20 67 69 76 65 73 20 61 6c 6c 20 74 |ram. gives all t| 00001c60 68 65 20 64 65 74 61 69 6c 73 20 61 62 6f 75 74 |he details about| 00001c70 20 68 6f 77 20 74 6f 20 67 6f 20 61 62 6f 75 74 | how to go about| 00001c80 20 69 74 2e 20 46 69 6e 61 6c 6c 79 20 79 6f 75 | it. Finally you| 00001c90 20 77 69 6c 6c 20 62 65 20 61 73 6b 65 64 0d 20 | will be asked. | 00001ca0 66 6f 72 20 61 20 70 61 73 73 77 6f 72 64 20 74 |for a password t| 00001cb0 68 61 74 20 69 73 20 74 6f 20 67 6f 20 77 69 74 |hat is to go wit| 00001cc0 68 20 74 68 65 20 66 69 6c 65 2c 20 77 68 69 63 |h the file, whic| 00001cd0 68 20 77 69 6c 6c 20 73 74 6f 70 20 61 6e 79 0d |h will stop any.| 00001ce0 20 75 6e 61 74 68 6f 75 72 69 73 65 64 20 70 65 | unathourised pe| 00001cf0 6f 70 6c 65 20 66 72 6f 6d 20 73 65 65 69 6e 67 |ople from seeing| 00001d00 20 79 6f 75 72 20 69 6e 66 6f 2e 2e 20 28 62 75 | your info.. (bu| 00001d10 74 20 6d 61 6b 65 20 73 75 72 65 20 79 6f 75 20 |t make sure you | 00001d20 72 65 6d 65 6d 62 65 72 0d 20 74 68 65 20 70 61 |remember. the pa| 00001d30 73 73 77 6f 72 64 20 6f 72 20 79 6f 75 20 77 6f |ssword or you wo| 00001d40 6e 27 74 20 62 65 20 61 62 6c 65 20 74 6f 20 73 |n't be able to s| 00001d50 65 65 20 79 6f 75 72 20 66 69 6c 65 20 65 69 74 |ee your file eit| 00001d60 68 65 72 21 29 2e 0d 4f 52 44 45 52 20 54 68 69 |her!)..ORDER Thi| 00001d70 73 20 63 61 6e 20 73 77 61 70 20 74 77 6f 20 72 |s can swap two r| 00001d80 65 63 6f 72 64 73 20 77 69 74 68 20 65 61 63 68 |ecords with each| 00001d90 20 6f 74 68 65 72 2c 20 77 68 69 63 68 20 65 6e | other, which en| 00001da0 61 62 6c 65 73 20 79 6f 75 20 74 6f 20 6d 6f 76 |ables you to mov| 00001db0 65 0d 20 74 68 65 20 72 65 63 6f 72 64 73 20 61 |e. the records a| 00001dc0 72 6f 75 6e 64 20 74 68 65 20 66 69 6c 65 20 73 |round the file s| 00001dd0 6f 20 61 73 20 74 6f 20 70 75 74 20 74 68 65 6d |o as to put them| 00001de0 20 69 6e 20 74 68 65 20 6f 72 64 65 72 20 79 6f | in the order yo| 00001df0 75 20 77 61 6e 74 20 74 68 65 6d 2e 0d 20 57 68 |u want them.. Wh| 00001e00 65 6e 20 79 6f 75 20 75 73 65 20 74 68 65 20 63 |en you use the c| 00001e10 6f 6d 6d 61 6e 64 2c 20 79 6f 75 20 77 69 6c 6c |ommand, you will| 00001e20 20 62 65 20 61 73 6b 65 64 20 66 6f 72 20 74 77 | be asked for tw| 00001e30 6f 20 72 65 63 6f 72 64 20 6e 75 6d 62 65 72 73 |o record numbers| 00001e40 2c 20 77 68 69 63 68 0d 20 61 72 65 20 74 68 65 |, which. are the| 00001e50 20 74 77 6f 20 74 6f 20 62 65 20 73 77 61 70 70 | two to be swapp| 00001e60 65 64 2e 0d 2a 4f 53 20 54 6f 20 61 63 63 65 73 |ed..*OS To acces| 00001e70 73 20 74 68 69 73 20 63 6f 6d 6d 61 6e 64 20 73 |s this command s| 00001e80 69 6d 70 6c 79 20 6b 65 65 70 20 53 48 49 46 54 |imply keep SHIFT| 00001e90 20 70 72 65 73 73 65 64 20 61 6e 64 20 74 68 65 | pressed and the| 00001ea0 6e 20 68 69 74 20 74 68 65 20 2a 0d 20 6b 65 79 |n hit the *. key| 00001eb0 2e 20 41 20 2a 20 77 69 6c 6c 20 74 68 65 6e 20 |. A * will then | 00001ec0 63 6f 6d 65 20 6f 6e 74 6f 20 74 68 65 20 73 63 |come onto the sc| 00001ed0 72 65 65 6e 2c 20 61 66 74 65 72 77 68 69 63 68 |reen, afterwhich| 00001ee0 20 79 6f 75 20 63 61 6e 20 65 6e 74 65 72 20 79 | you can enter y| 00001ef0 6f 75 72 0d 20 6f 70 65 72 61 74 69 6e 67 20 73 |our. operating s| 00001f00 79 73 74 65 6d 20 63 6f 6d 6d 61 6e 64 2e 20 54 |ystem command. T| 00001f10 68 69 73 20 65 6e 61 62 6c 65 73 20 79 6f 75 20 |his enables you | 00001f20 74 6f 20 64 6f 20 74 68 69 6e 67 73 20 73 75 63 |to do things suc| 00001f30 68 20 61 73 0d 20 63 61 74 61 6c 6f 67 69 6e 67 |h as. cataloging| 00001f40 20 61 20 64 69 73 63 20 28 2a 43 41 54 29 2c 20 | a disc (*CAT), | 00001f50 6f 72 20 73 65 6c 65 63 74 69 6e 67 20 61 20 66 |or selecting a f| 00001f60 69 6c 69 6e 67 20 73 79 73 74 65 6d 20 28 2a 44 |iling system (*D| 00001f70 49 53 43 2c 20 2a 54 41 50 45 0d 20 65 74 63 29 |ISC, *TAPE. etc)| 00001f80 2e 20 46 6f 72 20 6d 6f 72 65 20 64 65 74 61 69 |. For more detai| 00001f90 6c 73 20 6f 66 20 6f 70 65 72 61 74 69 6e 67 20 |ls of operating | 00001fa0 73 79 73 74 65 6d 20 63 6f 6d 6d 61 6e 64 73 2c |system commands,| 00001fb0 20 73 65 65 20 70 61 67 65 20 34 31 36 20 6f 66 | see page 416 of| 00001fc0 20 74 68 65 0d 20 75 73 65 72 20 67 75 69 64 65 | the. user guide| 00001fd0 2e 0d 50 52 49 4e 54 20 49 66 20 61 20 70 72 69 |..PRINT If a pri| 00001fe0 6e 74 65 72 20 69 73 20 63 6f 6e 6e 65 63 74 65 |nter is connecte| 00001ff0 64 20 74 6f 20 79 6f 75 72 20 63 6f 6d 70 75 74 |d to your comput| 00002000 65 72 20 79 6f 75 20 77 69 6c 6c 20 62 65 20 61 |er you will be a| 00002010 62 6c 65 20 74 6f 20 67 65 74 20 61 0d 20 68 61 |ble to get a. ha| 00002020 72 64 20 63 6f 70 79 20 6f 66 20 61 20 73 69 6e |rd copy of a sin| 00002030 67 6c 65 20 72 65 63 6f 72 64 2c 20 6f 72 20 74 |gle record, or t| 00002040 68 65 20 77 68 6f 6c 65 20 66 69 6c 65 2e 20 57 |he whole file. W| 00002050 68 65 6e 20 70 72 69 6e 74 69 6e 67 20 6f 75 74 |hen printing out| 00002060 20 61 6c 6c 0d 20 74 68 65 20 72 65 63 6f 72 64 | all. the record| 00002070 73 2c 20 79 6f 75 20 77 69 6c 6c 20 62 65 20 61 |s, you will be a| 00002080 73 6b 65 64 20 66 6f 72 20 61 6e 20 69 6e 74 65 |sked for an inte| 00002090 72 2d 72 65 63 6f 72 64 20 73 70 61 63 65 20 63 |r-record space c| 000020a0 68 61 72 61 63 74 65 72 20 77 68 69 63 68 0d 20 |haracter which. | 000020b0 77 69 6c 6c 20 62 65 20 70 72 69 6e 74 65 64 20 |will be printed | 000020c0 69 6e 20 61 20 6c 6f 6e 67 20 6c 69 6e 65 20 74 |in a long line t| 000020d0 6f 20 73 65 70 65 72 61 74 65 20 65 61 63 68 20 |o seperate each | 000020e0 72 65 63 6f 72 64 20 6f 6e 20 74 68 65 20 70 61 |record on the pa| 000020f0 70 65 72 20 28 61 0d 20 73 75 69 74 61 62 6c 65 |per (a. suitable| 00002100 20 63 68 61 72 61 63 74 65 72 20 69 73 20 61 20 | character is a | 00002110 27 2d 27 29 2e 0d 52 45 53 45 54 20 57 68 65 6e |'-')..RESET When| 00002120 20 79 6f 75 20 70 72 65 73 73 20 27 52 27 20 74 | you press 'R' t| 00002130 68 69 73 20 77 69 70 65 73 20 74 68 65 20 6d 65 |his wipes the me| 00002140 6d 6f 72 79 20 77 68 65 72 65 20 74 68 65 20 63 |mory where the c| 00002150 75 72 72 65 6e 74 20 66 69 6c 65 0d 20 69 73 20 |urrent file. is | 00002160 73 74 6f 72 65 64 2c 20 74 68 75 73 20 77 69 70 |stored, thus wip| 00002170 69 6e 67 20 6f 75 74 20 74 68 65 20 66 69 6c 65 |ing out the file| 00002180 2e 20 55 73 65 20 74 68 69 73 20 63 6f 6d 6d 61 |. Use this comma| 00002190 6e 64 20 63 61 72 65 66 75 6c 6c 79 2c 20 61 6e |nd carefully, an| 000021a0 64 0d 20 6d 61 6b 65 20 73 75 72 65 20 74 68 61 |d. make sure tha| 000021b0 74 20 79 6f 75 20 68 61 76 65 20 73 61 76 65 64 |t you have saved| 000021c0 20 74 68 65 20 66 69 6c 65 20 62 65 66 6f 72 65 | the file before| 000021d0 20 75 73 69 6e 67 20 52 45 53 45 54 2e 0d 53 45 | using RESET..SE| 000021e0 41 52 43 48 20 54 68 69 73 20 63 6f 6d 6d 61 6e |ARCH This comman| 000021f0 64 20 65 6e 61 62 6c 65 73 20 79 6f 75 20 74 6f |d enables you to| 00002200 20 66 69 6e 64 20 61 20 72 65 63 6f 72 64 20 71 | find a record q| 00002210 75 69 63 6b 6c 79 20 62 79 20 61 73 6b 69 6e 67 |uickly by asking| 00002220 20 66 6f 72 0d 20 61 20 73 65 61 72 63 68 20 72 | for. a search r| 00002230 65 63 6f 72 64 2c 20 61 66 74 65 72 77 68 69 63 |ecord, afterwhic| 00002240 68 20 69 74 20 77 69 6c 6c 20 73 65 61 72 63 68 |h it will search| 00002250 20 74 68 65 20 66 69 6c 65 20 66 6f 72 20 61 6e | the file for an| 00002260 6f 74 68 65 72 0d 20 72 65 63 6f 72 64 20 74 68 |other. record th| 00002270 61 74 20 69 73 20 74 68 65 20 63 6c 6f 73 65 73 |at is the closes| 00002280 74 20 6d 61 74 63 68 2e 20 55 70 6f 6e 20 64 65 |t match. Upon de| 00002290 63 69 64 69 6e 67 20 77 68 69 63 68 20 69 73 20 |ciding which is | 000022a0 74 68 65 20 62 65 73 74 0d 20 62 65 74 2c 20 69 |the best. bet, i| 000022b0 74 20 77 69 6c 6c 20 70 72 69 6e 74 20 6f 75 74 |t will print out| 000022c0 20 74 68 65 20 63 6c 6f 73 65 73 74 20 6d 61 74 | the closest mat| 000022d0 63 68 69 6e 67 20 72 65 63 6f 72 64 2e 20 53 6f |ching record. 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JA| 00004510 4e 20 31 39 38 37 2e 20 0d |N 1987. .| 00004519
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