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DBTXT
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 » telesoftware1.adl |
| Filename: | DBTXT |
| Read OK: | ✔ |
| File size: | 5516 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.
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A DATA-BASE SYSTEM by ROB ANDERSON.
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
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A DATA-BASE SYSTEM by ROB ANDERSON.
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
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A DATA-BASE SYSTEM by ROB ANDERSON.
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).
Page 4
A DATA-BASE SYSTEM by ROB ANDERSON.
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.
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A DATA-BASE SYSTEM by ROB ANDERSON.
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 '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
Page 6
A DATA-BASE SYSTEM by ROB ANDERSON.
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 .
. .
_________________ E 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
Page 7
A DATA-BASE SYSTEM by ROB ANDERSON.
'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.
Page 8
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T| 00000060 68 69 73 20 64 61 74 61 20 62 61 73 65 20 70 72 |his data base pr| 00000070 6f 67 72 61 6d 20 65 6e 61 62 6c 65 73 20 61 20 |ogram enables a | 00000080 63 6f 6c 6c 65 63 74 69 6f 6e 20 6f 66 20 72 65 |collection of re| 00000090 63 6f 72 64 73 20 28 6f 66 20 61 6e 79 20 0d 20 |cords (of any . | 000000a0 20 20 20 66 6f 72 6d 61 74 29 20 74 6f 20 62 65 | format) to be| 000000b0 20 70 72 6f 63 65 73 73 65 64 20 69 6e 20 61 20 | processed in a | 000000c0 76 61 72 69 65 74 79 20 6f 66 20 77 61 79 73 2c |variety of ways,| 000000d0 20 61 6e 64 20 73 68 6f 75 6c 64 20 70 72 6f 76 | and should prov| 000000e0 69 64 65 20 61 20 0d 20 20 20 20 67 6f 6f 64 20 |ide a . good | 000000f0 69 6e 74 72 6f 64 75 63 74 69 6f 6e 20 69 6e 74 |introduction int| 00000100 6f 20 74 68 65 20 75 73 65 20 6f 66 20 64 61 74 |o the use of dat| 00000110 61 2d 62 61 73 65 20 73 79 73 74 65 6d 73 20 69 |a-base systems i| 00000120 6e 20 67 65 6e 65 72 61 6c 2e 20 42 79 20 0d 20 |n general. By . | 00000130 20 20 20 66 6f 6c 6c 6f 77 69 6e 67 20 74 68 65 | following the| 00000140 20 42 41 53 49 43 20 70 72 6f 67 72 61 6d 20 6c | BASIC program l| 00000150 69 73 74 69 6e 67 20 69 74 20 73 68 6f 75 6c 64 |isting it should| 00000160 20 61 6c 73 6f 20 67 69 76 65 20 74 68 65 20 72 | also give the r| 00000170 65 61 64 65 72 20 61 6e 20 0d 20 20 20 20 69 6e |eader an . in| 00000180 73 69 67 68 74 20 69 6e 74 6f 20 68 6f 77 20 73 |sight into how s| 00000190 75 63 68 20 61 20 73 79 73 74 65 6d 20 77 6f 72 |uch a system wor| 000001a0 6b 73 2c 20 61 6e 64 20 75 6c 74 69 6d 61 74 65 |ks, and ultimate| 000001b0 6c 79 20 68 6f 77 20 74 6f 20 67 6f 20 61 62 6f |ly how to go abo| 000001c0 75 74 20 0d 20 20 20 20 77 72 69 74 69 6e 67 20 |ut . writing | 000001d0 61 20 73 79 73 74 65 6d 20 6f 66 20 79 6f 75 72 |a system of your| 000001e0 20 6f 77 6e 2e 20 0d 20 20 20 20 20 0d 20 20 20 | own. . . | 000001f0 20 20 20 20 20 20 54 68 65 20 61 63 74 75 61 6c | The actual| 00000200 20 64 61 74 61 20 74 68 61 74 20 67 6f 65 73 20 | data that goes | 00000210 74 6f 20 6d 61 6b 65 20 75 70 20 74 68 65 20 64 |to make up the d| 00000220 61 74 61 2d 66 69 6c 65 20 69 73 20 68 65 6c 64 |ata-file is held| 00000230 20 69 6e 20 0d 20 20 20 20 63 6f 6d 70 75 74 65 | in . compute| 00000240 72 20 6d 65 6d 6f 72 79 2c 20 77 68 69 63 68 20 |r memory, which | 00000250 64 6f 65 73 20 72 65 73 74 72 69 63 74 20 74 68 |does restrict th| 00000260 65 20 61 6d 6f 75 6e 74 20 6f 66 20 64 61 74 61 |e amount of data| 00000270 20 74 68 61 74 20 63 61 6e 20 62 65 20 0d 20 20 | that can be . | 00000280 20 20 73 74 6f 72 65 64 20 69 6e 20 6f 6e 65 20 | stored in one | 00000290 66 69 6c 65 2c 20 62 75 74 20 62 79 20 75 73 69 |file, but by usi| 000002a0 6e 67 20 74 68 69 73 20 6d 65 74 68 6f 64 20 76 |ng this method v| 000002b0 65 72 79 20 66 61 73 74 20 61 63 63 65 73 73 20 |ery fast access | 000002c0 74 69 6d 65 73 20 74 6f 20 0d 20 20 20 20 74 68 |times to . th| 000002d0 65 20 64 61 74 61 20 61 72 65 20 61 63 68 69 65 |e data are achie| 000002e0 76 65 64 20 28 65 2e 67 2e 20 77 69 74 68 20 73 |ved (e.g. with s| 000002f0 65 61 72 63 68 65 73 20 65 74 63 2e 29 2c 20 61 |earches etc.), a| 00000300 6e 64 20 69 74 20 61 6c 73 6f 20 70 72 6f 76 69 |nd it also provi| 00000310 64 65 73 20 0d 20 20 20 20 61 20 67 6f 6f 64 20 |des . a good | 00000320 77 61 79 20 66 6f 72 20 74 61 70 65 20 75 73 65 |way for tape use| 00000330 72 73 20 74 6f 20 73 74 6f 72 65 20 61 20 72 65 |rs to store a re| 00000340 61 73 6f 6e 61 62 6c 65 20 61 6d 6f 75 6e 74 20 |asonable amount | 00000350 6f 66 20 72 65 63 6f 72 64 73 20 0d 20 20 20 20 |of records . | 00000360 77 69 74 68 6f 75 74 20 68 61 76 69 6e 67 20 74 |without having t| 00000370 6f 20 77 61 69 74 20 61 20 6c 6f 6e 67 20 74 69 |o wait a long ti| 00000380 6d 65 20 66 6f 72 20 69 74 20 61 6c 6c 20 74 6f |me for it all to| 00000390 20 6c 6f 61 64 2e 20 0d 20 20 20 20 20 0d 20 20 | load. . . | 000003a0 20 20 20 20 20 20 20 54 68 75 73 2c 20 69 6e 20 | Thus, in | 000003b0 73 75 6d 6d 61 72 79 2c 20 74 68 69 73 20 73 79 |summary, this sy| 000003c0 73 74 65 6d 20 63 6f 75 6c 64 20 62 65 20 6f 66 |stem could be of| 000003d0 20 75 73 65 20 74 6f 20 3a 20 0d 20 20 20 20 20 | use to : . | 000003e0 0d 20 20 20 20 20 20 20 20 20 69 29 20 54 61 70 |. i) Tap| 000003f0 65 20 61 6e 64 20 64 69 73 63 20 75 73 65 72 73 |e and disc users| 00000400 20 77 68 6f 20 72 65 71 75 69 72 65 20 61 20 73 | who require a s| 00000410 6d 61 6c 6c 20 62 75 74 20 66 61 73 74 20 64 61 |mall but fast da| 00000420 74 61 2d 62 61 73 65 20 0d 20 20 20 20 73 79 73 |ta-base . sys| 00000430 74 65 6d 20 74 6f 20 73 74 6f 72 65 20 66 6f 72 |tem to store for| 00000440 20 65 78 61 6d 70 6c 65 20 6e 61 6d 65 73 2c 20 | example names, | 00000450 61 64 64 72 65 73 73 65 73 20 61 6e 64 20 74 65 |addresses and te| 00000460 6c 65 70 68 6f 6e 65 20 6e 75 6d 62 65 72 73 2c |lephone numbers,| 00000470 20 6f 66 20 0d 20 20 20 20 77 68 69 63 68 20 72 | of . which r| 00000480 6f 75 67 68 6c 79 20 32 30 30 20 6e 61 6d 65 73 |oughly 200 names| 00000490 20 65 74 63 20 6d 61 79 20 62 65 20 73 74 6f 72 | etc may be stor| 000004a0 65 64 20 75 73 69 6e 67 20 61 20 72 65 61 73 6f |ed using a reaso| 000004b0 6e 61 62 6c 79 20 73 69 7a 65 64 20 0d 20 20 20 |nably sized . | 000004c0 20 72 65 63 6f 72 64 20 66 6f 72 6d 61 74 2e 20 | record format. | 000004d0 0d 20 20 20 20 20 0d 20 20 20 20 20 20 20 20 20 |. . | 000004e0 69 69 29 20 53 6f 6d 65 6f 6e 65 20 77 68 6f 20 |ii) Someone who | 000004f0 68 61 73 20 6e 65 76 65 72 20 75 73 65 64 20 61 |has never used a| 00000500 20 64 61 74 61 2d 62 61 73 65 20 73 79 73 74 65 | data-base syste| 00000510 6d 20 62 65 66 6f 72 65 2c 20 61 6e 64 20 69 73 |m before, and is| 00000520 20 0d 20 20 20 20 77 61 6e 74 69 6e 67 20 73 6f | . wanting so| 00000530 6d 65 20 65 78 70 65 72 69 65 6e 63 65 20 77 69 |me experience wi| 00000540 74 68 20 61 20 73 6d 61 6c 6c 20 73 79 73 74 65 |th a small syste| 00000550 6d 20 73 6f 20 61 73 20 74 6f 20 6f 62 74 61 69 |m so as to obtai| 00000560 6e 20 61 20 62 65 74 74 65 72 20 0d 20 20 20 20 |n a better . | 00000570 75 6e 64 65 72 73 74 61 6e 64 69 6e 67 20 6f 66 |understanding of| 00000580 20 74 68 65 20 62 61 73 69 63 20 70 72 69 6e 63 | the basic princ| 00000590 69 70 6c 65 73 20 69 6e 76 6f 6c 76 65 64 2e 20 |iples involved. | 000005a0 0d 20 20 20 20 20 0d 20 20 20 20 20 20 20 20 20 |. . | 000005b0 69 69 69 29 20 46 72 6f 6d 20 74 68 65 20 70 72 |iii) From the pr| 000005c0 6f 67 72 61 6d 6d 69 6e 67 20 70 6f 69 6e 74 20 |ogramming point | 000005d0 6f 66 20 76 69 65 77 20 74 68 65 72 65 20 69 73 |of view there is| 000005e0 20 61 20 66 75 6c 6c 20 0d 20 20 20 20 64 65 73 | a full . des| 000005f0 63 72 69 70 74 69 6f 6e 20 6f 66 20 74 68 65 20 |cription of the | 00000600 72 6f 75 74 69 6e 65 73 20 65 74 63 2e 20 69 6e |routines etc. in| 00000610 63 6c 75 64 65 64 20 69 6e 20 74 68 69 73 20 61 |cluded in this a| 00000620 72 74 69 63 6c 65 2c 20 77 68 69 63 68 20 6d 61 |rticle, which ma| 00000630 79 20 0d 20 20 20 20 68 65 6c 70 20 73 6f 6d 65 |y . help some| 00000640 6f 6e 65 20 74 6f 20 77 72 69 74 65 20 61 20 73 |one to write a s| 00000650 79 73 74 65 6d 20 6f 66 20 74 68 65 72 65 20 6f |ystem of there o| 00000660 77 6e 2e 20 0d 20 20 20 20 20 0d 20 20 20 20 57 |wn. . . W| 00000670 48 41 54 20 44 41 54 41 42 41 53 45 20 44 4f 45 |HAT DATABASE DOE| 00000680 53 20 3a 20 0d 20 20 20 20 20 0d 20 20 20 20 20 |S : . . | 00000690 20 20 20 20 41 73 20 74 68 65 20 6e 61 6d 65 20 | As the name | 000006a0 73 75 67 67 65 73 74 73 2c 20 74 68 69 73 20 70 |suggests, this p| 000006b0 72 6f 67 72 61 6d 20 69 73 20 61 20 64 61 74 61 |rogram is a data| 000006c0 20 62 61 73 65 20 74 68 61 74 20 65 6e 61 62 6c | base that enabl| 000006d0 65 73 20 0d 20 20 20 20 70 69 65 63 65 73 20 6f |es . pieces o| 000006e0 66 20 64 61 74 61 20 74 6f 20 62 65 20 73 61 76 |f data to be sav| 000006f0 65 64 20 61 6e 64 20 72 65 63 61 6c 6c 65 64 20 |ed and recalled | 00000700 61 6e 64 2c 20 6f 6e 63 65 20 65 6e 74 65 72 65 |and, once entere| 00000710 64 2c 20 74 68 69 73 20 64 61 74 61 20 0d 20 20 |d, this data . | 00000720 20 20 63 61 6e 20 62 65 20 70 72 6f 63 65 73 73 | can be process| 00000730 65 64 20 69 6e 20 6d 61 6e 79 20 64 69 66 66 65 |ed in many diffe| 00000740 72 65 6e 74 20 77 61 79 73 20 74 68 61 74 20 61 |rent ways that a| 00000750 72 65 20 64 65 73 63 72 69 62 65 64 20 6c 61 74 |re described lat| 00000760 65 72 2e 20 54 68 65 20 0d 20 20 20 20 74 79 70 |er. 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(R) | 000016d0 52 45 53 45 54 20 20 20 2d 20 72 65 73 65 74 20 |RESET - reset | 000016e0 44 41 54 41 42 41 53 45 2e 20 0d 20 20 20 20 20 |DATABASE. . | 000016f0 20 20 20 20 28 53 29 20 53 45 41 52 43 48 20 20 | (S) SEARCH | 00001700 2d 20 73 65 61 72 63 68 20 66 6f 72 20 61 20 72 |- search for a r| 00001710 65 63 6f 72 64 2e 20 0d 20 20 20 20 20 0d 20 20 |ecord. . . | 00001720 20 20 20 20 20 20 20 41 73 20 6d 65 6e 74 69 6f | As mentio| 00001730 6e 65 64 20 62 65 66 6f 72 65 2c 20 44 41 54 41 |ned before, DATA| 00001740 42 41 53 45 20 69 73 20 76 65 72 79 20 75 73 65 |BASE is very use| 00001750 72 2d 66 72 69 65 6e 64 6c 79 2c 20 61 6e 64 20 |r-friendly, and | 00001760 79 6f 75 20 0d 0d 0d 20 20 20 20 20 20 20 20 20 |you ... | 00001770 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001780 20 20 20 20 20 20 20 20 20 20 20 50 61 67 65 20 | Page | 00001790 32 0d 0d 0d 0d 0d 0d 20 20 20 20 20 20 20 20 20 |2...... | 000017a0 20 20 20 20 20 20 20 20 20 20 20 20 41 20 44 41 | A DA| 000017b0 54 41 2d 42 41 53 45 20 53 59 53 54 45 4d 20 62 |TA-BASE SYSTEM b| 000017c0 79 20 52 4f 42 20 41 4e 44 45 52 53 4f 4e 2e 0d |y ROB ANDERSON..| 000017d0 0d 0d 0d 20 20 20 20 73 68 6f 75 6c 64 20 68 61 |... should ha| 000017e0 76 65 20 6e 6f 20 70 72 6f 62 6c 65 6d 73 20 75 |ve no problems u| 000017f0 73 69 6e 67 20 74 68 65 20 63 6f 6d 6d 61 6e 64 |sing the command| 00001800 73 2c 20 62 75 74 20 69 6e 20 63 61 73 65 20 74 |s, but in case t| 00001810 68 65 72 65 20 61 72 65 20 61 20 0d 20 20 20 20 |here are a . | 00001820 66 65 77 20 70 6f 69 6e 74 73 20 74 68 61 74 20 |few points that | 00001830 61 72 65 20 73 74 69 6c 6c 20 6e 6f 74 20 63 6c |are still not cl| 00001840 65 61 72 20 77 68 65 6e 20 75 73 69 6e 67 20 74 |ear when using t| 00001850 68 65 20 70 72 6f 67 72 61 6d 2c 20 61 6e 20 0d |he program, an .| 00001860 20 20 20 20 65 78 70 6c 61 6e 61 74 69 6f 6e 20 | explanation | 00001870 69 73 20 6e 6f 77 20 67 69 76 65 6e 20 6f 66 20 |is now given of | 00001880 61 6c 6c 20 74 68 65 20 63 6f 6d 6d 61 6e 64 73 |all the commands| 00001890 2e 20 0d 20 20 20 20 20 0d 20 20 20 20 41 44 44 |. . . ADD| 000018a0 20 45 6e 61 62 6c 65 73 20 61 20 72 65 63 6f 72 | Enables a recor| 000018b0 64 20 74 6f 20 62 65 20 61 64 64 65 64 20 74 6f |d to be added to| 000018c0 20 74 68 65 20 64 61 74 61 20 66 69 6c 65 20 63 | the data file c| 000018d0 75 72 72 65 6e 74 6c 79 20 69 6e 20 6d 65 6d 6f |urrently in memo| 000018e0 72 79 2e 20 0d 20 20 20 20 20 20 54 68 65 20 72 |ry. . The r| 000018f0 65 63 6f 72 64 20 61 64 64 65 64 20 69 73 20 70 |ecord added is p| 00001900 6c 61 63 65 64 20 61 74 20 74 68 65 20 65 6e 64 |laced at the end| 00001910 20 6f 66 20 74 68 65 20 66 69 6c 65 2e 20 0d 20 | of the file. . | 00001920 20 20 20 42 41 43 4b 20 57 68 65 6e 65 76 65 72 | BACK Whenever| 00001930 20 42 20 69 73 20 70 72 65 73 73 65 64 2c 20 74 | B is pressed, t| 00001940 68 65 20 63 75 72 72 65 6e 74 20 72 65 63 6f 72 |he current recor| 00001950 64 20 6e 75 6d 62 65 72 20 69 73 20 64 65 63 72 |d number is decr| 00001960 65 6d 65 6e 74 65 64 20 0d 20 20 20 20 20 20 62 |emented . b| 00001970 79 20 6f 6e 65 2c 20 73 6f 20 74 68 61 74 20 74 |y one, so that t| 00001980 68 65 20 70 72 65 76 69 6f 75 73 20 72 65 63 6f |he previous reco| 00001990 72 64 20 69 73 20 64 69 73 70 6c 61 79 65 64 20 |rd is displayed | 000019a0 6f 6e 20 74 68 65 20 73 63 72 65 65 6e 2e 20 54 |on the screen. T| 000019b0 68 69 73 20 0d 20 20 20 20 20 20 63 6f 6d 6d 61 |his . comma| 000019c0 6e 64 2c 20 61 6c 6f 6e 67 20 77 69 74 68 20 28 |nd, along with (| 000019d0 46 29 20 46 4f 52 57 41 52 44 2c 20 65 6e 61 62 |F) FORWARD, enab| 000019e0 6c 65 73 20 74 68 65 20 66 69 6c 65 20 74 6f 20 |les the file to | 000019f0 62 65 20 73 63 61 6e 6e 65 64 20 0d 20 20 20 20 |be scanned . | 00001a00 20 20 74 68 72 6f 75 67 68 2c 20 61 20 72 65 63 | through, a rec| 00001a10 6f 72 64 20 61 74 20 61 20 74 69 6d 65 2e 20 0d |ord at a time. .| 00001a20 20 20 20 20 44 45 4c 45 54 45 20 54 68 69 73 20 | DELETE This | 00001a30 77 69 6c 6c 20 64 65 6c 65 74 65 20 74 68 65 20 |will delete the | 00001a40 72 65 63 6f 72 64 20 63 75 72 72 65 6e 74 20 62 |record current b| 00001a50 65 69 6e 67 20 64 69 73 70 6c 61 79 65 64 20 6f |eing displayed o| 00001a60 6e 20 74 68 65 20 0d 20 20 20 20 20 20 73 63 72 |n the . scr| 00001a70 65 65 6e 2c 20 61 66 74 65 72 77 68 69 63 68 20 |een, afterwhich | 00001a80 74 68 65 20 66 69 6c 65 20 77 69 6c 6c 20 62 65 |the file will be| 00001a90 20 63 6f 6d 70 61 63 74 65 64 2e 20 42 65 63 61 | compacted. Beca| 00001aa0 75 73 65 20 74 68 69 73 20 63 6f 6d 6d 6d 61 6e |use this commman| 00001ab0 64 20 0d 20 20 20 20 20 20 69 73 20 69 72 72 65 |d . is irre| 00001ac0 76 65 72 73 61 62 6c 65 20 69 6e 20 69 74 73 20 |versable in its | 00001ad0 65 66 66 65 63 74 2c 20 79 6f 75 20 61 72 65 20 |effect, you are | 00001ae0 66 69 72 73 74 20 61 73 6b 65 64 20 69 66 20 79 |first asked if y| 00001af0 6f 75 20 72 65 61 6c 6c 79 20 0d 20 20 20 20 20 |ou really . | 00001b00 20 77 61 6e 74 20 74 6f 20 67 6f 20 61 68 65 61 | want to go ahea| 00001b10 64 20 61 6e 64 20 64 65 6c 65 74 65 20 74 68 65 |d and delete the| 00001b20 20 72 65 63 6f 72 64 2e 20 0d 20 20 20 20 45 44 | record. . ED| 00001b30 49 54 20 54 68 69 73 20 63 6f 6d 6d 61 6e 64 20 |IT This command | 00001b40 77 69 6c 6c 20 65 6e 61 62 6c 65 20 74 68 65 20 |will enable the | 00001b50 64 69 73 70 6c 61 79 65 64 20 72 65 63 6f 72 64 |displayed record| 00001b60 20 74 6f 20 62 65 20 65 64 69 74 65 64 2c 20 0d | to be edited, .| 00001b70 20 20 20 20 20 20 65 6e 61 62 6c 69 6e 67 20 6d | enabling m| 00001b80 69 73 74 61 6b 65 73 20 65 74 63 2e 20 74 6f 20 |istakes etc. to | 00001b90 62 65 20 63 6f 72 72 65 63 74 65 64 2e 20 0d 20 |be corrected. . | 00001ba0 20 20 20 46 4f 52 57 41 52 44 20 45 6e 61 62 6c | FORWARD Enabl| 00001bb0 65 73 20 74 68 65 20 72 65 63 6f 72 64 73 20 74 |es the records t| 00001bc0 6f 20 62 65 20 73 63 61 6e 6e 65 64 20 69 6e 20 |o be scanned in | 00001bd0 61 20 66 6f 72 77 61 72 64 20 64 69 72 65 63 74 |a forward direct| 00001be0 69 6f 6e 20 28 73 65 65 20 0d 20 20 20 20 20 20 |ion (see . | 00001bf0 42 41 43 4b 29 2e 20 0d 20 20 20 20 48 45 4c 50 |BACK). . 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Afte| 00001d50 72 20 74 79 70 69 6e 67 20 69 6e 20 74 68 65 20 |r typing in the | 00001d60 66 69 6c 65 6e 61 6d 65 20 6f 66 20 74 68 65 20 |filename of the | 00001d70 64 61 74 61 20 66 69 6c 65 2c 20 79 6f 75 20 77 |data file, you w| 00001d80 69 6c 6c 20 61 6c 73 6f 20 0d 20 20 20 20 20 20 |ill also . | 00001d90 68 61 76 65 20 74 6f 20 74 79 70 65 20 69 6e 20 |have to type in | 00001da0 74 68 65 20 70 61 73 73 77 6f 72 64 20 74 68 61 |the password tha| 00001db0 74 20 68 61 73 20 70 72 65 76 69 6f 75 73 6c 79 |t has previously| 00001dc0 20 62 65 65 6e 20 67 69 76 65 6e 20 74 6f 20 74 | been given to t| 00001dd0 68 65 20 0d 20 20 20 20 20 20 66 69 6c 65 2c 20 |he . file, | 00001de0 61 6e 64 20 6f 6e 6c 79 20 77 68 65 6e 20 74 68 |and only when th| 00001df0 65 20 63 6f 72 72 65 63 74 20 70 61 73 73 77 6f |e correct passwo| 00001e00 72 64 20 68 61 73 20 62 65 65 6e 20 65 6e 74 65 |rd has been ente| 00001e10 72 65 64 20 77 69 6c 6c 20 74 68 65 20 0d 20 20 |red will the . | 00001e20 20 20 20 20 72 65 73 74 20 6f 66 20 74 68 65 20 | rest of the | 00001e30 66 69 6c 65 20 62 65 20 6c 6f 61 64 65 64 20 69 |file be loaded i| 00001e40 6e 2e 20 57 68 65 6e 20 74 79 70 69 6e 67 20 69 |n. When typing i| 00001e50 6e 20 74 68 65 20 70 61 73 73 77 6f 72 64 2c 20 |n the password, | 00001e60 69 74 20 77 69 6c 6c 20 0d 20 20 20 20 20 20 6e |it will . n| 00001e70 6f 74 20 62 65 20 70 72 69 6e 74 65 64 20 75 70 |ot be printed up| 00001e80 20 6f 6e 20 74 68 65 20 73 63 72 65 65 6e 20 73 | on the screen s| 00001e90 6f 20 61 73 20 74 6f 20 70 72 65 76 65 6e 74 20 |o as to prevent | 00001ea0 61 6e 79 6f 6e 65 20 65 6c 73 65 20 73 65 65 69 |anyone else seei| 00001eb0 6e 67 20 0d 20 20 20 20 20 20 69 74 21 20 49 66 |ng . it! If| 00001ec0 20 61 6e 20 61 74 74 65 6d 70 74 20 69 73 20 6d | an attempt is m| 00001ed0 61 64 65 20 74 6f 20 6c 6f 61 64 20 61 20 64 61 |ade to load a da| 00001ee0 74 61 20 66 69 6c 65 20 74 68 61 74 20 77 61 73 |ta file that was| 00001ef0 20 6e 6f 74 20 63 72 65 61 74 65 64 20 0d 20 20 | not created . | 00001f00 20 20 20 20 62 79 20 44 41 54 41 42 41 53 45 2c | by DATABASE,| 00001f10 20 74 68 65 20 66 69 6c 65 20 77 69 6c 6c 20 62 | the file will b| 00001f20 65 20 72 65 6a 65 63 74 65 64 2e 20 0d 20 20 20 |e rejected. . | 00001f30 20 4e 45 57 20 54 68 69 73 20 63 6f 6d 6d 61 6e | NEW This comman| 00001f40 64 20 65 6e 61 62 6c 65 73 20 61 20 6e 65 77 20 |d enables a new | 00001f50 66 69 6c 65 20 74 6f 20 62 65 20 63 72 65 61 74 |file to be creat| 00001f60 65 64 2c 20 70 72 6f 76 69 64 65 64 20 74 68 65 |ed, provided the| 00001f70 72 65 20 69 73 20 0d 20 20 20 20 20 20 6e 6f 74 |re is . not| 00001f80 20 61 20 66 69 6c 65 20 61 6c 72 65 61 64 79 20 | a file already | 00001f90 69 6e 20 6d 65 6d 6f 72 79 20 75 70 6f 6e 20 77 |in memory upon w| 00001fa0 68 69 63 68 20 69 74 20 77 69 6c 6c 20 68 61 76 |hich it will hav| 00001fb0 65 20 74 6f 20 62 65 20 64 65 6c 65 74 65 64 20 |e to be deleted | 00001fc0 0d 20 20 20 20 20 20 75 73 69 6e 67 20 52 45 53 |. using RES| 00001fd0 45 54 2e 20 57 68 65 6e 20 64 65 66 69 6e 69 6e |ET. When definin| 00001fe0 67 20 61 20 66 69 6c 65 2c 20 74 68 65 20 66 69 |g a file, the fi| 00001ff0 72 73 74 20 74 68 69 6e 67 20 74 68 61 74 20 6d |rst thing that m| 00002000 75 73 74 20 62 65 20 64 6f 6e 65 20 0d 20 20 20 |ust be done . | 00002010 20 20 20 69 73 20 74 6f 20 64 65 66 69 6e 65 20 | is to define | 00002020 74 68 65 20 66 69 65 6c 64 20 74 69 74 6c 65 73 |the field titles| 00002030 2c 20 61 66 74 65 72 77 68 69 63 68 20 74 68 65 |, afterwhich the| 00002040 20 66 69 65 6c 64 20 6c 65 6e 67 74 68 73 20 6d | field lengths m| 00002050 75 73 74 20 62 65 20 0d 20 20 20 20 20 20 65 6e |ust be . en| 00002060 74 65 72 65 64 2e 20 47 72 65 61 74 20 63 61 72 |tered. Great car| 00002070 65 20 6d 75 73 74 20 62 65 20 6d 61 64 65 20 77 |e must be made w| 00002080 68 65 6e 20 64 65 66 69 6e 69 6e 67 20 74 68 65 |hen defining the| 00002090 73 65 20 62 65 63 61 75 73 65 20 74 68 65 79 20 |se because they | 000020a0 0d 20 20 20 20 20 20 63 61 6e 6e 6f 74 20 62 65 |. cannot be| 000020b0 20 6c 61 74 65 72 20 63 68 61 6e 67 65 64 2e 20 | later changed. | 000020c0 59 6f 75 20 73 68 6f 75 6c 64 20 6e 6f 74 20 68 |You should not h| 000020d0 61 76 65 20 61 6e 79 20 70 72 6f 62 6c 65 6d 73 |ave any problems| 000020e0 20 73 65 74 74 69 6e 67 20 75 70 20 0d 20 20 20 | setting up . | 000020f0 20 20 20 61 20 66 69 6c 65 20 62 65 63 61 75 73 | a file becaus| 00002100 65 20 74 68 65 20 70 72 6f 67 72 61 6d 20 67 69 |e the program gi| 00002110 76 65 73 20 61 6c 6c 20 74 68 65 20 64 65 74 61 |ves all the deta| 00002120 69 6c 73 20 61 62 6f 75 74 20 68 6f 77 20 74 6f |ils about how to| 00002130 20 67 6f 20 0d 20 20 20 20 20 20 61 62 6f 75 74 | go . about| 00002140 20 69 74 2e 20 46 69 6e 61 6c 6c 79 20 79 6f 75 | it. Finally you| 00002150 20 77 69 6c 6c 20 62 65 20 61 73 6b 65 64 20 66 | will be asked f| 00002160 6f 72 20 61 20 70 61 73 73 77 6f 72 64 20 74 68 |or a password th| 00002170 61 74 20 69 73 20 74 6f 20 67 6f 20 0d 20 20 20 |at is to go . | 00002180 20 20 20 77 69 74 68 20 74 68 65 20 66 69 6c 65 | with the file| 00002190 2c 20 77 68 69 63 68 20 77 69 6c 6c 20 73 74 6f |, which will sto| 000021a0 70 20 61 6e 79 20 75 6e 61 74 68 6f 75 72 69 73 |p any unathouris| 000021b0 65 64 20 70 65 6f 70 6c 65 20 66 72 6f 6d 20 73 |ed people from s| 000021c0 65 65 69 6e 67 20 0d 20 20 20 20 20 20 79 6f 75 |eeing . you| 000021d0 72 20 69 6e 66 6f 2e 2e 20 28 62 75 74 20 6d 61 |r info.. (but ma| 000021e0 6b 65 20 73 75 72 65 20 79 6f 75 20 72 65 6d 65 |ke sure you reme| 000021f0 6d 62 65 72 20 74 68 65 20 70 61 73 73 77 6f 72 |mber the passwor| 00002200 64 20 6f 72 20 79 6f 75 20 77 6f 6e 27 74 20 62 |d or you won't b| 00002210 65 20 0d 20 20 20 20 20 20 61 62 6c 65 20 74 6f |e . able to| 00002220 20 73 65 65 20 79 6f 75 72 20 66 69 6c 65 20 65 | see your file e| 00002230 69 74 68 65 72 21 29 2e 20 0d 20 20 20 20 4f 52 |ither!). . OR| 00002240 44 45 52 20 54 68 69 73 20 63 61 6e 20 73 77 61 |DER This can swa| 00002250 70 20 74 77 6f 20 72 65 63 6f 72 64 73 20 77 69 |p two records wi| 00002260 74 68 20 65 61 63 68 20 6f 74 68 65 72 2c 20 77 |th each other, w| 00002270 68 69 63 68 20 65 6e 61 62 6c 65 73 20 79 6f 75 |hich enables you| 00002280 20 74 6f 20 0d 20 20 20 20 20 20 6d 6f 76 65 20 | to . move | 00002290 74 68 65 20 72 65 63 6f 72 64 73 20 61 72 6f 75 |the records arou| 000022a0 6e 64 20 74 68 65 20 66 69 6c 65 20 73 6f 20 61 |nd the file so a| 000022b0 73 20 74 6f 20 70 75 74 20 74 68 65 6d 20 69 6e |s to put them in| 000022c0 20 74 68 65 20 6f 72 64 65 72 20 79 6f 75 20 0d | the order you .| 000022d0 20 20 20 20 20 20 77 61 6e 74 20 74 68 65 6d 2e | want them.| 000022e0 20 57 68 65 6e 20 79 6f 75 20 75 73 65 20 74 68 | When you use th| 000022f0 65 20 63 6f 6d 6d 61 6e 64 2c 20 79 6f 75 20 77 |e command, you w| 00002300 69 6c 6c 20 62 65 20 61 73 6b 65 64 20 66 6f 72 |ill be asked for| 00002310 20 74 77 6f 20 0d 20 20 20 20 20 20 72 65 63 6f | two . reco| 00002320 72 64 20 6e 75 6d 62 65 72 73 2c 20 77 68 69 63 |rd numbers, whic| 00002330 68 20 61 72 65 20 74 68 65 20 74 77 6f 20 74 6f |h are the two to| 00002340 20 62 65 20 73 77 61 70 70 65 64 2e 20 0d 20 20 | be swapped. . | 00002350 20 20 2a 4f 53 20 54 6f 20 61 63 63 65 73 73 20 | *OS To access | 00002360 74 68 69 73 20 63 6f 6d 6d 61 6e 64 20 73 69 6d |this command sim| 00002370 70 6c 79 20 6b 65 65 70 20 53 48 49 46 54 20 70 |ply keep SHIFT p| 00002380 72 65 73 73 65 64 20 61 6e 64 20 74 68 65 6e 20 |ressed and then | 00002390 68 69 74 20 74 68 65 20 0d 20 20 20 20 20 20 2a |hit the . *| 000023a0 20 6b 65 79 2e 20 41 20 2a 20 77 69 6c 6c 20 74 | key. A * will t| 000023b0 68 65 6e 20 63 6f 6d 65 20 6f 6e 74 6f 20 74 68 |hen come onto th| 000023c0 65 20 73 63 72 65 65 6e 2c 20 61 66 74 65 72 77 |e screen, afterw| 000023d0 68 69 63 68 20 79 6f 75 20 63 61 6e 20 65 6e 74 |hich you can ent| 000023e0 65 72 20 0d 20 20 20 20 20 20 79 6f 75 72 20 6f |er . your o| 000023f0 70 65 72 61 74 69 6e 67 20 73 79 73 74 65 6d 20 |perating system | 00002400 63 6f 6d 6d 61 6e 64 2e 20 54 68 69 73 20 65 6e |command. This en| 00002410 61 62 6c 65 73 20 79 6f 75 20 74 6f 20 64 6f 20 |ables you to do | 00002420 74 68 69 6e 67 73 20 73 75 63 68 20 61 73 20 0d |things such as .| 00002430 20 20 20 20 20 20 63 61 74 61 6c 6f 67 69 6e 67 | cataloging| 00002440 20 61 20 64 69 73 63 20 28 2a 43 41 54 29 2c 20 | a disc (*CAT), | 00002450 6f 72 20 73 65 6c 65 63 74 69 6e 67 20 61 20 66 |or selecting a f| 00002460 69 6c 69 6e 67 20 73 79 73 74 65 6d 20 28 2a 44 |iling system (*D| 00002470 49 53 43 2c 20 2a 54 41 50 45 20 0d 20 20 20 20 |ISC, *TAPE . | 00002480 20 20 65 74 63 29 2e 20 46 6f 72 20 6d 6f 72 65 | etc). For more| 00002490 20 64 65 74 61 69 6c 73 20 6f 66 20 6f 70 65 72 | details of oper| 000024a0 61 74 69 6e 67 20 73 79 73 74 65 6d 20 63 6f 6d |ating system com| 000024b0 6d 61 6e 64 73 2c 20 73 65 65 20 70 61 67 65 20 |mands, see page | 000024c0 34 31 36 20 6f 66 20 0d 20 20 20 20 20 20 74 68 |416 of . th| 000024d0 65 20 75 73 65 72 20 67 75 69 64 65 2e 20 0d 20 |e user guide. . | 000024e0 20 20 20 50 52 49 4e 54 20 49 66 20 61 20 70 72 | PRINT If a pr| 000024f0 69 6e 74 65 72 20 69 73 20 63 6f 6e 6e 65 63 74 |inter is connect| 00002500 65 64 20 74 6f 20 79 6f 75 72 20 63 6f 6d 70 75 |ed to your compu| 00002510 74 65 72 20 79 6f 75 20 77 69 6c 6c 20 62 65 20 |ter you will be | 00002520 61 62 6c 65 20 74 6f 20 0d 20 20 20 20 20 20 67 |able to . g| 00002530 65 74 20 61 20 68 61 72 64 20 63 6f 70 79 20 6f |et a hard copy o| 00002540 66 20 61 20 73 69 6e 67 6c 65 20 72 65 63 6f 72 |f a single recor| 00002550 64 2c 20 6f 72 20 74 68 65 20 77 68 6f 6c 65 20 |d, or the whole | 00002560 66 69 6c 65 2e 20 57 68 65 6e 20 70 72 69 6e 74 |file. When print| 00002570 69 6e 67 20 0d 20 20 20 20 20 20 6f 75 74 20 61 |ing . out a| 00002580 6c 6c 20 74 68 65 20 72 65 63 6f 72 64 73 2c 20 |ll the records, | 00002590 79 6f 75 20 77 69 6c 6c 20 62 65 20 61 73 6b 65 |you will be aske| 000025a0 64 20 66 6f 72 20 61 6e 20 69 6e 74 65 72 2d 72 |d for an inter-r| 000025b0 65 63 6f 72 64 20 73 70 61 63 65 20 0d 20 20 20 |ecord space . | 000025c0 20 20 20 63 68 61 72 61 63 74 65 72 20 77 68 69 | character whi| 000025d0 63 68 20 77 69 6c 6c 20 62 65 20 70 72 69 6e 74 |ch will be print| 000025e0 65 64 20 69 6e 20 61 20 6c 6f 6e 67 20 6c 69 6e |ed in a long lin| 000025f0 65 20 74 6f 20 73 65 70 65 72 61 74 65 20 65 61 |e to seperate ea| 00002600 63 68 20 0d 20 20 20 20 20 20 72 65 63 6f 72 64 |ch . record| 00002610 20 6f 6e 20 74 68 65 20 70 61 70 65 72 20 28 61 | on the paper (a| 00002620 20 73 75 69 74 61 62 6c 65 20 63 68 61 72 61 63 | suitable charac| 00002630 74 65 72 20 69 73 20 61 20 27 2d 27 29 2e 20 0d |ter is a '-'). .| 00002640 20 20 20 20 52 45 53 45 54 20 57 68 65 6e 20 79 | RESET When y| 00002650 6f 75 20 70 72 65 73 73 20 27 52 27 20 74 68 69 |ou press 'R' thi| 00002660 73 20 77 69 70 65 73 20 74 68 65 20 6d 65 6d 6f |s wipes the memo| 00002670 72 79 20 77 68 65 72 65 20 74 68 65 20 63 75 72 |ry where the cur| 00002680 72 65 6e 74 20 66 69 6c 65 20 0d 20 20 20 20 20 |rent file . | 00002690 20 69 73 20 73 74 6f 72 65 64 2c 20 74 68 75 73 | is stored, thus| 000026a0 20 77 69 70 69 6e 67 20 6f 75 74 20 74 68 65 20 | wiping out the | 000026b0 66 69 6c 65 2e 20 55 73 65 20 74 68 69 73 20 63 |file. Use this c| 000026c0 6f 6d 6d 61 6e 64 20 63 61 72 65 66 75 6c 6c 79 |ommand carefully| 000026d0 2c 20 61 6e 64 20 0d 20 20 20 20 20 20 6d 61 6b |, and . mak| 000026e0 65 20 73 75 72 65 20 74 68 61 74 20 79 6f 75 20 |e sure that you | 000026f0 68 61 76 65 20 73 61 76 65 64 20 74 68 65 20 66 |have saved the f| 00002700 69 6c 65 20 62 65 66 6f 72 65 20 75 73 69 6e 67 |ile before using| 00002710 20 52 45 53 45 54 2e 20 0d 20 20 20 20 53 45 41 | RESET. . SEA| 00002720 52 43 48 20 54 68 69 73 20 63 6f 6d 6d 61 6e 64 |RCH This command| 00002730 20 65 6e 61 62 6c 65 73 20 79 6f 75 20 74 6f 20 | enables you to | 00002740 66 69 6e 64 20 61 20 72 65 63 6f 72 64 20 71 75 |find a record qu| 00002750 69 63 6b 6c 79 20 62 79 20 61 73 6b 69 6e 67 20 |ickly by asking | 00002760 66 6f 72 20 0d 0d 0d 20 20 20 20 20 20 20 20 20 |for ... | 00002770 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00002780 20 20 20 20 20 20 20 20 20 20 20 50 61 67 65 20 | Page | 00002790 33 0d 0d 0d 0d 0d 0d 20 20 20 20 20 20 20 20 20 |3...... | 000027a0 20 20 20 20 20 20 20 20 20 20 20 20 41 20 44 41 | A DA| 000027b0 54 41 2d 42 41 53 45 20 53 59 53 54 45 4d 20 62 |TA-BASE SYSTEM b| 000027c0 79 20 52 4f 42 20 41 4e 44 45 52 53 4f 4e 2e 0d |y ROB ANDERSON..| 000027d0 0d 0d 0d 20 20 20 20 20 20 61 20 73 65 61 72 63 |... a searc| 000027e0 68 20 72 65 63 6f 72 64 2c 20 61 66 74 65 72 77 |h record, afterw| 000027f0 68 69 63 68 20 69 74 20 77 69 6c 6c 20 73 65 61 |hich it will sea| 00002800 72 63 68 20 74 68 65 20 66 69 6c 65 20 66 6f 72 |rch the file for| 00002810 20 61 6e 6f 74 68 65 72 20 0d 20 20 20 20 20 20 | another . | 00002820 72 65 63 6f 72 64 20 74 68 61 74 20 69 73 20 74 |record that is t| 00002830 68 65 20 63 6c 6f 73 65 73 74 20 6d 61 74 63 68 |he closest match| 00002840 2e 20 55 70 6f 6e 20 64 65 63 69 64 69 6e 67 20 |. Upon deciding | 00002850 77 68 69 63 68 20 69 73 20 74 68 65 20 62 65 73 |which is the bes| 00002860 74 20 0d 20 20 20 20 20 20 62 65 74 2c 20 69 74 |t . bet, it| 00002870 20 77 69 6c 6c 20 70 72 69 6e 74 20 6f 75 74 20 | will print out | 00002880 74 68 65 20 63 6c 6f 73 65 73 74 20 6d 61 74 63 |the closest matc| 00002890 68 69 6e 67 20 72 65 63 6f 72 64 2e 20 53 6f 2c |hing record. 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20 20 50 52 4f 43 45 44 55 52 45 53 20 20 | PROCEDURES | 00003450 20 4c 49 4e 45 20 4e 4f 53 20 20 44 45 53 43 52 | LINE NOS DESCR| 00003460 49 50 54 49 4f 4e 20 0d 20 20 20 20 20 0d 20 20 |IPTION . . | 00003470 20 20 69 6e 69 74 69 61 6c 69 73 65 20 20 20 33 | initialise 3| 00003480 31 30 20 20 20 20 20 20 20 49 6e 69 74 69 61 6c |10 Initial| 00003490 69 73 65 73 20 76 61 72 69 61 62 6c 65 73 20 65 |ises variables e| 000034a0 74 63 2e 2e 20 0d 20 20 20 20 63 68 65 63 6b 65 |tc.. . checke| 000034b0 72 72 6f 72 20 20 20 33 37 30 20 20 20 20 20 20 |rror 370 | 000034c0 20 41 6e 61 6c 79 73 65 73 20 65 72 72 6f 72 20 | Analyses error | 000034d0 26 20 72 65 61 63 74 73 20 61 63 6f 72 64 69 6e |& reacts acordin| 000034e0 67 6c 79 2e 20 0d 20 20 20 20 73 65 74 73 63 72 |gly. . setscr| 000034f0 65 65 6e 20 20 20 20 33 39 30 20 20 20 20 20 20 |een 390 | 00003500 20 53 65 74 73 20 75 70 20 73 63 72 65 65 6e 2e | Sets up screen.| 00003510 20 0d 20 20 20 20 61 20 20 20 20 20 20 20 20 20 | . a | 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The | 000047e0 74 6f 70 20 6f 66 20 75 73 65 72 20 6d 65 6d 6f |top of user memo| 000047f0 72 79 20 69 73 20 0d 20 20 20 20 26 37 43 30 30 |ry is . &7C00| 00004800 2c 20 73 6f 20 74 68 69 73 20 6c 65 61 76 65 73 |, so this leaves| 00004810 20 28 26 37 43 30 30 2d 26 34 35 30 30 29 3d 31 | (&7C00-&4500)=1| 00004820 34 6b 20 62 79 74 65 73 20 6f 66 20 6d 65 6d 6f |4k bytes of memo| 00004830 72 79 20 66 72 65 65 20 66 6f 72 20 74 68 65 20 |ry free for the | 00004840 0d 20 20 20 20 64 61 74 61 20 66 69 6c 65 2c 20 |. data file, | 00004850 77 68 69 63 68 20 6d 65 61 6e 73 20 74 68 61 74 |which means that| 00004860 20 74 79 70 69 63 61 6c 6c 79 20 61 62 6f 75 74 | typically about| 00004870 20 32 30 30 20 72 65 63 6f 72 64 73 20 6f 66 20 | 200 records of | 00004880 35 20 66 69 65 6c 64 73 20 6f 66 20 0d 20 20 20 |5 fields of . | 00004890 20 31 30 20 63 68 61 72 61 63 74 65 72 73 20 70 | 10 characters p| 000048a0 65 72 20 66 69 65 6c 64 20 63 61 6e 20 62 65 20 |er field can be | 000048b0 65 6e 74 65 72 65 64 2c 20 77 68 69 63 68 20 69 |entered, which i| 000048c0 73 20 71 75 69 74 65 20 61 20 75 73 65 66 75 6c |s quite a useful| 000048d0 20 73 69 7a 65 2e 20 0d 20 20 20 20 20 0d 20 20 | size. . . | 000048e0 20 20 4d 45 4d 4f 52 59 20 55 53 41 47 45 20 53 | MEMORY USAGE S| 000048f0 55 4d 4d 41 52 59 20 3a 20 0d 20 20 20 20 20 0d |UMMARY : . .| 00004900 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00004910 20 20 20 20 20 20 20 20 20 20 2e 20 20 20 20 20 | . | 00004920 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2e | .| 00004930 20 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | . | 00004940 20 20 20 20 20 20 20 20 20 20 20 20 2e 20 20 20 | . | 00004950 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00004960 20 2e 20 0d 20 20 20 20 20 20 20 20 20 20 20 20 | . . | 00004970 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2e 20 | . | 00004980 20 20 20 20 20 20 4d 4f 44 45 20 37 20 20 20 20 | MODE 7 | 00004990 20 20 20 2e 20 0d 20 20 20 20 20 20 20 20 20 20 | . . | 000049a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000049b0 2e 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 000049c0 20 20 20 20 20 2e 20 0d 20 20 20 20 20 20 20 20 | . . | 000049d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000049e0 20 20 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f | ______________| 000049f0 5f 5f 5f 00 00 00 00 00 00 00 00 00 00 00 00 00 |___.............| 00004a00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00004f10 00 00 45 20 74 68 65 72 65 20 61 72 65 20 61 20 |..E there are a | 00004f20 66 65 77 20 6c 69 74 74 6c 65 20 74 69 70 73 20 |few little tips | 00004f30 74 68 61 74 20 63 61 6e 20 6d 61 6b 65 20 69 74 |that can make it| 00004f40 20 0d 20 20 20 20 65 61 73 69 65 72 20 61 6e 64 | . easier and| 00004f50 20 6d 6f 72 65 20 65 66 66 69 63 69 65 6e 74 20 | more efficient | 00004f60 74 6f 20 75 73 65 2e 20 0d 20 20 20 20 20 0d 20 |to use. . . | 00004f70 20 20 20 20 20 20 20 20 57 68 65 6e 20 64 65 66 | When def| 00004f80 69 6e 69 6e 67 20 61 20 4e 45 57 20 72 65 63 6f |ining a NEW reco| 00004f90 72 64 2c 20 74 68 69 6e 6b 20 63 61 72 65 66 75 |rd, think carefu| 00004fa0 6c 6c 79 20 61 62 6f 75 74 20 68 6f 77 20 74 6f |lly about how to| 00004fb0 20 64 65 66 69 6e 65 20 0d 20 20 20 20 69 74 20 | define . it | 00004fc0 62 65 63 61 75 73 65 20 6f 6e 63 65 20 73 65 74 |because once set| 00004fd0 20 6f 75 74 2c 20 69 74 20 63 61 6e 6e 6f 74 20 | out, it cannot | 00004fe0 62 65 20 63 68 61 6e 67 65 64 20 77 68 69 63 68 |be changed which| 00004ff0 20 6d 65 61 6e 73 20 74 68 61 74 20 69 66 20 79 | means that if y| 00005000 6f 75 20 0d 20 20 20 20 68 61 76 65 20 65 6e 74 |ou . have ent| 00005010 65 72 65 64 20 73 61 79 20 31 30 30 20 72 65 63 |ered say 100 rec| 00005020 6f 72 64 73 2c 20 61 6e 64 20 74 68 65 6e 20 66 |ords, and then f| 00005030 69 6e 64 20 6f 75 74 20 74 68 61 74 20 79 6f 75 |ind out that you| 00005040 20 6e 65 65 64 20 61 6e 6f 74 68 65 72 20 0d 20 | need another . | 00005050 20 20 20 66 69 65 6c 64 20 66 6f 72 20 63 65 72 | field for cer| 00005060 74 61 69 6e 20 65 6e 74 72 69 65 73 2c 20 79 6f |tain entries, yo| 00005070 75 20 77 69 6c 6c 20 68 61 76 65 20 74 6f 20 74 |u will have to t| 00005080 79 70 65 20 74 68 65 20 77 68 6f 6c 65 20 66 69 |ype the whole fi| 00005090 6c 65 20 69 6e 20 0d 20 20 20 20 61 67 61 69 6e |le in . again| 000050a0 21 20 42 65 63 61 75 73 65 20 6f 66 20 74 68 69 |! Because of thi| 000050b0 73 2c 20 69 74 20 69 73 20 61 6c 73 6f 20 61 20 |s, it is also a | 000050c0 67 6f 6f 64 20 69 64 65 61 20 74 6f 20 68 61 76 |good idea to hav| 000050d0 65 20 61 20 66 69 65 6c 64 20 63 61 6c 6c 65 64 |e a field called| 000050e0 20 0d 0d 0d 20 20 20 20 20 20 20 20 20 20 20 20 | ... | 000050f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00005100 20 20 20 20 20 20 20 20 50 61 67 65 20 37 0d 0d | Page 7..| 00005110 0d 0d 0d 0d 20 20 20 20 20 20 20 20 20 20 20 20 |.... | 00005120 20 20 20 20 20 20 20 20 20 41 20 44 41 54 41 2d | A DATA-| 00005130 42 41 53 45 20 53 59 53 54 45 4d 20 62 79 20 52 |BASE SYSTEM by R| 00005140 4f 42 20 41 4e 44 45 52 53 4f 4e 2e 0d 0d 0d 0d |OB ANDERSON.....| 00005150 20 20 20 20 27 41 4e 59 54 48 49 4e 47 20 45 4c | 'ANYTHING EL| 00005160 53 45 27 20 6f 72 20 27 4d 49 53 43 45 4c 4c 41 |SE' or 'MISCELLA| 00005170 4e 45 4f 55 53 27 2c 20 66 6f 72 20 72 65 63 6f |NEOUS', for reco| 00005180 72 64 73 20 74 68 61 74 20 6d 61 79 20 68 61 76 |rds that may hav| 00005190 65 20 75 6e 75 73 75 61 6c 20 0d 20 20 20 20 65 |e unusual . e| 000051a0 6e 74 72 69 65 73 2e 20 0d 20 20 20 20 20 0d 20 |ntries. . . | 000051b0 20 20 20 20 20 20 20 20 57 68 65 6e 20 65 6e 74 | When ent| 000051c0 65 72 69 6e 67 20 79 6f 75 72 20 66 69 65 6c 64 |ering your field| 000051d0 20 74 69 74 6c 65 73 2c 20 79 6f 75 20 63 61 6e | titles, you can| 000051e0 20 73 74 69 6c 6c 20 75 73 65 20 74 68 65 20 66 | still use the f| 000051f0 75 6e 63 74 69 6f 6e 20 0d 20 20 20 20 6b 65 79 |unction . key| 00005200 73 20 74 6f 20 67 65 74 20 4d 4f 44 45 20 37 20 |s to get MODE 7 | 00005210 63 6f 6c 6f 75 72 65 64 20 63 68 61 72 61 63 74 |coloured charact| 00005220 65 72 73 2c 20 77 68 69 63 68 20 65 6e 61 62 6c |ers, which enabl| 00005230 65 73 20 79 6f 75 20 74 6f 20 73 65 74 20 75 70 |es you to set up| 00005240 20 61 20 0d 20 20 20 20 66 69 6c 65 20 74 68 61 | a . file tha| 00005250 74 20 73 74 61 6e 64 73 20 6f 75 74 20 77 65 6c |t stands out wel| 00005260 6c 2c 20 6d 61 6b 69 6e 67 20 69 74 20 65 61 73 |l, making it eas| 00005270 69 65 72 20 61 6e 64 20 6d 6f 72 65 20 63 6f 6c |ier and more col| 00005280 6f 75 72 66 75 6c 20 74 6f 20 75 73 65 20 0d 20 |ourful to use . | 00005290 20 20 20 28 61 6c 74 68 6f 75 67 68 20 79 6f 75 | (although you| 000052a0 20 6d 61 79 20 67 65 74 20 66 75 6e 6e 79 20 6e | may get funny n| 000052b0 6f 69 73 65 73 20 63 6f 6d 69 6e 67 20 66 72 6f |oises coming fro| 000052c0 6d 20 79 6f 75 72 20 70 72 69 6e 74 65 72 20 77 |m your printer w| 000052d0 68 65 6e 20 0d 20 20 20 20 70 72 69 6e 74 69 6e |hen . printin| 000052e0 67 20 61 20 72 65 63 6f 72 64 21 29 2e 20 0d 20 |g a record!). . | 000052f0 20 20 20 20 0d 20 20 20 20 20 20 20 20 20 49 66 | . If| 00005300 20 79 6f 75 20 68 61 76 65 20 6e 6f 20 6e 65 65 | you have no nee| 00005310 64 20 66 6f 72 20 73 65 63 75 72 69 74 79 20 70 |d for security p| 00005320 72 65 63 61 75 74 69 6f 6e 73 2c 20 75 73 65 20 |recautions, use | 00005330 74 68 65 20 70 61 73 73 77 6f 72 64 20 0d 20 20 |the password . | 00005340 20 20 27 44 41 54 41 42 41 53 45 27 20 66 6f 72 | 'DATABASE' for| 00005350 20 79 6f 75 72 20 66 69 6c 65 2c 20 61 73 20 74 | your file, as t| 00005360 68 69 73 20 69 73 20 73 75 67 67 65 73 74 65 64 |his is suggested| 00005370 20 62 79 20 74 68 65 20 70 72 6f 67 72 61 6d 20 | by the program | 00005380 77 68 69 63 68 20 0d 20 20 20 20 6d 61 6b 65 73 |which . makes| 00005390 20 69 74 20 69 6d 70 6f 73 73 69 62 6c 65 20 66 | it impossible f| 000053a0 6f 72 20 79 6f 75 20 74 6f 20 66 6f 72 67 65 74 |or you to forget| 000053b0 21 20 0d 20 20 20 20 20 0d 20 20 20 20 20 20 20 |! . . | 000053c0 20 20 41 73 20 61 20 66 69 6e 61 6c 6c 79 20 6e | As a finally n| 000053d0 6f 74 65 2c 20 41 4c 57 41 59 53 20 4b 45 45 50 |ote, ALWAYS KEEP| 000053e0 20 43 4f 50 49 45 53 20 4f 46 20 59 4f 55 52 20 | COPIES OF YOUR | 000053f0 44 41 54 41 20 46 49 4c 45 53 2c 20 62 65 63 61 |DATA FILES, beca| 00005400 75 73 65 20 0d 20 20 20 20 69 66 20 79 6f 75 20 |use . if you | 00005410 64 6f 6e 27 74 20 79 6f 75 27 6c 6c 20 68 61 76 |don't you'll hav| 00005420 65 20 74 6f 20 6c 65 61 72 6e 20 74 68 65 20 68 |e to learn the h| 00005430 61 72 64 20 77 61 79 2c 20 73 6f 20 62 65 20 77 |ard way, so be w| 00005440 61 72 6e 65 64 21 20 0d 20 20 20 20 20 0d 20 20 |arned! . . | 00005450 20 20 20 0d 20 20 20 20 20 0d 20 20 20 20 20 0d | . . .| 00005460 20 20 20 20 20 0d 20 20 20 20 20 0d 20 20 20 20 | . . | 00005470 20 0d 20 20 20 20 20 0d 20 20 20 20 20 0d 20 20 | . . . | 00005480 20 20 20 0d 20 20 20 20 20 20 20 20 20 20 20 20 | . | 00005490 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000054a0 20 20 20 20 20 20 20 20 20 20 20 52 2e 53 2e 41 | R.S.A| 000054b0 4e 44 45 52 53 4f 4e 2e 20 4a 41 4e 20 31 39 38 |NDERSON. JAN 198| 000054c0 37 2e 20 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d |7. .............| 000054d0 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d 0d |................| 000054e0 0d 0d 0d 0d 0d 0d 0d 0d 20 20 20 20 20 20 20 20 |........ | 000054f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00005500 20 20 20 20 20 20 20 20 20 20 20 20 50 61 67 65 | Page| 00005510 20 38 0d 0d 0d 0d | 8....| 00005516
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