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28-03-88/HLP\INF
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 » telesoftware6.adl |
| Filename: | 28-03-88/HLP\INF |
| Read OK: | ✔ |
| File size: | 1E86 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- CEEFAX disks » telesoftware3.adl » 01_11_87/HLP\INF
- CEEFAX disks » telesoftware6.adl » 28-03-88/HLP\INF
File contents
M.J.RAWLINGS 17-4-87
HELPFILE
If, like me, you have an unreliable memory you are probably
fed up with constantly searching through the various advance manuals
available for the B.B.C. looking for confirmation of something you
should know but could not quite remember the exact syntax of. How much
more convenient it would be if all the most important facts could be
available as *HELP information. Loaded into a sideways ram bank and
ready to be displayed at any time. If you have more than one bank of
sideways ram, as many BEEB users now do, you could have multiple banks
of helpfiles booted up ready for any programming session.
The HELPFILE program can be used to create your own
customised sideways ram *HELP facility. On running the program you
will be presented with a menu, to start creating your own helpfile
choose option 1, this sets up a random access disc file which will be
used to store the data needed to create the final rom image. This
random access file is broken up into sections, one for each *HELP
command, you can see them being counted off on the screen as the file
is created. When the count reaches the maximum number of files (150)
you will then be presented with the editing screen. Note that this
file is nearly twice as long (almost 32K) as the maximum size of rom
image being created (16k), this is because each command is initially
allowed message space of 5 lines of 40 characters. When the final
helpfile is created all the unwanted spaces are removed, the editor
includes a byte count constantly updated on the screen to help you use
the available space efficiently.
EDITOR
The editor is entered at command number 1, you will see the
cursor on the command line, below this there are 5 lines for typing in
the message to be displayed. At the top right the number of bytes left
is displayed, this should read 16157 for a new blank file. Use the
cursor keys to move around the screen, anything typed will either be
inserted at the cursor position or will overwrite current text at the
cursor position. You can toggle between insert and over modes using
the <COPY> key, the current state of this switch being displayed at
the bottom right of the screen. Commands have a maximum length of ten
letters and are automatically restricted by the editor to upper case,
numbers and the characters:- /<=>?@[\]^_# i.e. characters numbered
from 47 to 96. This is not only to eliminate characters which BBC
Basic might misinterpret but also because *HELP commands are
automatically converted to upper case and would not be recognised if
the rom image contained lower case commands. The actual message
displayed on the screen is not limited in this way and can contain any
typable character, i.e. character numbers 32 to 126.
Each line of text has a line limiter at the end "|", this is
there so that you can "see" any blank spaces on a line. The bytes left
count is automatically updated as you type, but you will notice that
if the command line is empty then this count will remain unchanged,
this is because when the final rom image is created all zero commands
are ignored. Similarly all zero message lines will be ignored, if you
wish to space out your messages then you will have to put at least one
blank space in the line between the messages. You can continue to type
even when the bytes count is minus, though if you do not go back and
edit other commands to return the byte count to positive then when the
helpfile is created you will lose any surplus commands. The routine to
create a helpfile includes its own byte count check and will ensure
that there is enough space left before encoding each command, you
should never end up with half a message tacked on at the end of the
file.
When you have finished the first command press <TAB>, you
now have the choice of either pressing <RETURN> to go onto the next
command, or entering the command number you wish to edit next or
pressing <ESCAPE> to return to the menu. On pressing <TAB> the data
you have just typed in will be stored on disk in the data file, you do
not have to create the whole rom image in one sitting, any data file
can be edited one command at a time at your convenience using menu
option number 2. You can type in and edit commands out of order as any
blank commands will be ignored.
CREATING A HELPFILE
Choose option 3 and enter the filename to be used for
creating the finished rom image, this must be different from the
filename for the datafile from which the final helpfile is created.
Next enter the datafile filename and you will see the commands being
counted off on the screen. When this process is finished you can exit
the program and load the helpfile into sideways ram, you will need to
press <BREAK> to initialise it. This should display the name of your
helpfile along with the normal startup messages. Now type *HELP
<RETURN> and this same message will be displayed, any message can now
be displayed by typing *H.(COMMAND) <RETURN>.
OPERATING SYSTEM COMMANDS
Any * command can be entered from the menu either by
choosing option 4 or typing <*>. The program includes a *FX180 command
which sets OSHWM (operating system high water mark) to an address
above the area used by the program. This means that any command which
would normally corrupt the program area, such as *BACKUP or *COMPACT
can be issued from within the program in complete safety. These
commands use the area from OSHWM to HIMEM as an extended disk buffer,
OSHWM is normally set at the same address as PAGE thereby corrupting
any program or data stored above PAGE. Setting OSHWM above the area
used by the program sets up a safe buffer area, this buffer is smaller
than usual so *BACKUP will require more passes and will take longer
than usual. If you use this idea in your own program be careful not to
issue the O/S command from within a procedure or function as the
return addresses and local variables used by PROCs and FNs are stored
on the stack below HIMEM and could be corrupted. If you are creating a
helpfile with many repetitive messages then you can enter a *KEY
command to setup the function keys to type these parts for you.
COMPATIBILITY
This program has been tested on a BBC B with an issue 7
board and O/S 1.2/ACORN DFS 1.2, using Solidisk's 2MHZ 256K sideways
ram (with and without a 6502 second processor). It has also been used
on an identical machine fitted with Solidisk's original SWR128 and on
the same machine fitted with Acorn User's 16K UserRAM. There are no
illegal peeks or pokes, and only well documented operating system
calls are used so it should work with all BBC type machines including
the ELECTRON and COMPACT.
FXHELP
Broadcast with this program is an example helpfile (FXHELP)
together with the datafile used in its creation (FXDATA). This gives
help messages on all the available FX commands, load this into
sideways ram, press <BREAK> and you should see the message:-
Help File : FXHELP
Typing *H.FXHELP will display a list of the available FX help
messages, for example *H.FX0 will display:-
Print OS No.
If you can create a really useful helpfile why not send it in to the
BBC Telesoftware service for broadcasting?
00000000 0d 0d 0d 0d 0d 0d 20 20 20 20 20 20 20 20 20 20 |...... | 00000010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000030 20 20 20 20 20 20 20 20 4d 2e 4a 2e 52 41 57 4c | M.J.RAWL| 00000040 49 4e 47 53 20 31 37 2d 34 2d 38 37 0d 20 20 20 |INGS 17-4-87. | 00000050 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000060 20 20 20 20 20 20 20 20 20 20 20 20 48 45 4c 50 | HELP| 00000070 46 49 4c 45 0d 0d 0d 20 20 20 20 20 20 20 20 20 |FILE... | 00000080 20 49 66 2c 20 20 6c 69 6b 65 20 6d 65 2c 20 79 | If, like me, y| 00000090 6f 75 20 68 61 76 65 20 61 6e 20 75 6e 72 65 6c |ou have an unrel| 000000a0 69 61 62 6c 65 20 6d 65 6d 6f 72 79 20 79 6f 75 |iable memory you| 000000b0 20 61 72 65 20 70 72 6f 62 61 62 6c 79 0d 66 65 | are probably.fe| 000000c0 64 20 75 70 20 77 69 74 68 20 63 6f 6e 73 74 61 |d up with consta| 000000d0 6e 74 6c 79 20 73 65 61 72 63 68 69 6e 67 20 74 |ntly searching t| 000000e0 68 72 6f 75 67 68 20 74 68 65 20 76 61 72 69 6f |hrough the vario| 000000f0 75 73 20 20 61 64 76 61 6e 63 65 20 20 6d 61 6e |us advance man| 00000100 75 61 6c 73 0d 61 76 61 69 6c 61 62 6c 65 20 20 |uals.available | 00000110 66 6f 72 20 20 74 68 65 20 20 42 2e 42 2e 43 2e |for the B.B.C.| 00000120 20 20 6c 6f 6f 6b 69 6e 67 20 66 6f 72 20 63 6f | looking for co| 00000130 6e 66 69 72 6d 61 74 69 6f 6e 20 6f 66 20 73 6f |nfirmation of so| 00000140 6d 65 74 68 69 6e 67 20 79 6f 75 0d 73 68 6f 75 |mething you.shou| 00000150 6c 64 20 6b 6e 6f 77 20 62 75 74 20 63 6f 75 6c |ld know but coul| 00000160 64 20 6e 6f 74 20 71 75 69 74 65 20 72 65 6d 65 |d not quite reme| 00000170 6d 62 65 72 20 74 68 65 20 65 78 61 63 74 20 73 |mber the exact s| 00000180 79 6e 74 61 78 20 6f 66 2e 20 48 6f 77 20 6d 75 |yntax of. How mu| 00000190 63 68 0d 6d 6f 72 65 20 63 6f 6e 76 65 6e 69 65 |ch.more convenie| 000001a0 6e 74 20 69 74 20 77 6f 75 6c 64 20 62 65 20 69 |nt it would be i| 000001b0 66 20 61 6c 6c 20 74 68 65 20 6d 6f 73 74 20 69 |f all the most i| 000001c0 6d 70 6f 72 74 61 6e 74 20 66 61 63 74 73 20 20 |mportant facts | 000001d0 63 6f 75 6c 64 20 20 62 65 0d 61 76 61 69 6c 61 |could be.availa| 000001e0 62 6c 65 20 20 61 73 20 20 2a 48 45 4c 50 20 20 |ble as *HELP | 000001f0 69 6e 66 6f 72 6d 61 74 69 6f 6e 2e 20 4c 6f 61 |information. Loa| 00000200 64 65 64 20 69 6e 74 6f 20 61 20 73 69 64 65 77 |ded into a sidew| 00000210 61 79 73 20 72 61 6d 20 62 61 6e 6b 20 61 6e 64 |ays ram bank and| 00000220 0d 72 65 61 64 79 20 74 6f 20 62 65 20 64 69 73 |.ready to be dis| 00000230 70 6c 61 79 65 64 20 61 74 20 61 6e 79 20 74 69 |played at any ti| 00000240 6d 65 2e 20 49 66 20 79 6f 75 20 68 61 76 65 20 |me. If you have | 00000250 6d 6f 72 65 20 74 68 61 6e 20 6f 6e 65 20 20 62 |more than one b| 00000260 61 6e 6b 20 20 6f 66 0d 73 69 64 65 77 61 79 73 |ank of.sideways| 00000270 20 72 61 6d 2c 20 61 73 20 6d 61 6e 79 20 42 45 | ram, as many BE| 00000280 45 42 20 75 73 65 72 73 20 6e 6f 77 20 64 6f 2c |EB users now do,| 00000290 20 79 6f 75 20 63 6f 75 6c 64 20 68 61 76 65 20 | you could have | 000002a0 6d 75 6c 74 69 70 6c 65 20 62 61 6e 6b 73 0d 6f |multiple banks.o| 000002b0 66 20 68 65 6c 70 66 69 6c 65 73 20 62 6f 6f 74 |f helpfiles boot| 000002c0 65 64 20 75 70 20 72 65 61 64 79 20 66 6f 72 20 |ed up ready for | 000002d0 61 6e 79 20 70 72 6f 67 72 61 6d 6d 69 6e 67 20 |any programming | 000002e0 73 65 73 73 69 6f 6e 2e 20 0d 0d 20 20 20 20 20 |session. .. | 000002f0 20 20 20 20 20 54 68 65 20 20 48 45 4c 50 46 49 | The HELPFI| 00000300 4c 45 20 20 70 72 6f 67 72 61 6d 20 20 63 61 6e |LE program can| 00000310 20 20 62 65 20 20 75 73 65 64 20 20 74 6f 20 20 | be used to | 00000320 63 72 65 61 74 65 20 20 79 6f 75 72 20 20 6f 77 |create your ow| 00000330 6e 0d 63 75 73 74 6f 6d 69 73 65 64 20 73 69 64 |n.customised sid| 00000340 65 77 61 79 73 20 72 61 6d 20 2a 48 45 4c 50 20 |eways ram *HELP | 00000350 66 61 63 69 6c 69 74 79 2e 20 4f 6e 20 20 72 75 |facility. On ru| 00000360 6e 6e 69 6e 67 20 20 74 68 65 20 20 70 72 6f 67 |nning the prog| 00000370 72 61 6d 20 20 79 6f 75 0d 77 69 6c 6c 20 20 62 |ram you.will b| 00000380 65 20 20 70 72 65 73 65 6e 74 65 64 20 20 77 69 |e presented wi| 00000390 74 68 20 20 61 20 6d 65 6e 75 2c 20 74 6f 20 73 |th a menu, to s| 000003a0 74 61 72 74 20 63 72 65 61 74 69 6e 67 20 79 6f |tart creating yo| 000003b0 75 72 20 6f 77 6e 20 68 65 6c 70 66 69 6c 65 0d |ur own helpfile.| 000003c0 63 68 6f 6f 73 65 20 6f 70 74 69 6f 6e 20 31 2c |choose option 1,| 000003d0 20 74 68 69 73 20 73 65 74 73 20 75 70 20 61 20 | this sets up a | 000003e0 72 61 6e 64 6f 6d 20 61 63 63 65 73 73 20 64 69 |random access di| 000003f0 73 63 20 66 69 6c 65 20 77 68 69 63 68 20 77 69 |sc file which wi| 00000400 6c 6c 20 20 62 65 0d 75 73 65 64 20 20 74 6f 20 |ll be.used to | 00000410 20 73 74 6f 72 65 20 20 74 68 65 20 20 64 61 74 | store the dat| 00000420 61 20 20 6e 65 65 64 65 64 20 74 6f 20 63 72 65 |a needed to cre| 00000430 61 74 65 20 74 68 65 20 66 69 6e 61 6c 20 72 6f |ate the final ro| 00000440 6d 20 69 6d 61 67 65 2e 20 54 68 69 73 0d 72 61 |m image. This.ra| 00000450 6e 64 6f 6d 20 61 63 63 65 73 73 20 66 69 6c 65 |ndom access file| 00000460 20 69 73 20 62 72 6f 6b 65 6e 20 75 70 20 69 6e | is broken up in| 00000470 74 6f 20 20 73 65 63 74 69 6f 6e 73 2c 20 20 6f |to sections, o| 00000480 6e 65 20 20 66 6f 72 20 20 65 61 63 68 20 20 2a |ne for each *| 00000490 48 45 4c 50 0d 63 6f 6d 6d 61 6e 64 2c 20 20 79 |HELP.command, y| 000004a0 6f 75 20 63 61 6e 20 73 65 65 20 74 68 65 6d 20 |ou can see them | 000004b0 62 65 69 6e 67 20 63 6f 75 6e 74 65 64 20 6f 66 |being counted of| 000004c0 66 20 6f 6e 20 74 68 65 20 73 63 72 65 65 6e 20 |f on the screen | 000004d0 61 73 20 74 68 65 20 66 69 6c 65 0d 69 73 20 63 |as the file.is c| 000004e0 72 65 61 74 65 64 2e 20 57 68 65 6e 20 74 68 65 |reated. When the| 000004f0 20 63 6f 75 6e 74 20 72 65 61 63 68 65 73 20 74 | count reaches t| 00000500 68 65 20 6d 61 78 69 6d 75 6d 20 6e 75 6d 62 65 |he maximum numbe| 00000510 72 20 6f 66 20 20 66 69 6c 65 73 20 20 28 31 35 |r of files (15| 00000520 30 29 0d 79 6f 75 20 20 77 69 6c 6c 20 20 74 68 |0).you will th| 00000530 65 6e 20 20 62 65 20 20 70 72 65 73 65 6e 74 65 |en be presente| 00000540 64 20 77 69 74 68 20 74 68 65 20 65 64 69 74 69 |d with the editi| 00000550 6e 67 20 73 63 72 65 65 6e 2e 20 4e 6f 74 65 20 |ng screen. Note | 00000560 74 68 61 74 20 74 68 69 73 0d 66 69 6c 65 20 69 |that this.file i| 00000570 73 20 6e 65 61 72 6c 79 20 74 77 69 63 65 20 61 |s nearly twice a| 00000580 73 20 6c 6f 6e 67 20 28 61 6c 6d 6f 73 74 20 33 |s long (almost 3| 00000590 32 4b 29 20 61 73 20 74 68 65 20 6d 61 78 69 6d |2K) as the maxim| 000005a0 75 6d 20 73 69 7a 65 20 20 6f 66 20 20 72 6f 6d |um size of rom| 000005b0 0d 69 6d 61 67 65 20 20 62 65 69 6e 67 20 20 63 |.image being c| 000005c0 72 65 61 74 65 64 20 28 31 36 6b 29 2c 20 74 68 |reated (16k), th| 000005d0 69 73 20 69 73 20 62 65 63 61 75 73 65 20 65 61 |is is because ea| 000005e0 63 68 20 63 6f 6d 6d 61 6e 64 20 69 73 20 69 6e |ch command is in| 000005f0 69 74 69 61 6c 6c 79 0d 61 6c 6c 6f 77 65 64 20 |itially.allowed | 00000600 6d 65 73 73 61 67 65 20 73 70 61 63 65 20 6f 66 |message space of| 00000610 20 35 20 6c 69 6e 65 73 20 6f 66 20 20 34 30 20 | 5 lines of 40 | 00000620 20 63 68 61 72 61 63 74 65 72 73 2e 20 20 57 68 | characters. Wh| 00000630 65 6e 20 20 74 68 65 20 20 66 69 6e 61 6c 0d 68 |en the final.h| 00000640 65 6c 70 66 69 6c 65 20 20 69 73 20 20 63 72 65 |elpfile is cre| 00000650 61 74 65 64 20 20 61 6c 6c 20 74 68 65 20 75 6e |ated all the un| 00000660 77 61 6e 74 65 64 20 73 70 61 63 65 73 20 61 72 |wanted spaces ar| 00000670 65 20 72 65 6d 6f 76 65 64 2c 20 74 68 65 20 65 |e removed, the e| 00000680 64 69 74 6f 72 0d 69 6e 63 6c 75 64 65 73 20 61 |ditor.includes a| 00000690 20 62 79 74 65 20 63 6f 75 6e 74 20 63 6f 6e 73 | byte count cons| 000006a0 74 61 6e 74 6c 79 20 75 70 64 61 74 65 64 20 6f |tantly updated o| 000006b0 6e 20 74 68 65 20 73 63 72 65 65 6e 20 74 6f 20 |n the screen to | 000006c0 68 65 6c 70 20 79 6f 75 20 75 73 65 0d 74 68 65 |help you use.the| 000006d0 20 61 76 61 69 6c 61 62 6c 65 20 73 70 61 63 65 | available space| 000006e0 20 65 66 66 69 63 69 65 6e 74 6c 79 2e 0d 0d 20 | efficiently... | 000006f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000700 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 45 | E| 00000710 44 49 54 4f 52 0d 0d 20 20 20 20 20 20 20 20 20 |DITOR.. | 00000720 20 54 68 65 20 65 64 69 74 6f 72 20 69 73 20 65 | The editor is e| 00000730 6e 74 65 72 65 64 20 61 74 20 63 6f 6d 6d 61 6e |ntered at comman| 00000740 64 20 6e 75 6d 62 65 72 20 31 2c 20 79 6f 75 20 |d number 1, you | 00000750 77 69 6c 6c 20 73 65 65 20 20 74 68 65 0d 63 75 |will see the.cu| 00000760 72 73 6f 72 20 6f 6e 20 74 68 65 20 63 6f 6d 6d |rsor on the comm| 00000770 61 6e 64 20 6c 69 6e 65 2c 20 62 65 6c 6f 77 20 |and line, below | 00000780 74 68 69 73 20 74 68 65 72 65 20 61 72 65 20 35 |this there are 5| 00000790 20 6c 69 6e 65 73 20 66 6f 72 20 74 79 70 69 6e | lines for typin| 000007a0 67 20 69 6e 0d 74 68 65 20 6d 65 73 73 61 67 65 |g in.the message| 000007b0 20 74 6f 20 62 65 20 64 69 73 70 6c 61 79 65 64 | to be displayed| 000007c0 2e 20 41 74 20 74 68 65 20 74 6f 70 20 72 69 67 |. At the top rig| 000007d0 68 74 20 74 68 65 20 6e 75 6d 62 65 72 20 6f 66 |ht the number of| 000007e0 20 62 79 74 65 73 20 6c 65 66 74 0d 69 73 20 20 | bytes left.is | 000007f0 64 69 73 70 6c 61 79 65 64 2c 20 20 74 68 69 73 |displayed, this| 00000800 20 20 73 68 6f 75 6c 64 20 20 72 65 61 64 20 31 | should read 1| 00000810 36 31 35 37 20 66 6f 72 20 61 20 6e 65 77 20 62 |6157 for a new b| 00000820 6c 61 6e 6b 20 66 69 6c 65 2e 20 55 73 65 20 74 |lank file. Use t| 00000830 68 65 0d 63 75 72 73 6f 72 20 6b 65 79 73 20 74 |he.cursor keys t| 00000840 6f 20 6d 6f 76 65 20 61 72 6f 75 6e 64 20 74 68 |o move around th| 00000850 65 20 73 63 72 65 65 6e 2c 20 61 6e 79 74 68 69 |e screen, anythi| 00000860 6e 67 20 74 79 70 65 64 20 77 69 6c 6c 20 20 65 |ng typed will e| 00000870 69 74 68 65 72 20 20 62 65 0d 69 6e 73 65 72 74 |ither be.insert| 00000880 65 64 20 20 61 74 20 74 68 65 20 63 75 72 73 6f |ed at the curso| 00000890 72 20 70 6f 73 69 74 69 6f 6e 20 6f 72 20 77 69 |r position or wi| 000008a0 6c 6c 20 6f 76 65 72 77 72 69 74 65 20 63 75 72 |ll overwrite cur| 000008b0 72 65 6e 74 20 74 65 78 74 20 61 74 20 74 68 65 |rent text at the| 000008c0 0d 63 75 72 73 6f 72 20 70 6f 73 69 74 69 6f 6e |.cursor position| 000008d0 2e 20 59 6f 75 20 63 61 6e 20 74 6f 67 67 6c 65 |. You can toggle| 000008e0 20 62 65 74 77 65 65 6e 20 69 6e 73 65 72 74 20 | between insert | 000008f0 61 6e 64 20 20 6f 76 65 72 20 20 6d 6f 64 65 73 |and over modes| 00000900 20 20 75 73 69 6e 67 0d 74 68 65 20 20 3c 43 4f | using.the <CO| 00000910 50 59 3e 20 20 6b 65 79 2c 20 20 74 68 65 20 63 |PY> key, the c| 00000920 75 72 72 65 6e 74 20 73 74 61 74 65 20 6f 66 20 |urrent state of | 00000930 74 68 69 73 20 73 77 69 74 63 68 20 62 65 69 6e |this switch bein| 00000940 67 20 64 69 73 70 6c 61 79 65 64 20 61 74 0d 74 |g displayed at.t| 00000950 68 65 20 62 6f 74 74 6f 6d 20 72 69 67 68 74 20 |he bottom right | 00000960 6f 66 20 74 68 65 20 73 63 72 65 65 6e 2e 20 43 |of the screen. C| 00000970 6f 6d 6d 61 6e 64 73 20 68 61 76 65 20 61 20 6d |ommands have a m| 00000980 61 78 69 6d 75 6d 20 6c 65 6e 67 74 68 20 6f 66 |aximum length of| 00000990 20 20 74 65 6e 0d 6c 65 74 74 65 72 73 20 20 61 | ten.letters a| 000009a0 6e 64 20 61 72 65 20 61 75 74 6f 6d 61 74 69 63 |nd are automatic| 000009b0 61 6c 6c 79 20 72 65 73 74 72 69 63 74 65 64 20 |ally restricted | 000009c0 62 79 20 74 68 65 20 65 64 69 74 6f 72 20 74 6f |by the editor to| 000009d0 20 75 70 70 65 72 20 63 61 73 65 2c 0d 6e 75 6d | upper case,.num| 000009e0 62 65 72 73 20 61 6e 64 20 74 68 65 20 63 68 61 |bers and the cha| 000009f0 72 61 63 74 65 72 73 3a 2d 20 20 2f 3c 3d 3e 3f |racters:- /<=>?| 00000a00 40 5b 5c 5d 5e 5f 23 20 20 69 2e 65 2e 20 20 63 |@[\]^_# i.e. c| 00000a10 68 61 72 61 63 74 65 72 73 20 20 6e 75 6d 62 65 |haracters numbe| 00000a20 72 65 64 0d 66 72 6f 6d 20 20 34 37 20 20 74 6f |red.from 47 to| 00000a30 20 20 39 36 2e 20 20 54 68 69 73 20 20 69 73 20 | 96. This is | 00000a40 6e 6f 74 20 6f 6e 6c 79 20 74 6f 20 65 6c 69 6d |not only to elim| 00000a50 69 6e 61 74 65 20 63 68 61 72 61 63 74 65 72 73 |inate characters| 00000a60 20 77 68 69 63 68 20 42 42 43 0d 42 61 73 69 63 | which BBC.Basic| 00000a70 20 20 6d 69 67 68 74 20 20 6d 69 73 69 6e 74 65 | might misinte| 00000a80 72 70 72 65 74 20 20 62 75 74 20 20 61 6c 73 6f |rpret but also| 00000a90 20 20 62 65 63 61 75 73 65 20 20 2a 48 45 4c 50 | because *HELP| 00000aa0 20 20 20 63 6f 6d 6d 61 6e 64 73 20 20 20 61 72 | commands ar| 00000ab0 65 0d 61 75 74 6f 6d 61 74 69 63 61 6c 6c 79 20 |e.automatically | 00000ac0 20 63 6f 6e 76 65 72 74 65 64 20 20 74 6f 20 75 | converted to u| 00000ad0 70 70 65 72 20 63 61 73 65 20 61 6e 64 20 77 6f |pper case and wo| 00000ae0 75 6c 64 20 6e 6f 74 20 62 65 20 72 65 63 6f 67 |uld not be recog| 00000af0 6e 69 73 65 64 20 69 66 0d 74 68 65 20 72 6f 6d |nised if.the rom| 00000b00 20 69 6d 61 67 65 20 20 63 6f 6e 74 61 69 6e 65 | image containe| 00000b10 64 20 20 6c 6f 77 65 72 20 20 63 61 73 65 20 20 |d lower case | 00000b20 63 6f 6d 6d 61 6e 64 73 2e 20 20 54 68 65 20 20 |commands. The | 00000b30 61 63 74 75 61 6c 20 20 6d 65 73 73 61 67 65 0d |actual message.| 00000b40 64 69 73 70 6c 61 79 65 64 20 6f 6e 20 74 68 65 |displayed on the| 00000b50 20 73 63 72 65 65 6e 20 69 73 20 6e 6f 74 20 6c | screen is not l| 00000b60 69 6d 69 74 65 64 20 69 6e 20 74 68 69 73 20 77 |imited in this w| 00000b70 61 79 20 61 6e 64 20 63 61 6e 20 63 6f 6e 74 61 |ay and can conta| 00000b80 69 6e 20 61 6e 79 0d 74 79 70 61 62 6c 65 20 63 |in any.typable c| 00000b90 68 61 72 61 63 74 65 72 2c 20 69 2e 65 2e 20 63 |haracter, i.e. c| 00000ba0 68 61 72 61 63 74 65 72 20 6e 75 6d 62 65 72 73 |haracter numbers| 00000bb0 20 33 32 20 74 6f 20 31 32 36 2e 0d 0d 20 20 20 | 32 to 126... | 00000bc0 20 20 20 20 20 20 20 45 61 63 68 20 6c 69 6e 65 | Each line| 00000bd0 20 6f 66 20 74 65 78 74 20 68 61 73 20 61 20 6c | of text has a l| 00000be0 69 6e 65 20 6c 69 6d 69 74 65 72 20 61 74 20 74 |ine limiter at t| 00000bf0 68 65 20 65 6e 64 20 22 7c 22 2c 20 74 68 69 73 |he end "|", this| 00000c00 20 69 73 0d 74 68 65 72 65 20 73 6f 20 74 68 61 | is.there so tha| 00000c10 74 20 79 6f 75 20 63 61 6e 20 22 73 65 65 22 20 |t you can "see" | 00000c20 61 6e 79 20 62 6c 61 6e 6b 20 73 70 61 63 65 73 |any blank spaces| 00000c30 20 6f 6e 20 61 20 6c 69 6e 65 2e 20 54 68 65 20 | on a line. 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There are | 00001b60 6e 6f 0d 69 6c 6c 65 67 61 6c 20 20 70 65 65 6b |no.illegal peek| 00001b70 73 20 20 6f 72 20 20 70 6f 6b 65 73 2c 20 20 61 |s or pokes, a| 00001b80 6e 64 20 20 6f 6e 6c 79 20 77 65 6c 6c 20 64 6f |nd only well do| 00001b90 63 75 6d 65 6e 74 65 64 20 6f 70 65 72 61 74 69 |cumented operati| 00001ba0 6e 67 20 73 79 73 74 65 6d 0d 63 61 6c 6c 73 20 |ng system.calls | 00001bb0 61 72 65 20 75 73 65 64 20 73 6f 20 69 74 20 73 |are used so it s| 00001bc0 68 6f 75 6c 64 20 77 6f 72 6b 20 77 69 74 68 20 |hould work with | 00001bd0 61 6c 6c 20 42 42 43 20 74 79 70 65 20 6d 61 63 |all BBC type mac| 00001be0 68 69 6e 65 73 20 20 69 6e 63 6c 75 64 69 6e 67 |hines including| 00001bf0 0d 74 68 65 20 45 4c 45 43 54 52 4f 4e 20 61 6e |.the ELECTRON an| 00001c00 64 20 43 4f 4d 50 41 43 54 2e 0d 0d 20 20 20 20 |d COMPACT... | 00001c10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001c20 20 20 20 20 20 20 20 20 20 20 20 20 46 58 48 45 | FXHE| 00001c30 4c 50 0d 0d 20 20 20 20 20 20 20 20 20 20 42 72 |LP.. Br| 00001c40 6f 61 64 63 61 73 74 20 20 77 69 74 68 20 74 68 |oadcast with th| 00001c50 69 73 20 70 72 6f 67 72 61 6d 20 69 73 20 61 6e |is program is an| 00001c60 20 65 78 61 6d 70 6c 65 20 68 65 6c 70 66 69 6c | example helpfil| 00001c70 65 20 28 46 58 48 45 4c 50 29 0d 74 6f 67 65 74 |e (FXHELP).toget| 00001c80 68 65 72 20 77 69 74 68 20 74 68 65 20 64 61 74 |her with the dat| 00001c90 61 66 69 6c 65 20 75 73 65 64 20 69 6e 20 69 74 |afile used in it| 00001ca0 73 20 63 72 65 61 74 69 6f 6e 20 28 46 58 44 41 |s creation (FXDA| 00001cb0 54 41 29 2e 20 20 54 68 69 73 20 20 67 69 76 65 |TA). 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.