Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_29.ADF » F/+JAFA1
F/+JAFA1
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_29.ADF |
| Filename: | F/+JAFA1 |
| Read OK: | ✔ |
| File size: | 1B17 bytes |
| Load address: | 14A20 |
| Exec address: | 20D41 |
File contents
�.........*.......*.......*.......*.......*.......*.......*.......*.....<
**********************************************************************
ROM - JAFA Mode7 Mk.2 v2.1
ROM - JAFA Simulator vS1.4
Tony Boarer 214 Dunraven Drive Derriford Plymouth PL6 6AZ 01752 771276
**********************************************************************
As I have said before I have a lot of software and items that I have
picked up in job lots, and I still have to sort out and install to see
what I can do with it. Having the EUG published bi-monthly gives me an
incentive to do this - hence the above title.
When writing items for the EUG I am conscious,
1) that a lot of members know far more about computing than I
do - especially in programming,
2) that some members will have the software/equipment that I
write about, and
3) that I hope what I do write about will be interesting and
useful to some members.
Having got that off my chest the following few notes are about the
above two ROM's that I am currently experimenting with to see what can
be produced. One thing that I have just found a few moments ago is
that if I am in MODE7 then trying to go to CLICK crashes the computer
- one has to go to, say, MODE6 then *CLI.
Another thing I have just found is that if the Simulator ROM is left
live whilst in VIEW and there is a crash then the computer goes to
MODE7 when brought back on line, though the VIEW programme is not
lost. Normally I would have the ROM killed by CLICK whilst using VIEW.
The computer I am currently using is not fitted with the Mk.2 unit
which has a special board inside the Electron, though I do have
another Electron so fitted. I have the full 16 pages with this
Electrom and can call up both ROM's - the Mk.2 in page 13 and the
Simulator in page 1. To get to MODE7 both ROM'S have the same command
*MODE7ON/BREAK, and therefore the Mk.2 should take precedence. Just to
see what would happen on the command *MODE7ON/BREAK I brought both
ROM's live into the system and issued the command - the computer does
not crash but goes straight to the MODE7 with the Simulator ROM.
However, I normally would have page 13 killed via CLICK until I need a
specific ROM in the ROM128.
According to the manuals both ROM's are better used with the Master
Ram Board, and both ROM's will work with the BBC ROM Wordwise+ word
processor.
What I am experimenting with at present is seeing what I do with the
Teletext control codes. Here one also needs the BBC User Guide for
JAFA assumes anyone using MODE7 on the Electron will be familiar with
the BBC computer! Not necessarily so! I do find using the codes is a
bit tedious, but patience is a virtue. One good thing is that there
are tables in the back of the User Guide that give codes for the
Teletext Displayed Graphic Characters, and the Teletext Displayed
Alphanumeric Characters. However, codes can be calculated as follows:-
________________
| | |
(1) | 1 | 2 | (2)
|_______|_______|
| | |
(3) | 4 | 8 | (4)
|_______|_______|
| | |
(5) | 16 | 64 | (6)
|_______|_______|
The graphic shapes are calculated from a combination of a selection of
squares from a 2 by 3 grid and each square has a value as shown above.
I have numbered the squares from (1) to (6) for ease of description.
Say that one wanted a shape made up of squares (2),(4) and (5). The
code shown in the table for this is 186. It is calculated by adding up
the value of the squares selected and then adding 32 and 128, thus
2+8+16+32+128 = 186
Having selected this shape we can print it out anywhere on the screen
and in a selected colour, say, red. The code for red in graphics is
145. Thus,
PRINT TAB(X,Y);CHR$(145);CHR$(154);CHR$(186)
will do the trick. Code 154 is necessary for separated graphics. The
background colour can also be changed by a slightly more elaborate
procedure. You can begin to see how the programming becomes a little
tedious! It is easier, I think, to use the VDU format, thus two lines
of programme:-
PRINT TAB(X,Y);
VDU 145,154,186 , will print the red shape at X,Y.
The MODE7 screen is X, 0 to 39, and Y, 0 to 24. 0,0 is the top left
hand corner.
It follows that the highest code is for whole block at 255, thus
1+2+4+8+16+64+32+128 = 255 , and the lowest
161 for just square (1). Code 160 is no square selection at at all
though it could be printed by suitable colour selection.
A lot of the codes below 160 do nothing at all, but others operate the
printer, produce double height letters, produce colours (steady or
flashing), produce beeps, move the cursor around (useful in making up
pictures using the coded shapes) and other functions. So one can begin
to see that pictures like ITV's Bamber Boozler can easily be produced
- even if, as I have said, the programming is a bit tedious - at least
first time round. I can see that with time one could build up a series
of connected shapes to use to make pictures and keep them on disk to
bring into programmes as and when required.
It is interesting to note that colour selection requires differing
codes for the same colour depending whether alphanumeric or graphics
is operable.
Another point is that there are no MOVE or DRAW commands in MODE7.
Separate procedures have to be written to produce lines or curves.
ROM commands.
The following * commands are common to both ROM's:-
1) MODE7ON and MODE7OFF
2) MODE7. Toggles between the two.
3) EFN Interpret function keys as Electron function keys.
4) BFN Interpret function keys as BBC micro SHIFT/CTRL function
keys. This is the default when the ROM's are active.
5) MCOMM If one has the required additional equipment Prestel
can be dialled up.
6) TELETEXT Again if the required equipment is available
TELETEXT can be received. (I have the equipment for this for the BBC
Micro).
The following commands are appropriate to the Simulator ROM only:-
1) MRAP Select rapid updating mode. The default with WORDWISE
or the Master Ram Board active.
2) MNORM Select normal updating mode. The default when neither
WORDWISE or the Master Ram Board are active.
The following commands are appropriateto the Mk.2 ROM only:-
1) GREEN Select green screen monitor mode.
2) MED This is demonstration screen editor and edited screens
can be SAVEed if required.
Additionally, when both ROM's are active they respond to:-
1) *HELP BARS Gives colour bars on the monitor to facilitate
colour adjustment and contrast.
2) *TVn If n=1 display is moved up. If n=254 display is moved
down. But unlike the BBC lines are lost with the Electron.
Here endeth the lesson by the Elder(ly) Novice!
00000000 81 2e 2e 2e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |..........*.....| 00000010 2e 2e 2a 2e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |..*.......*.....| * 00000040 2e 2e 2a 2e 2e 2e 2e 2e 3c 20 20 20 20 0d 2a 2a |..*.....< .**| 00000050 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000090 2a 2a 2a 2a 0d 20 20 20 20 20 20 20 20 20 20 20 |****. | 000000a0 20 20 20 20 20 20 20 20 20 20 20 52 4f 4d 20 2d | ROM -| 000000b0 20 4a 41 46 41 20 4d 6f 64 65 37 20 4d 6b 2e 32 | JAFA Mode7 Mk.2| 000000c0 20 76 32 2e 31 0d 20 20 20 20 20 20 20 20 20 20 | v2.1. | 000000d0 20 20 20 20 20 20 20 20 20 20 20 20 52 4f 4d 20 | ROM | 000000e0 2d 20 4a 41 46 41 20 53 69 6d 75 6c 61 74 6f 72 |- JAFA Simulator| 000000f0 20 76 53 31 2e 34 0d 54 6f 6e 79 20 42 6f 61 72 | vS1.4.Tony Boar| 00000100 65 72 20 32 31 34 20 44 75 6e 72 61 76 65 6e 20 |er 214 Dunraven | 00000110 44 72 69 76 65 20 44 65 72 72 69 66 6f 72 64 20 |Drive Derriford | 00000120 50 6c 79 6d 6f 75 74 68 20 50 4c 36 20 36 41 5a |Plymouth PL6 6AZ| 00000130 20 30 31 37 35 32 20 37 37 31 32 37 36 0d 2a 2a | 01752 771276.**| 00000140 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000180 2a 2a 2a 2a 0d 41 73 1a 20 49 1a 20 68 61 76 65 |****.As. I. have| 00000190 20 73 61 69 64 20 62 65 66 6f 72 65 20 49 20 68 | said before I h| 000001a0 61 76 65 20 61 20 6c 6f 74 20 6f 66 20 73 6f 66 |ave a lot of sof| 000001b0 74 77 61 72 65 20 61 6e 64 20 69 74 65 6d 73 20 |tware and items | 000001c0 74 68 61 74 20 49 20 68 61 76 65 0d 70 69 63 6b |that I have.pick| 000001d0 65 64 20 75 70 20 69 6e 20 6a 6f 62 20 6c 6f 74 |ed up in job lot| 000001e0 73 2c 20 61 6e 64 20 49 20 73 74 69 6c 6c 20 68 |s, and I still h| 000001f0 61 76 65 20 74 6f 20 73 6f 72 74 20 6f 75 74 20 |ave to sort out | 00000200 61 6e 64 20 69 6e 73 74 61 6c 6c 20 74 6f 20 73 |and install to s| 00000210 65 65 0d 77 68 61 74 20 49 20 63 61 6e 20 64 6f |ee.what I can do| 00000220 20 77 69 74 68 20 69 74 2e 20 48 61 76 69 6e 67 | with it. Having| 00000230 20 74 68 65 20 45 55 47 20 70 75 62 6c 69 73 68 | the EUG publish| 00000240 65 64 20 62 69 2d 6d 6f 6e 74 68 6c 79 20 67 69 |ed bi-monthly gi| 00000250 76 65 73 20 6d 65 20 61 6e 0d 69 6e 63 65 6e 74 |ves me an.incent| 00000260 69 76 65 20 74 6f 20 64 6f 20 74 68 69 73 20 2d |ive to do this -| 00000270 20 68 65 6e 63 65 20 74 68 65 20 61 62 6f 76 65 | hence the above| 00000280 20 74 69 74 6c 65 2e 0d 57 68 65 6e 20 77 72 69 | title..When wri| 00000290 74 69 6e 67 20 69 74 65 6d 73 20 66 6f 72 20 74 |ting items for t| 000002a0 68 65 20 45 55 47 20 49 20 61 6d 20 63 6f 6e 73 |he EUG I am cons| 000002b0 63 69 6f 75 73 2c 0d 09 31 29 20 74 68 61 74 20 |cious,..1) that | 000002c0 61 1a 20 6c 6f 74 1a 20 6f 66 20 6d 65 6d 62 65 |a. lot. of membe| 000002d0 72 73 20 6b 6e 6f 77 20 66 61 72 20 6d 6f 72 65 |rs know far more| 000002e0 20 61 62 6f 75 74 20 63 6f 6d 70 75 74 69 6e 67 | about computing| 000002f0 20 74 68 61 6e 20 49 0d 64 6f 20 2d 20 65 73 70 | than I.do - esp| 00000300 65 63 69 61 6c 6c 79 20 69 6e 20 70 72 6f 67 72 |ecially in progr| 00000310 61 6d 6d 69 6e 67 2c 0d 09 32 29 20 74 68 61 74 |amming,..2) that| 00000320 20 73 6f 6d 65 20 6d 65 6d 62 65 72 73 20 77 69 | some members wi| 00000330 6c 6c 1a 20 68 61 76 65 1a 20 74 68 65 1a 20 73 |ll. have. the. s| 00000340 6f 66 74 77 61 72 65 2f 65 71 75 69 70 6d 65 6e |oftware/equipmen| 00000350 74 20 74 68 61 74 20 49 0d 77 72 69 74 65 20 61 |t that I.write a| 00000360 62 6f 75 74 2c 20 61 6e 64 20 0d 09 33 29 20 74 |bout, and ..3) t| 00000370 68 61 74 20 49 20 68 6f 70 65 20 77 68 61 74 20 |hat I hope what | 00000380 49 20 64 6f 20 77 72 69 74 65 1a 20 61 62 6f 75 |I do write. abou| 00000390 74 1a 20 77 69 6c 6c 1a 20 62 65 20 69 6e 74 65 |t. will. be inte| 000003a0 72 65 73 74 69 6e 67 20 61 6e 64 0d 75 73 65 66 |resting and.usef| 000003b0 75 6c 20 74 6f 20 73 6f 6d 65 20 6d 65 6d 62 65 |ul to some membe| 000003c0 72 73 2e 0d 48 61 76 69 6e 67 1a 20 67 6f 74 1a |rs..Having. got.| 000003d0 20 74 68 61 74 20 6f 66 66 20 6d 79 20 63 68 65 | that off my che| 000003e0 73 74 20 74 68 65 20 66 6f 6c 6c 6f 77 69 6e 67 |st the following| 000003f0 20 66 65 77 20 6e 6f 74 65 73 20 61 72 65 1a 20 | few notes are. | 00000400 61 62 6f 75 74 1a 20 74 68 65 0d 61 62 6f 76 65 |about. the.above| 00000410 20 74 77 6f 20 52 4f 4d 27 73 20 74 68 61 74 20 | two ROM's that | 00000420 49 20 61 6d 20 63 75 72 72 65 6e 74 6c 79 20 65 |I am currently e| 00000430 78 70 65 72 69 6d 65 6e 74 69 6e 67 20 77 69 74 |xperimenting wit| 00000440 68 20 74 6f 20 73 65 65 20 77 68 61 74 20 63 61 |h to see what ca| 00000450 6e 0d 62 65 20 70 72 6f 64 75 63 65 64 2e 20 4f |n.be produced. O| 00000460 6e 65 1a 20 74 68 69 6e 67 1a 20 74 68 61 74 1a |ne. thing. that.| 00000470 20 49 1a 20 68 61 76 65 20 6a 75 73 74 20 66 6f | I. have just fo| 00000480 75 6e 64 20 61 20 66 65 77 20 6d 6f 6d 65 6e 74 |und a few moment| 00000490 73 20 61 67 6f 20 69 73 0d 74 68 61 74 20 69 66 |s ago is.that if| 000004a0 20 49 20 61 6d 20 69 6e 20 4d 4f 44 45 37 20 74 | I am in MODE7 t| 000004b0 68 65 6e 1a 20 74 72 79 69 6e 67 20 74 6f 20 67 |hen. trying to g| 000004c0 6f 20 74 6f 20 43 4c 49 43 4b 20 63 72 61 73 68 |o to CLICK crash| 000004d0 65 73 20 74 68 65 20 63 6f 6d 70 75 74 65 72 0d |es the computer.| 000004e0 2d 20 6f 6e 65 20 68 61 73 20 74 6f 20 67 6f 20 |- one has to go | 000004f0 74 6f 2c 20 73 61 79 2c 20 4d 4f 44 45 36 20 74 |to, say, MODE6 t| 00000500 68 65 6e 20 2a 43 4c 49 2e 0d 41 6e 6f 74 68 65 |hen *CLI..Anothe| 00000510 72 1a 20 74 68 69 6e 67 1a 20 49 20 68 61 76 65 |r. thing. I have| 00000520 20 6a 75 73 74 20 66 6f 75 6e 64 20 69 73 20 74 | just found is t| 00000530 68 61 74 20 69 66 20 74 68 65 20 53 69 6d 75 6c |hat if the Simul| 00000540 61 74 6f 72 20 52 4f 4d 20 69 73 20 6c 65 66 74 |ator ROM is left| 00000550 0d 6c 69 76 65 20 77 68 69 6c 73 74 20 69 6e 1a |.live whilst in.| 00000560 20 56 49 45 57 1a 20 61 6e 64 1a 20 74 68 65 72 | VIEW. and. ther| 00000570 65 1a 20 69 73 20 61 20 63 72 61 73 68 20 74 68 |e. is a crash th| 00000580 65 6e 20 74 68 65 20 63 6f 6d 70 75 74 65 72 20 |en the computer | 00000590 67 6f 65 73 20 74 6f 0d 4d 4f 44 45 37 20 77 68 |goes to.MODE7 wh| 000005a0 65 6e 20 62 72 6f 75 67 68 74 20 62 61 63 6b 20 |en brought back | 000005b0 6f 6e 20 6c 69 6e 65 2c 20 74 68 6f 75 67 68 1a |on line, though.| 000005c0 20 74 68 65 1a 20 56 49 45 57 1a 20 70 72 6f 67 | the. VIEW. prog| 000005d0 72 61 6d 6d 65 1a 20 69 73 1a 20 6e 6f 74 0d 6c |ramme. is. not.l| 000005e0 6f 73 74 2e 20 4e 6f 72 6d 61 6c 6c 79 20 49 20 |ost. Normally I | 000005f0 77 6f 75 6c 64 20 68 61 76 65 20 74 68 65 20 52 |would have the R| 00000600 4f 4d 20 6b 69 6c 6c 65 64 20 62 79 20 43 4c 49 |OM killed by CLI| 00000610 43 4b 20 77 68 69 6c 73 74 20 75 73 69 6e 67 20 |CK whilst using | 00000620 56 49 45 57 2e 0d 54 68 65 20 63 6f 6d 70 75 74 |VIEW..The comput| 00000630 65 72 20 49 20 61 6d 20 63 75 72 72 65 6e 74 6c |er I am currentl| 00000640 79 20 75 73 69 6e 67 20 69 73 20 6e 6f 74 1a 20 |y using is not. | 00000650 66 69 74 74 65 64 1a 20 77 69 74 68 1a 20 74 68 |fitted. with. th| 00000660 65 1a 20 4d 6b 2e 32 20 75 6e 69 74 0d 77 68 69 |e. Mk.2 unit.whi| 00000670 63 68 1a 20 68 61 73 1a 20 61 1a 20 73 70 65 63 |ch. has. a. spec| 00000680 69 61 6c 1a 20 62 6f 61 72 64 1a 20 69 6e 73 69 |ial. board. insi| 00000690 64 65 1a 20 74 68 65 1a 20 45 6c 65 63 74 72 6f |de. the. Electro| 000006a0 6e 2c 20 74 68 6f 75 67 68 20 49 20 64 6f 20 68 |n, though I do h| 000006b0 61 76 65 0d 61 6e 6f 74 68 65 72 1a 20 45 6c 65 |ave.another. Ele| 000006c0 63 74 72 6f 6e 1a 20 73 6f 1a 20 66 69 74 74 65 |ctron. so. fitte| 000006d0 64 2e 1a 20 49 20 68 61 76 65 20 74 68 65 20 66 |d.. I have the f| 000006e0 75 6c 6c 1a 20 31 36 1a 20 70 61 67 65 73 1a 20 |ull. 16. pages. | 000006f0 77 69 74 68 1a 20 74 68 69 73 0d 45 6c 65 63 74 |with. this.Elect| 00000700 72 6f 6d 20 61 6e 64 20 63 61 6e 20 63 61 6c 6c |rom and can call| 00000710 20 75 70 1a 20 62 6f 74 68 1a 20 52 4f 4d 27 73 | up. both. ROM's| 00000720 1a 20 2d 1a 20 74 68 65 1a 20 4d 6b 2e 32 20 69 |. -. the. Mk.2 i| 00000730 6e 20 70 61 67 65 20 31 33 20 61 6e 64 20 74 68 |n page 13 and th| 00000740 65 0d 53 69 6d 75 6c 61 74 6f 72 20 69 6e 20 70 |e.Simulator in p| 00000750 61 67 65 20 31 2e 20 54 6f 20 67 65 74 20 74 6f |age 1. To get to| 00000760 20 4d 4f 44 45 37 20 62 6f 74 68 20 52 4f 4d 27 | MODE7 both ROM'| 00000770 53 20 68 61 76 65 1a 20 74 68 65 20 73 61 6d 65 |S have. the same| 00000780 20 63 6f 6d 6d 61 6e 64 0d 2a 4d 4f 44 45 37 4f | command.*MODE7O| 00000790 4e 2f 42 52 45 41 4b 2c 20 61 6e 64 20 74 68 65 |N/BREAK, and the| 000007a0 72 65 66 6f 72 65 20 74 68 65 20 4d 6b 2e 32 20 |refore the Mk.2 | 000007b0 73 68 6f 75 6c 64 20 74 61 6b 65 20 70 72 65 63 |should take prec| 000007c0 65 64 65 6e 63 65 2e 20 4a 75 73 74 20 74 6f 0d |edence. Just to.| 000007d0 73 65 65 1a 20 77 68 61 74 1a 20 77 6f 75 6c 64 |see. what. would| 000007e0 1a 20 68 61 70 70 65 6e 1a 20 6f 6e 20 74 68 65 |. happen. on the| 000007f0 20 63 6f 6d 6d 61 6e 64 20 2a 4d 4f 44 45 37 4f | command *MODE7O| 00000800 4e 2f 42 52 45 41 4b 20 49 20 62 72 6f 75 67 68 |N/BREAK I brough| 00000810 74 20 62 6f 74 68 0d 52 4f 4d 27 73 20 6c 69 76 |t both.ROM's liv| 00000820 65 20 69 6e 74 6f 20 74 68 65 20 73 79 73 74 65 |e into the syste| 00000830 6d 1a 20 61 6e 64 20 69 73 73 75 65 64 20 74 68 |m. and issued th| 00000840 65 20 63 6f 6d 6d 61 6e 64 20 2d 20 74 68 65 20 |e command - the | 00000850 63 6f 6d 70 75 74 65 72 20 64 6f 65 73 0d 6e 6f |computer does.no| 00000860 74 20 63 72 61 73 68 20 62 75 74 20 67 6f 65 73 |t crash but goes| 00000870 20 73 74 72 61 69 67 68 74 20 74 6f 1a 20 74 68 | straight to. th| 00000880 65 1a 20 4d 4f 44 45 37 1a 20 77 69 74 68 1a 20 |e. MODE7. with. | 00000890 74 68 65 1a 20 53 69 6d 75 6c 61 74 6f 72 1a 20 |the. Simulator. | 000008a0 52 4f 4d 2e 0d 48 6f 77 65 76 65 72 2c 20 49 20 |ROM..However, I | 000008b0 6e 6f 72 6d 61 6c 6c 79 20 77 6f 75 6c 64 20 68 |normally would h| 000008c0 61 76 65 20 70 61 67 65 20 31 33 20 6b 69 6c 6c |ave page 13 kill| 000008d0 65 64 20 76 69 61 20 43 4c 49 43 4b 20 75 6e 74 |ed via CLICK unt| 000008e0 69 6c 20 49 20 6e 65 65 64 20 61 0d 73 70 65 63 |il I need a.spec| 000008f0 69 66 69 63 20 52 4f 4d 20 69 6e 20 74 68 65 20 |ific ROM in the | 00000900 52 4f 4d 31 32 38 2e 0d 41 63 63 6f 72 64 69 6e |ROM128..Accordin| 00000910 67 20 74 6f 20 74 68 65 20 6d 61 6e 75 61 6c 73 |g to the manuals| 00000920 20 62 6f 74 68 1a 20 52 4f 4d 27 73 1a 20 61 72 | both. ROM's. ar| 00000930 65 1a 20 62 65 74 74 65 72 20 75 73 65 64 20 77 |e. better used w| 00000940 69 74 68 20 74 68 65 20 4d 61 73 74 65 72 0d 52 |ith the Master.R| 00000950 61 6d 20 42 6f 61 72 64 2c 20 61 6e 64 20 62 6f |am Board, and bo| 00000960 74 68 20 52 4f 4d 27 73 20 77 69 6c 6c 20 77 6f |th ROM's will wo| 00000970 72 6b 20 77 69 74 68 1a 20 74 68 65 1a 20 42 42 |rk with. the. BB| 00000980 43 1a 20 52 4f 4d 20 57 6f 72 64 77 69 73 65 2b |C. ROM Wordwise+| 00000990 20 77 6f 72 64 0d 70 72 6f 63 65 73 73 6f 72 2e | word.processor.| 000009a0 0d 57 68 61 74 20 49 20 61 6d 20 65 78 70 65 72 |.What I am exper| 000009b0 69 6d 65 6e 74 69 6e 67 20 77 69 74 68 1a 20 61 |imenting with. a| 000009c0 74 1a 20 70 72 65 73 65 6e 74 20 69 73 20 73 65 |t. present is se| 000009d0 65 69 6e 67 20 77 68 61 74 20 49 20 64 6f 20 77 |eing what I do w| 000009e0 69 74 68 20 74 68 65 0d 54 65 6c 65 74 65 78 74 |ith the.Teletext| 000009f0 20 63 6f 6e 74 72 6f 6c 20 63 6f 64 65 73 2e 20 | control codes. | 00000a00 48 65 72 65 20 6f 6e 65 20 61 6c 73 6f 20 6e 65 |Here one also ne| 00000a10 65 64 73 1a 20 74 68 65 1a 20 42 42 43 1a 20 55 |eds. the. BBC. U| 00000a20 73 65 72 1a 20 47 75 69 64 65 20 66 6f 72 0d 4a |ser. Guide for.J| 00000a30 41 46 41 1a 20 61 73 73 75 6d 65 73 20 61 6e 79 |AFA. assumes any| 00000a40 6f 6e 65 20 75 73 69 6e 67 20 4d 4f 44 45 37 20 |one using MODE7 | 00000a50 6f 6e 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 20 |on the Electron | 00000a60 77 69 6c 6c 20 62 65 20 66 61 6d 69 6c 69 61 72 |will be familiar| 00000a70 20 77 69 74 68 0d 74 68 65 20 42 42 43 1a 20 63 | with.the BBC. c| 00000a80 6f 6d 70 75 74 65 72 21 1a 20 4e 6f 74 20 6e 65 |omputer!. Not ne| 00000a90 63 65 73 73 61 72 69 6c 79 20 73 6f 21 20 49 20 |cessarily so! I | 00000aa0 64 6f 20 66 69 6e 64 20 75 73 69 6e 67 20 74 68 |do find using th| 00000ab0 65 20 63 6f 64 65 73 20 69 73 20 61 0d 62 69 74 |e codes is a.bit| 00000ac0 20 74 65 64 69 6f 75 73 2c 20 62 75 74 20 70 61 | tedious, but pa| 00000ad0 74 69 65 6e 63 65 1a 20 69 73 1a 20 61 1a 20 76 |tience. is. a. v| 00000ae0 69 72 74 75 65 2e 20 4f 6e 65 20 67 6f 6f 64 20 |irtue. One good | 00000af0 74 68 69 6e 67 20 69 73 20 74 68 61 74 20 74 68 |thing is that th| 00000b00 65 72 65 0d 61 72 65 20 74 61 62 6c 65 73 20 69 |ere.are tables i| 00000b10 6e 20 74 68 65 20 62 61 63 6b 20 6f 66 20 74 68 |n the back of th| 00000b20 65 1a 20 55 73 65 72 1a 20 47 75 69 64 65 1a 20 |e. User. Guide. | 00000b30 74 68 61 74 1a 20 67 69 76 65 1a 20 63 6f 64 65 |that. give. code| 00000b40 73 1a 20 66 6f 72 20 74 68 65 0d 54 65 6c 65 74 |s. for the.Telet| 00000b50 65 78 74 1a 20 44 69 73 70 6c 61 79 65 64 1a 20 |ext. Displayed. | 00000b60 47 72 61 70 68 69 63 1a 20 43 68 61 72 61 63 74 |Graphic. Charact| 00000b70 65 72 73 2c 1a 20 61 6e 64 1a 20 74 68 65 20 54 |ers,. and. the T| 00000b80 65 6c 65 74 65 78 74 20 44 69 73 70 6c 61 79 65 |eletext Displaye| 00000b90 64 0d 41 6c 70 68 61 6e 75 6d 65 72 69 63 20 43 |d.Alphanumeric C| 00000ba0 68 61 72 61 63 74 65 72 73 2e 20 48 6f 77 65 76 |haracters. Howev| 00000bb0 65 72 2c 20 63 6f 64 65 73 20 63 61 6e 20 62 65 |er, codes can be| 00000bc0 20 63 61 6c 63 75 6c 61 74 65 64 20 61 73 20 66 | calculated as f| 00000bd0 6f 6c 6c 6f 77 73 3a 2d 0d 20 20 20 20 20 20 20 |ollows:-. | 00000be0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000bf0 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f |________________| 00000c00 20 20 20 20 0d 20 20 20 09 09 09 7c 09 7c 20 09 | . ...|.| .| 00000c10 7c 20 20 20 20 20 20 20 09 0d 09 20 20 20 20 20 || ... | 00000c20 20 20 20 20 20 20 20 28 31 29 09 7c 20 20 31 09 | (1).| 1.| 00000c30 7c 20 20 20 32 20 20 20 7c 20 28 32 29 0d 09 09 || 2 | (2)...| 00000c40 09 7c 5f 5f 5f 5f 5f 5f 5f 7c 5f 5f 5f 5f 5f 5f |.|_______|______| 00000c50 5f 7c 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |_| | 00000c60 20 20 20 20 20 09 0d 09 09 09 7c 09 7c 09 7c 0d | .....|.|.|.| 00000c70 09 20 20 20 20 20 20 20 20 20 20 20 20 28 33 29 |. (3)| 00000c80 09 7c 20 20 20 34 09 7c 20 20 38 09 7c 20 28 34 |.| 4.| 8.| (4| 00000c90 29 0d 09 09 09 7c 5f 5f 5f 5f 5f 5f 5f 7c 5f 5f |)....|_______|__| 00000ca0 5f 5f 5f 5f 5f 7c 0d 09 09 09 7c 09 7c 09 7c 0d |_____|....|.|.|.| 00000cb0 09 20 20 20 20 20 20 20 20 20 20 20 20 28 35 29 |. (5)| 00000cc0 09 7c 20 20 31 36 09 7c 20 20 36 34 09 7c 20 28 |.| 16.| 64.| (| 00000cd0 36 29 0d 09 09 09 7c 5f 5f 5f 5f 5f 5f 5f 7c 5f |6)....|_______|_| 00000ce0 5f 5f 5f 5f 5f 5f 7c 0d 54 68 65 20 67 72 61 70 |______|.The grap| 00000cf0 68 69 63 20 73 68 61 70 65 73 20 61 72 65 20 63 |hic shapes are c| 00000d00 61 6c 63 75 6c 61 74 65 64 20 66 72 6f 6d 20 61 |alculated from a| 00000d10 20 63 6f 6d 62 69 6e 61 74 69 6f 6e 20 6f 66 20 | combination of | 00000d20 61 20 73 65 6c 65 63 74 69 6f 6e 20 6f 66 0d 73 |a selection of.s| 00000d30 71 75 61 72 65 73 20 66 72 6f 6d 20 61 20 32 20 |quares from a 2 | 00000d40 62 79 20 33 20 67 72 69 64 20 61 6e 64 20 65 61 |by 3 grid and ea| 00000d50 63 68 20 73 71 75 61 72 65 20 68 61 73 20 61 20 |ch square has a | 00000d60 76 61 6c 75 65 20 61 73 20 73 68 6f 77 6e 20 61 |value as shown a| 00000d70 62 6f 76 65 2e 0d 49 20 68 61 76 65 20 6e 75 6d |bove..I have num| 00000d80 62 65 72 65 64 20 74 68 65 20 73 71 75 61 72 65 |bered the square| 00000d90 73 20 66 72 6f 6d 20 28 31 29 20 74 6f 20 28 36 |s from (1) to (6| 00000da0 29 20 66 6f 72 20 65 61 73 65 20 6f 66 20 64 65 |) for ease of de| 00000db0 73 63 72 69 70 74 69 6f 6e 2e 0d 53 61 79 20 74 |scription..Say t| 00000dc0 68 61 74 20 6f 6e 65 20 77 61 6e 74 65 64 20 61 |hat one wanted a| 00000dd0 1a 20 73 68 61 70 65 1a 20 6d 61 64 65 1a 20 75 |. shape. made. u| 00000de0 70 20 6f 66 20 73 71 75 61 72 65 73 20 28 32 29 |p of squares (2)| 00000df0 2c 28 34 29 20 61 6e 64 20 28 35 29 2e 20 54 68 |,(4) and (5). Th| 00000e00 65 0d 63 6f 64 65 20 73 68 6f 77 6e 20 69 6e 20 |e.code shown in | 00000e10 74 68 65 20 74 61 62 6c 65 20 66 6f 72 20 74 68 |the table for th| 00000e20 69 73 20 69 73 20 31 38 36 2e 20 49 74 20 69 73 |is is 186. It is| 00000e30 20 63 61 6c 63 75 6c 61 74 65 64 20 62 79 20 61 | calculated by a| 00000e40 64 64 69 6e 67 20 75 70 0d 74 68 65 20 76 61 6c |dding up.the val| 00000e50 75 65 20 6f 66 20 74 68 65 20 73 71 75 61 72 65 |ue of the square| 00000e60 73 20 73 65 6c 65 63 74 65 64 20 61 6e 64 20 74 |s selected and t| 00000e70 68 65 6e 20 61 64 64 69 6e 67 20 33 32 20 61 6e |hen adding 32 an| 00000e80 64 20 31 32 38 2c 20 74 68 75 73 0d 09 09 09 32 |d 128, thus....2| 00000e90 2b 38 2b 31 36 2b 33 32 2b 31 32 38 20 3d 20 31 |+8+16+32+128 = 1| 00000ea0 38 36 0d 48 61 76 69 6e 67 20 73 65 6c 65 63 74 |86.Having select| 00000eb0 65 64 20 74 68 69 73 20 73 68 61 70 65 20 77 65 |ed this shape we| 00000ec0 1a 20 63 61 6e 20 70 72 69 6e 74 20 69 74 20 6f |. can print it o| 00000ed0 75 74 20 61 6e 79 77 68 65 72 65 20 6f 6e 20 74 |ut anywhere on t| 00000ee0 68 65 20 73 63 72 65 65 6e 0d 61 6e 64 20 69 6e |he screen.and in| 00000ef0 20 61 20 73 65 6c 65 63 74 65 64 20 63 6f 6c 6f | a selected colo| 00000f00 75 72 2c 20 73 61 79 2c 1a 20 72 65 64 2e 1a 20 |ur, say,. red.. | 00000f10 54 68 65 1a 20 63 6f 64 65 20 66 6f 72 20 72 65 |The. code for re| 00000f20 64 20 69 6e 20 67 72 61 70 68 69 63 73 20 69 73 |d in graphics is| 00000f30 0d 31 34 35 2e 20 54 68 75 73 2c 0d 09 09 50 52 |.145. Thus,...PR| 00000f40 49 4e 54 20 54 41 42 28 58 2c 59 29 3b 43 48 52 |INT TAB(X,Y);CHR| 00000f50 24 28 31 34 35 29 3b 43 48 52 24 28 31 35 34 29 |$(145);CHR$(154)| 00000f60 3b 43 48 52 24 28 31 38 36 29 20 20 20 0d 77 69 |;CHR$(186) .wi| 00000f70 6c 6c 1a 20 64 6f 20 74 68 65 20 74 72 69 63 6b |ll. do the trick| 00000f80 2e 20 43 6f 64 65 20 31 35 34 20 69 73 20 6e 65 |. Code 154 is ne| 00000f90 63 65 73 73 61 72 79 20 66 6f 72 20 73 65 70 61 |cessary for sepa| 00000fa0 72 61 74 65 64 20 20 67 72 61 70 68 69 63 73 2e |rated graphics.| 00000fb0 20 54 68 65 0d 62 61 63 6b 67 72 6f 75 6e 64 20 | The.background | 00000fc0 63 6f 6c 6f 75 72 20 63 61 6e 1a 20 61 6c 73 6f |colour can. also| 00000fd0 1a 20 62 65 1a 20 63 68 61 6e 67 65 64 1a 20 62 |. be. changed. b| 00000fe0 79 20 61 20 73 6c 69 67 68 74 6c 79 20 6d 6f 72 |y a slightly mor| 00000ff0 65 20 65 6c 61 62 6f 72 61 74 65 0d 70 72 6f 63 |e elaborate.proc| 00001000 65 64 75 72 65 2e 20 59 6f 75 20 63 61 6e 20 62 |edure. You can b| 00001010 65 67 69 6e 20 74 6f 20 73 65 65 20 68 6f 77 1a |egin to see how.| 00001020 20 74 68 65 1a 20 70 72 6f 67 72 61 6d 6d 69 6e | the. programmin| 00001030 67 20 62 65 63 6f 6d 65 73 20 61 20 6c 69 74 74 |g becomes a litt| 00001040 6c 65 0d 74 65 64 69 6f 75 73 21 20 49 74 20 69 |le.tedious! It i| 00001050 73 20 65 61 73 69 65 72 2c 20 49 20 74 68 69 6e |s easier, I thin| 00001060 6b 2c 20 74 6f 20 75 73 65 20 74 68 65 1a 20 56 |k, to use the. V| 00001070 44 55 20 66 6f 72 6d 61 74 2c 20 74 68 75 73 20 |DU format, thus | 00001080 74 77 6f 20 6c 69 6e 65 73 0d 6f 66 20 70 72 6f |two lines.of pro| 00001090 67 72 61 6d 6d 65 3a 2d 0d 20 20 20 20 20 20 20 |gramme:-. | 000010a0 20 20 20 20 20 20 20 20 50 52 49 4e 54 20 54 41 | PRINT TA| 000010b0 42 28 58 2c 59 29 3b 20 20 20 20 20 20 20 20 20 |B(X,Y); | 000010c0 20 20 20 20 20 20 20 20 0d 20 20 20 20 20 20 20 | . | 000010d0 20 20 20 20 20 20 20 20 56 44 55 20 31 34 35 2c | VDU 145,| 000010e0 31 35 34 2c 31 38 36 20 2c 20 77 69 6c 6c 20 70 |154,186 , will p| 000010f0 72 69 6e 74 20 74 68 65 20 72 65 64 20 73 68 61 |rint the red sha| 00001100 70 65 20 61 74 20 58 2c 59 2e 0d 54 68 65 20 4d |pe at X,Y..The M| 00001110 4f 44 45 37 20 73 63 72 65 65 6e 20 69 73 20 58 |ODE7 screen is X| 00001120 2c 20 30 20 74 6f 20 33 39 2c 20 61 6e 64 20 59 |, 0 to 39, and Y| 00001130 2c 1a 20 30 1a 20 74 6f 1a 20 32 34 2e 20 30 2c |,. 0. to. 24. 0,| 00001140 30 20 69 73 20 74 68 65 20 74 6f 70 20 6c 65 66 |0 is the top lef| 00001150 74 0d 68 61 6e 64 20 63 6f 72 6e 65 72 2e 0d 49 |t.hand corner..I| 00001160 74 20 66 6f 6c 6c 6f 77 73 20 74 68 61 74 20 74 |t follows that t| 00001170 68 65 20 68 69 67 68 65 73 74 20 63 6f 64 65 20 |he highest code | 00001180 69 73 20 66 6f 72 20 77 68 6f 6c 65 20 62 6c 6f |is for whole blo| 00001190 63 6b 20 61 74 20 32 35 35 2c 20 74 68 75 73 0d |ck at 255, thus.| 000011a0 09 09 09 31 2b 32 2b 34 2b 38 2b 31 36 2b 36 34 |...1+2+4+8+16+64| 000011b0 2b 33 32 2b 31 32 38 20 3d 20 32 35 35 20 2c 20 |+32+128 = 255 , | 000011c0 61 6e 64 20 74 68 65 20 6c 6f 77 65 73 74 0d 31 |and the lowest.1| 000011d0 36 31 20 66 6f 72 20 6a 75 73 74 20 73 71 75 61 |61 for just squa| 000011e0 72 65 20 28 31 29 2e 20 43 6f 64 65 1a 20 31 36 |re (1). Code. 16| 000011f0 30 1a 20 69 73 1a 20 6e 6f 1a 20 73 71 75 61 72 |0. is. no. squar| 00001200 65 20 73 65 6c 65 63 74 69 6f 6e 20 61 74 20 61 |e selection at a| 00001210 74 20 61 6c 6c 0d 74 68 6f 75 67 68 20 69 74 20 |t all.though it | 00001220 63 6f 75 6c 64 20 62 65 20 70 72 69 6e 74 65 64 |could be printed| 00001230 20 62 79 20 73 75 69 74 61 62 6c 65 20 63 6f 6c | by suitable col| 00001240 6f 75 72 20 73 65 6c 65 63 74 69 6f 6e 2e 0d 41 |our selection..A| 00001250 20 6c 6f 74 20 6f 66 20 74 68 65 20 63 6f 64 65 | lot of the code| 00001260 73 20 62 65 6c 6f 77 20 31 36 30 20 64 6f 20 6e |s below 160 do n| 00001270 6f 74 68 69 6e 67 20 61 74 20 61 6c 6c 2c 20 62 |othing at all, b| 00001280 75 74 20 6f 74 68 65 72 73 20 6f 70 65 72 61 74 |ut others operat| 00001290 65 20 74 68 65 0d 70 72 69 6e 74 65 72 2c 20 70 |e the.printer, p| 000012a0 72 6f 64 75 63 65 20 64 6f 75 62 6c 65 20 68 65 |roduce double he| 000012b0 69 67 68 74 20 6c 65 74 74 65 72 73 2c 1a 20 70 |ight letters,. p| 000012c0 72 6f 64 75 63 65 1a 20 63 6f 6c 6f 75 72 73 1a |roduce. colours.| 000012d0 20 28 73 74 65 61 64 79 1a 20 6f 72 0d 66 6c 61 | (steady. or.fla| 000012e0 73 68 69 6e 67 29 2c 1a 20 70 72 6f 64 75 63 65 |shing),. produce| 000012f0 20 62 65 65 70 73 2c 20 6d 6f 76 65 20 74 68 65 | beeps, move the| 00001300 20 63 75 72 73 6f 72 20 61 72 6f 75 6e 64 20 28 | cursor around (| 00001310 75 73 65 66 75 6c 20 69 6e 20 6d 61 6b 69 6e 67 |useful in making| 00001320 20 75 70 0d 70 69 63 74 75 72 65 73 20 75 73 69 | up.pictures usi| 00001330 6e 67 20 74 68 65 20 63 6f 64 65 64 20 73 68 61 |ng the coded sha| 00001340 70 65 73 29 20 61 6e 64 20 6f 74 68 65 72 20 66 |pes) and other f| 00001350 75 6e 63 74 69 6f 6e 73 2e 20 53 6f 20 6f 6e 65 |unctions. So one| 00001360 20 63 61 6e 20 62 65 67 69 6e 0d 74 6f 20 73 65 | can begin.to se| 00001370 65 1a 20 74 68 61 74 20 70 69 63 74 75 72 65 73 |e. that pictures| 00001380 20 6c 69 6b 65 20 49 54 56 27 73 20 42 61 6d 62 | like ITV's Bamb| 00001390 65 72 20 42 6f 6f 7a 6c 65 72 20 63 61 6e 20 65 |er Boozler can e| 000013a0 61 73 69 6c 79 20 62 65 20 70 72 6f 64 75 63 65 |asily be produce| 000013b0 64 0d 2d 20 65 76 65 6e 20 69 66 2c 20 61 73 20 |d.- even if, as | 000013c0 49 20 68 61 76 65 20 73 61 69 64 2c 20 74 68 65 |I have said, the| 000013d0 20 70 72 6f 67 72 61 6d 6d 69 6e 67 20 69 73 20 | programming is | 000013e0 61 20 62 69 74 20 74 65 64 69 6f 75 73 20 2d 20 |a bit tedious - | 000013f0 61 74 20 6c 65 61 73 74 0d 66 69 72 73 74 20 74 |at least.first t| 00001400 69 6d 65 20 72 6f 75 6e 64 2e 20 49 20 63 61 6e |ime round. I can| 00001410 20 73 65 65 20 74 68 61 74 20 77 69 74 68 20 74 | see that with t| 00001420 69 6d 65 20 6f 6e 65 20 63 6f 75 6c 64 20 62 75 |ime one could bu| 00001430 69 6c 64 20 75 70 20 61 20 73 65 72 69 65 73 0d |ild up a series.| 00001440 6f 66 20 63 6f 6e 6e 65 63 74 65 64 20 73 68 61 |of connected sha| 00001450 70 65 73 20 74 6f 20 75 73 65 20 74 6f 1a 20 6d |pes to use to. m| 00001460 61 6b 65 1a 20 70 69 63 74 75 72 65 73 20 61 6e |ake. pictures an| 00001470 64 20 6b 65 65 70 20 74 68 65 6d 20 6f 6e 20 64 |d keep them on d| 00001480 69 73 6b 20 74 6f 0d 62 72 69 6e 67 20 69 6e 74 |isk to.bring int| 00001490 6f 20 70 72 6f 67 72 61 6d 6d 65 73 20 61 73 20 |o programmes as | 000014a0 61 6e 64 20 77 68 65 6e 20 72 65 71 75 69 72 65 |and when require| 000014b0 64 2e 20 20 20 20 20 20 20 20 20 20 20 20 20 0d |d. .| 000014c0 49 74 1a 20 69 73 1a 20 69 6e 74 65 72 65 73 74 |It. is. interest| 000014d0 69 6e 67 1a 20 74 6f 1a 20 6e 6f 74 65 20 74 68 |ing. to. note th| 000014e0 61 74 20 63 6f 6c 6f 75 72 20 73 65 6c 65 63 74 |at colour select| 000014f0 69 6f 6e 20 72 65 71 75 69 72 65 73 20 64 69 66 |ion requires dif| 00001500 66 65 72 69 6e 67 0d 63 6f 64 65 73 20 66 6f 72 |fering.codes for| 00001510 20 74 68 65 20 73 61 6d 65 20 63 6f 6c 6f 75 72 | the same colour| 00001520 1a 20 64 65 70 65 6e 64 69 6e 67 1a 20 77 68 65 |. depending. whe| 00001530 74 68 65 72 20 61 6c 70 68 61 6e 75 6d 65 72 69 |ther alphanumeri| 00001540 63 20 6f 72 20 67 72 61 70 68 69 63 73 0d 69 73 |c or graphics.is| 00001550 20 6f 70 65 72 61 62 6c 65 2e 0d 41 6e 6f 74 68 | operable..Anoth| 00001560 65 72 20 70 6f 69 6e 74 20 69 73 20 74 68 61 74 |er point is that| 00001570 20 74 68 65 72 65 20 61 72 65 20 6e 6f 1a 20 4d | there are no. 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Toggl| 00001650 65 73 20 62 65 74 77 65 65 6e 20 74 68 65 20 74 |es between the t| 00001660 77 6f 2e 0d 09 33 29 20 45 46 4e 20 49 6e 74 65 |wo...3) EFN Inte| 00001670 72 70 72 65 74 20 66 75 6e 63 74 69 6f 6e 20 6b |rpret function k| 00001680 65 79 73 20 61 73 20 45 6c 65 63 74 72 6f 6e 20 |eys as Electron | 00001690 66 75 6e 63 74 69 6f 6e 20 6b 65 79 73 2e 0d 09 |function keys...| 000016a0 34 29 20 42 46 4e 20 49 6e 74 65 72 70 72 65 74 |4) BFN Interpret| 000016b0 20 66 75 6e 63 74 69 6f 6e 20 6b 65 79 73 20 61 | function keys a| 000016c0 73 20 42 42 43 20 6d 69 63 72 6f 20 53 48 49 46 |s BBC micro SHIF| 000016d0 54 2f 43 54 52 4c 20 66 75 6e 63 74 69 6f 6e 0d |T/CTRL function.| 000016e0 6b 65 79 73 2e 20 54 68 69 73 20 69 73 20 74 68 |keys. This is th| 000016f0 65 20 64 65 66 61 75 6c 74 20 77 68 65 6e 20 74 |e default when t| 00001700 68 65 20 52 4f 4d 27 73 20 61 72 65 20 61 63 74 |he ROM's are act| 00001710 69 76 65 2e 0d 09 35 29 20 4d 43 4f 4d 4d 1a 20 |ive...5) MCOMM. | 00001720 49 66 1a 20 6f 6e 65 20 68 61 73 20 74 68 65 20 |If. one has the | 00001730 72 65 71 75 69 72 65 64 20 61 64 64 69 74 69 6f |required additio| 00001740 6e 61 6c 20 65 71 75 69 70 6d 65 6e 74 20 50 72 |nal equipment Pr| 00001750 65 73 74 65 6c 0d 63 61 6e 20 62 65 20 64 69 61 |estel.can be dia| 00001760 6c 6c 65 64 20 75 70 2e 0d 09 36 29 20 54 45 4c |lled up...6) TEL| 00001770 45 54 45 58 54 1a 20 41 67 61 69 6e 20 69 66 1a |ETEXT. Again if.| 00001780 20 74 68 65 1a 20 72 65 71 75 69 72 65 64 1a 20 | the. required. | 00001790 65 71 75 69 70 6d 65 6e 74 1a 20 69 73 1a 20 61 |equipment. is. a| 000017a0 76 61 69 6c 61 62 6c 65 0d 54 45 4c 45 54 45 58 |vailable.TELETEX| 000017b0 54 20 63 61 6e 20 62 65 20 72 65 63 65 69 76 65 |T can be receive| 000017c0 64 2e 20 28 49 1a 20 68 61 76 65 1a 20 74 68 65 |d. (I. have. the| 000017d0 20 65 71 75 69 70 6d 65 6e 74 20 66 6f 72 20 74 | equipment for t| 000017e0 68 69 73 20 66 6f 72 20 74 68 65 20 42 42 43 0d |his for the BBC.| 000017f0 4d 69 63 72 6f 29 2e 0d 54 68 65 20 66 6f 6c 6c |Micro)..The foll| 00001800 6f 77 69 6e 67 20 63 6f 6d 6d 61 6e 64 73 20 61 |owing commands a| 00001810 72 65 20 61 70 70 72 6f 70 72 69 61 74 65 20 74 |re appropriate t| 00001820 6f 20 74 68 65 20 53 69 6d 75 6c 61 74 6f 72 20 |o the Simulator | 00001830 52 4f 4d 20 6f 6e 6c 79 3a 2d 0d 09 31 29 20 4d |ROM only:-..1) M| 00001840 52 41 50 20 53 65 6c 65 63 74 20 72 61 70 69 64 |RAP Select rapid| 00001850 20 75 70 64 61 74 69 6e 67 20 6d 6f 64 65 2e 1a | updating mode..| 00001860 20 54 68 65 1a 20 64 65 66 61 75 6c 74 20 77 69 | The. default wi| 00001870 74 68 20 57 4f 52 44 57 49 53 45 0d 6f 72 20 74 |th WORDWISE.or t| 00001880 68 65 20 4d 61 73 74 65 72 20 52 61 6d 20 42 6f |he Master Ram Bo| 00001890 61 72 64 20 61 63 74 69 76 65 2e 0d 09 32 29 20 |ard active...2) | 000018a0 4d 4e 4f 52 4d 20 53 65 6c 65 63 74 20 6e 6f 72 |MNORM Select nor| 000018b0 6d 61 6c 20 75 70 64 61 74 69 6e 67 20 6d 6f 64 |mal updating mod| 000018c0 65 2e 20 54 68 65 20 64 65 66 61 75 6c 74 20 77 |e. The default w| 000018d0 68 65 6e 20 6e 65 69 74 68 65 72 20 0d 57 4f 52 |hen neither .WOR| 000018e0 44 57 49 53 45 20 6f 72 20 74 68 65 20 4d 61 73 |DWISE or the Mas| 000018f0 74 65 72 20 52 61 6d 20 42 6f 61 72 64 20 61 72 |ter Ram Board ar| 00001900 65 20 61 63 74 69 76 65 2e 0d 54 68 65 20 66 6f |e active..The fo| 00001910 6c 6c 6f 77 69 6e 67 20 63 6f 6d 6d 61 6e 64 73 |llowing commands| 00001920 20 61 72 65 20 61 70 70 72 6f 70 72 69 61 74 65 | are appropriate| 00001930 74 6f 20 74 68 65 20 4d 6b 2e 32 20 52 4f 4d 20 |to the Mk.2 ROM | 00001940 6f 6e 6c 79 3a 2d 0d 09 31 29 20 47 52 45 45 4e |only:-..1) GREEN| 00001950 20 53 65 6c 65 63 74 20 67 72 65 65 6e 20 73 63 | Select green sc| 00001960 72 65 65 6e 20 6d 6f 6e 69 74 6f 72 20 6d 6f 64 |reen monitor mod| 00001970 65 2e 0d 09 32 29 20 4d 45 44 20 54 68 69 73 20 |e...2) MED This | 00001980 69 73 20 64 65 6d 6f 6e 73 74 72 61 74 69 6f 6e |is demonstration| 00001990 20 73 63 72 65 65 6e 20 65 64 69 74 6f 72 20 61 | screen editor a| 000019a0 6e 64 1a 20 65 64 69 74 65 64 1a 20 73 63 72 65 |nd. edited. scre| 000019b0 65 6e 73 0d 63 61 6e 20 62 65 20 53 41 56 45 65 |ens.can be SAVEe| 000019c0 64 20 69 66 20 72 65 71 75 69 72 65 64 2e 0d 41 |d if required..A| 000019d0 64 64 69 74 69 6f 6e 61 6c 6c 79 2c 20 77 68 65 |dditionally, whe| 000019e0 6e 20 62 6f 74 68 20 52 4f 4d 27 73 20 61 72 65 |n both ROM's are| 000019f0 20 61 63 74 69 76 65 20 74 68 65 79 20 72 65 73 | active they res| 00001a00 70 6f 6e 64 20 74 6f 3a 2d 0d 09 31 29 20 2a 48 |pond to:-..1) *H| 00001a10 45 4c 50 1a 20 42 41 52 53 1a 20 47 69 76 65 73 |ELP. BARS. Gives| 00001a20 20 63 6f 6c 6f 75 72 20 62 61 72 73 20 6f 6e 20 | colour bars on | 00001a30 74 68 65 20 6d 6f 6e 69 74 6f 72 20 74 6f 20 66 |the monitor to f| 00001a40 61 63 69 6c 69 74 61 74 65 0d 63 6f 6c 6f 75 72 |acilitate.colour| 00001a50 20 61 64 6a 75 73 74 6d 65 6e 74 20 61 6e 64 20 | adjustment and | 00001a60 63 6f 6e 74 72 61 73 74 2e 0d 09 32 29 20 2a 54 |contrast...2) *T| 00001a70 56 6e 20 49 66 20 6e 3d 31 1a 20 64 69 73 70 6c |Vn If n=1. displ| 00001a80 61 79 1a 20 69 73 20 6d 6f 76 65 64 20 75 70 2e |ay. is moved up.| 00001a90 20 49 66 20 6e 3d 32 35 34 20 64 69 73 70 6c 61 | If n=254 displa| 00001aa0 79 20 69 73 20 6d 6f 76 65 64 0d 64 6f 77 6e 2e |y is moved.down.| 00001ab0 20 42 75 74 20 75 6e 6c 69 6b 65 20 74 68 65 20 | But unlike the | 00001ac0 42 42 43 20 6c 69 6e 65 73 20 61 72 65 20 6c 6f |BBC lines are lo| 00001ad0 73 74 20 77 69 74 68 20 74 68 65 20 45 6c 65 63 |st with the Elec| 00001ae0 74 72 6f 6e 2e 0d 48 65 72 65 20 65 6e 64 65 74 |tron..Here endet| 00001af0 68 20 74 68 65 20 6c 65 73 73 6f 6e 20 62 79 20 |h the lesson by | 00001b00 74 68 65 20 45 6c 64 65 72 28 6c 79 29 20 4e 6f |the Elder(ly) No| 00001b10 76 69 63 65 21 0d 0d |vice!..| 00001b17
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.