I'd like to say how much I like your magazine, but my handwriting gets shaky when I giggle. Anyway, I'd best put this picture down and while I'm at it, have I got time to tell you about the Manchester Longsight Sinclair Users Club, which meets in Longsight Library on Wednesdays? ... No?, Ah, well.
Whalley Range, Manchester
|f o r u m|
Write to us - there's a bundle of free Spectrum software for this month's Star Letter! Write to Forum, Your Spectrum, 14 Rathbone Place, London W1P 1DE.
1110 DATA 127, 62, 4, 205, 20, 127, 14, 0, 62
1120 DATA 27, 205, 20, 127, 62, 75, 205, 20, 127
You'll also have to change the checksum. This will give a dense print of 11 cm by 18 cm. A more impressive print 20 cm by 27 cm can be made with:
1110 DATA 127, 62, 6, 205, 20, 127, 14, 0, 62
1120 DATA 27, 205, 20, 127, 62, 75, 205, 20, 127
Unfortunately, you will lose a narrow strip across the top of the screen with this routine.
TIME FOR BEDI really enjoy your machine code programs but they wear me out. I just don't have the time or the stamina to sit down and type in the whole program in one go. Press Caps Shift and 6 together to break into the Hex loader; type SAVE "file name" CODE <start address>, <length of code>; then, when you come back to your program, load back in the Hex loader and type CLEAR <clear address> (usually found in a line at the beginning
Thanks for the formula, Martin. It will work on most of the Hex loaders that we publish. Now I think I'll get some shut-eye - all that talk of sleep has worn me out. Troubleshootin 'Pete.
|I'd like to say how much I like your photo, but my handwriting gets shaky when I roll around the floor laughing. Still, we have one thing in common - I like being PSSST as well. Ed.|
ADDRESS 8000 8003 8006 8007 8008 8009 800B 800C 800E 800F 8011 8012 8013 8014 8016 8017 8019 801B 801C 801D 801F 8021 8023 8025 8027 8029 802A 802B 802D 802E 802F 8030 8032 8033 8034 8035 8036 8038 8039 803A 803D 803E 803F 8040 8041 8042 8043 8045 8046 8048 8049 804A 804B 804D 804E 804F
HEXCODE 210040 110058 00 00 00 0603 C5 0E08 E5 0608 E5 D5 C5 0E04 7E 0608 CB17 F5 1A 3806 CB1F CB1F CB1F E607 C690 D7 F1 10EC 23 13 0D 20E4 C1 D1 E1 24 10D9 E1 C5 012000 09 EB 09 EB C1 0D 20C9 A7 3E07 84 67 C1 10BE 00 00 C9
MNEMONICS LD HL,4000 LD DE,5800 NOP NOP NOP LD B,03 PUSH BC LD C,08 PUSH HL LD B,08 PUSH HL PUSH DE PUSH BC LD C,04 LD A,(HL) LD B,08 RL A PUSH AF LD A,(DE) JR C,8025 RR A RR A RR A AND 07 ADD A,90 RST 10 POP AF DJNZ 8019 INC HL INC DE DEC C JR NZ,8016 POP BC POP DE POP HL INC H DJNZ 8011 POP HL PUSH BC LD BC,0020 ADD HL,BC EX DE,HL ADD HL,BC EX DE,HL POP BC DEC C JR NZ,800E AND A LD A,07 ADD A,H LD H,A POP BC DJNZ 800B NOP NOP RET
10 PRINT AT 10,0;"HUGE SCREEN$ FANCY PRINTER COPY" 20 PRINT ''"HAVE PRINTER READY LOAD SCREEN$" 30 LOAD "" CODE 16384 40 FOR n=0 TO 28 STEP 4 50 POKE 32769,n: POKE 32772,n 60 LPRINT : LPRINT : LPRINT : LPRINT : LPRINT : RANDOMIZE USR 32768 65 IF n=28 THEN GO TO 90 70 FOR t=60 TO -20 STEP -2 80 BEEP .1,t: PAUSE 50: NEXT t 90 LPRINT : LPRINT : LPRINT : LPRINT : LPRINT 100 NEXT n 110 BEEP .1,30: PAUSE 2: GO TO 110 999 STOP 1000 LOAD "" CODE 1100 LOAD "" CODE 1200 RUN 9997 SAVE "HUGESCREEN$ " LINE 10 00 9998 SAVE "U.D.G.s" CODE USR "A", 64 9999 SAVE "McCODE" CODE 32768,120
|This is the Basic part of the program which lets the poor overworked Speccy cool down after each strip-printing stint.|
|USR "h"+7: READ u: POKE a,u ... etc. Anyway, I'm sure I needn't go into that, 'cause you're probably sick to death of hearing about UDG generators.||Get hold of an Assembler, Monitor or plain old Hex loader and type in this code. This needs to be organised from 8000 Hex, so make sure you CLEAR the space in memory for it.|
Originally, I had hoped to
modify the listing given for the
Epson MX, but I found this
too difficult. If anyone has
been successful though, I'd be
very pleased to hear from
A N Key,
Isle of Wight
So would we. This has to be the most popular dump, since Slough acquired a trading estate. Ed
LOWERING THE TONEIf any fellow readers are writing programs using both INPUT and INKEY$ then the following technique may be of interest. After using INPUT leave the Spectrum with Caps Lock set and subsequent INKEY$ may return upper or lower case letters. The usual answer is to laboriously check for the upper and lower case of each letter used.
A neater and more convenient alternative is to include the
between INPUT and
INKEY$, which cancels Caps
Lock if it is set, and then only
lower case need be checked
10 LET X=PEEK 23658: LET A=X: FOR N=7 TO 4 STEP -1: LET A=A-2^N * INT(A/2^N): NEXT N: IF A>=8 THEN LET X=X-8: POKE 23658,X
It works by setting bit 3 of the system variable 23658 (FLAGS2) to 0. This acts as a toggle for Caps Lock. If you wish to modify the line to set Caps Lock instead, this requires only two slight changes.
Well done Mr Sonander, but what about turning Caps Lock on with POKE 23658,8 and then just checking for capital inputs? Troubleshootin' Pete.
Thank you for printing the
excellent Macman in the
March issue. The only thing it
needed to make it perfect was
a joystick option. So, for the
first time, I tried my hand at
hacking and came up with the
following, (without the use of
a disassembler, I might add!)
for use with the Kempston
POKE 29274,0: POKE 29276,31:
POKE 29278,79: POKE 29279,194:
POKE 29283,0: POKE 29285,31:
I admit this is not the most elegant way to use the Kempston port but it is consistent with the keyboard version and so does not affect timing. Also, it doesn't change the reference to the now disabled keyboard control in the instructions.
D W Arthur
Turning the tables on us, eh? The hackers hacked Ed.
MEGABOARDI am half interested in buying YS Megabasic, and half interested in buying a Spectrum+ keyboard.
Is it possible for you to bundle the two together, with new keys QL-style - i.e. without multiple printing to confuse the keys? I'd buy one.
What do you mean, you're half interested in buying Megabasic? How can anyone still be dithering? This is the program of the year, and next year for that matter. However, we don't have any plans to bundle software and hardware yet (give us time!). If you really want a keyboard without the confusing legends, then you should take a look at the Saga 2+ or Saga 3 keyboards, both of which come with the option of having only the standard alphanumeric keys. Ed.
YS Megabasic, you turned
up bugs which I had
unfortunately missed during
the production of the
program. All I can say is that
it's such a big program it was
inevitable that some things
would slip through. |
However, I have come up with a bit of code which will fix the few bugs that have come to light. Top of the flops is the MONitor bug. First of all, to get this code into MegaBasic, load up your master copy in the normal way and then type in the given listing to the MegaBasic system. Save the MegaBasic program you've just typed in, and then RUN it. If the Spectrum NEWs itself, then all has gone well; if you get an error report - check your typing!
To save the new version of
MegaBasic, type SAVE "MB"
CODE 44996,20373; or if
you prefer to save onto
Microdrive, type SAVE
44996,20373. When you want
to load it all back in again,
type CLEAR 44999: LOAD "" CODE, or from Microdrive
type CLEAR 44999: LOAD *"M";1;"MB" CODE. Once
loaded, Megabasic will
automatically execute itself.
That should stop anyone
executing me! |
Cheers Mike. If you find any more probs with YS Megabasic you can drop Mike a line at Your Spectrum, 14 Rathbone Place, London W1P 1DE, and he'll sort it out. That or we'll send the boys round to sort him out. Ed.
1000 LET c=0 1010 FOR a=47110 TO 47367 1020 READ b: POKE a,b 1030 LET c=c+b 1040 NEXT a 1050 IF c<>27311 THEN PRINT "checksum error": ST OP 1055 POKE 53361,195: DOKE_53362,47352 1060 RANDOMIZE USR 47110 1070 DATA 62,229,50,80,222,62,255,50,115,206,1,19 5,175,205,183,30,33,36,219,34,196,175,33,50,184,9 4,35,86,35,123 1080 DATA 178,202,183,17,1,3,0,237,176,24,240,195 ,6,184,37,219,195,67,184,125,219,195,90,184,78,21 0,195,227,184,0,0,58,20,255,167,202 1090 DATA 20,5,33,84,184,229,237,115,61,92,207,49 ,33,0,220,195,40,219,33,200,174,34,54,92,205,110, 13,175,211,254,62,6,50,72,92,50,143 1100 DATA 92,50,141,92,205,175,13,62,2,205,1,22,1 7,173,184,175,205,10,12,58,8,92,254,46,40,3,195,1 73,207,6,69,33,112,23,126,35,50,143 1110 DATA 92,229,197,175,17,164,184,205,10,12,193 ,225,16,238,195,173,207,128,4,32,76,65,82,65,32,1 32,128,22,0,0,4,89,83,32,77,69,71,65 1120 DATA 66,65,83,73,67,13,13,3,86,101,114,115,1 05,111,110,32,49,46,49,13,13,2,127,32,77,105,107, 101,32,76,101,97,109,97,110,32,49,57 1130 DATA 56,53,13,141,254,255,40,7,190,194,85,21 0,195,81,210,58 1140 DATA 52,233,167,202,179,181,193,175,201 1150 DATA 237,91,218,251,19,19,19,19,19,19,19,19, 19,195,117,208
|THE YOUR SPECTRUM TRAINSPOTTER AWARD|
We all make mistakes. (Yes,
incredible as it may seem,
even me - Ed.). Now all
those of you who take great
delight in pointing out all
our minor misdemeanours
will have the chance to
achieve our highest accolade
- The YS Trainspotters'
Award. These certificates
won't be given out lightly -
you're going to have to
reach previously unplumbed
heights of pedantry in the
reading of YS to get one.
Signed with the ceremonial
biro by the Ed himself, this
is not a chance to be missed.
So, get trainspotting those
mistakes - there ain't that
many of 'em! (Tee hee. -
Our first award winner has trainspotted himself to stardom by pointing out our faux-pas in the Ghostbusters article in issue 12.
Well Terry, I can call you Terry, can't I? you have become the first recipient of our coveted Trainspotters' Award. I do so hate a clever dick. Any more takers out there? Ed.
|This program kills all known Megabasic bugs dead!||NOTE: The version of the Ghostbusters article on this site has a correct Spectrum screen shot.|