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<1…14151617181920…34>
  • Are line numbers considered the first statement in the line?I'm trying to understand how BASIC variables are stored in memory using the BASIC Programming manual and am puzzled by the results of the control var…

    ... when storing a FOR ... NEXT loop. The last byte is the ... locations for the FOR NEXT loop control variable this number is ...
    LevelUp LevelUp July 2020 BASIC
  • IM2 on a 128k SpectrumHello: I have found another article on IM2 found in Personal Computer News, Issue 90. In the article "Face up to the Time", I typed up the code (…

    ... mode, even with an endless loop, I get odd results. On ...
    andydansby andydansby August 2020 Development
  • How to write a simple C+asm horizontal scrolling game (Tutorial, z88dk)[b]How to write a simple C/asm horizontal scrolling game[/b] [b]Note:[/b] This tutorial has multiple parts... I am still writing but this first pa…

    ... function has a "while (1)" loop, which means the game will ... loop forever this part (and will ...
    Timmy Timmy September 2020 Development
  • Games with proper "Micro Manuals"COMBINED CASSETTE INLAY AND "MICRO" SIZED INSTRUCTION MANUAL This is something I have not come across before . Two staples are used to hold it al…

    ... the "micro booklet" to the outer cassette inlay .I think this ...
    harriusherbartio harriusherbartio October 2020 Games
  • Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…

    ...
    ld b, 8
    loop: ld a, (de)
    ld ...
    inc e
    djnz loop

    ld de, gfx0 ...
    FrankT FrankT December 2020 Assembler
  • z88dk SP1 Background animations the right wayThere are a few ways to animate background tiles. The most common is to just print the characters with PrintAtInv in the same position to achieve it,…

    ... outside the main loop and inside the main loop change it's ... only once, outside the main loop, and then just update the ...
    amateus amateus January 2021 Development
  • Foundation - From awesome books to a Macintosh TV special???What odd times we live in. I've been out of the loop for a little bit and didn't realize that there was a digital Mac tv station available. And it's …

    ... 've been out of the loop for a little bit and ...
    Bloppinius_Blarp Bloppinius_Blarp June 2021 Chit chat
  • Batty Bug???I am not sure if this is well known or not Batty has gone a bit Batty . The ball goes from the bat to the top RHS corner in an infinite loop . I h…

    ... RHS corner in an infinite loop . I have had it going ...
    harriusherbartio harriusherbartio October 2021 Games
  • XYZ - a multithreaded GUI operating system for SpeccyToday I'm re-starting my unfinished project. A few years ago I wrote the yx multitasking kernel (which includes RAM/ROM versions, threads, memory man…

    ... GUI for ZX Spectrum (message loop, windows, graphics contexts, and everything ...
    tstih tstih January 2022 Development
  • Is it possible to make the Z80 execute a bizarre instruction?What happens when it gets an unrecognised instruction OP Code, I mean something following a #ED that isn't one of the undocumented instructions eithe…

    ... by some sort of infinite loop - not that I want to ...
    dmsmith dmsmith March 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ...
    call prompt
    .loop
    halt
    call scankeys ... /> call drawcursor
    jp .loop

    IF RETURN_TO_BASIC< ... a line
    djnz .loop
    ld a, (scr_out_col ... down a line
    djnz .loop
    ret

    ...
    Paradigm Shifter Paradigm Shifter August 2022 Development
  • Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…

    ... faster by deleting the pause-loop.
    If your emulator runs ...
    Anonymous Anonymous September 2001 Emulators
  • Earth Shaker PasswordsDoes anyone have a list of passwords for the classic Earth Shaker?

    ... RUSE NO DOUBT
    21 OUTER BOUNDS
    22 SPRING LODED ...
    Michael Batty Michael Batty January 2002 Games
  • Dragon's Lair 2 - MIS?Dragon's Lair 2 - Escape From Synge's Castle. Not 100% on this, but there doesn't seem to be a TZX of this and it doesn't seem to be on the MIS list…

    ... trial and error really. I loop my tape deck to my ...
    Andrew Barker Andrew Barker August 2001 MIA/STP/SDP
  • Anyone need help TZXing for MIA/MIS ?Hiya folks, A lot of chat but no files yet [img]/__forums/images/smiles/icon_wink.gif[/img] So does anyone have any of the titles in the MIA/MIS li…

    Martin , I think there is a game called Froot Loop by NTD Software in the MIA / MIS lists which I uploaded the other day . Did it uploaded okay ? If not let me know and I'll try again as I have the original tape .

    Regards

    Dean
    Dean Lowery Dean Lowery April 2001 MIA/STP/SDP
  • speccy soundI know this sounds a bit vauge but can anyone explain to me why the music on some 48K games was so amazing and so much better than the usual beeper s…

    ... beeper routine (tm) into a loop and have the 50 hertz ...
    Joffa Smifff Joffa Smifff November 2001 Sinclair Miscellaneous
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... ; number of horizontal characters
    loop..LD (HL),255
    ........INC ... HL
    ........DJNZ loop
    ........RET

    Vertical ...
    Dr BEEP Dr BEEP October 2001 Sinclair Miscellaneous
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... /> RRA ;



    LOOP ADD A,L ;
    JR ... /> LD A,C ;
    DJNZ LOOP

    POP DE ;
    rtunes rtunes October 2001 Sinclair Miscellaneous
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... ,B
    RRA

    LOOP ADD A,L
    JR ... /> LD A,C
    DJNZ LOOP

    POP DE
    rtunes rtunes October 2001 Sinclair Miscellaneous
  • machine code basicsWondered if anyone can help me out. I have been playing round with some disassemblers (Zeus). And Machine code loaders. All I want to do is print my…

    ... />
    LD HL,message
    loop: LD A,(HL)
    OR ...
    INC HL
    JR LOOP
    message: DEFM "THIS IS ...
    Dr BEEP Dr BEEP August 2001 Sinclair Miscellaneous
  • Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …

    ...
    . LD B,0
    . LOOP LD (HL),#F1 ; Intrupt routine ...
    . INC HL
    . DJNZ LOOP
    . LD (HL),#F1 ; 257 ...
    Dr BEEP Dr BEEP August 2001 Sinclair Miscellaneous
  • Microdrive woesHi there! Just managed to pick up a 2nd hand Microdrive and interface one... Came with an introductory program which doesn't seem to load. Since its…

    ... enough time for the tape loop to make 1.4 revolutions ...
    JHutcheson JHutcheson March 2002 Sinclair Miscellaneous
  • SPIN V0.2 Now Available[Standard CSS cut'n'paste message] Hi all! Well, again another update, but we think this one's well worth it. There's numerous additions and fixes,…

    ... into it. The main emulation loop is going really well, and ...
    Dunny Dunny June 2002 Emulators
  • ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…

    ... />
    ld bc,020h
    loop ldir
    ld bc,020h ... ; rather than loop with the last ld bc ... attribute map
    jr nz,loop ; we've not so go ...
    Anonymous Anonymous June 2002 Games
  • Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …

    ...
    LD B,NO_OF_BYTES
    LOOP : BIT 0,(HL) ; test on ... HL +1
    NEXT: DJNZ LOOP ; do loop until ready
    RET
    Dr BEEP Dr BEEP July 2002 Sinclair Miscellaneous
  • Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …

    ... bit
    ......jp nc,buildmask ;loop uless we find the first ... b ;here starts the main loop
    ......jr z,done ;jump ...
    Mikie Mikie July 2002 Sinclair Miscellaneous
  • BASIC-code challengeFor the BASIC-coders among us. There is a number that has following aspects. divided by 16 remains 15 divided by 15 remains 14 divided by 14 remain…

    ... if anyone would built a loop from 1 to number and ...
    Dr BEEP Dr BEEP July 2002 Sinclair Miscellaneous
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