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<1…20212223242526…34>
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... . The 'HALT' instruction becomes a 'NOP' instruction that is repeated over ...
    ASM ASM October 2010 Sinclair Miscellaneous
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... a fillscreen graphics routine using LDIR.
    bigjon bigjon October 2010 Sinclair Miscellaneous
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... a fillscreen graphics routine using LDIR.[/QUOTE]

    Although I ...
    Arjun Arjun October 2010 Sinclair Miscellaneous
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... is:

    [CODE]
    NOP - No operation
    ADD - Adds ...
    Robin Robin October 2010 Development
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... ]
    First instruction
    0000 NOP - No operation
    0001 ADD ... />
    Second instruction
    0000 NOP - No operation
    0001 CAL ...
    Robin Robin October 2010 Chit chat
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... now, you had to add 'NOP' after a branch in some ...
    ASM ASM October 2010 Development
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... ; Opcode 0000 0000 - Z = A (NOP)

    0001h LDI A ...
    ASM ASM October 2010 Chit chat
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    Here is the Z80 sourcecode for the 'stack free' transfer link taken from the O.C.P editor/assembler. It requires exactly 512 BYTES of memory:

    [code]
    ; --------------------------------------------------------------------------

    ASM ASM November 2010 Hardware
  • Mikie tape error?I purchased a copy of this to play on my +2B, but something strange happens once it appears to have loaded. The screen goes black with lots of heart…

    ... 01 0c 00 $0ats
    ldir ; a7bf ed b0 $10/$15ts ... 01 0c 00 $0ats
    ldir ; a7bf ed b0 $10/$15ts ...
    jp jp November 2010 Games
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... ; 1
    retn ; 2
    nop ; 1 (.Z80 files require 3 ...
    ASM ASM November 2010 Sinclair Miscellaneous
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ...

    db 237,176 ; ldir

    db 123 ; ld ...

    ; ------------

    .copy: ldir ; Memory copy

    .next ...
    ASM ASM November 2010 Sinclair Miscellaneous
  • Override AUTOLINE start?Hi there, Is there a poke that prevents a BASIC program from auto running, when it was previously saved with the LINE command? Cheers, Steve

    ... br /> nop ; program name [1]
    nop ; program name [2]
    nop ; program ... name [3]
    nop ; program ... name [4]
    nop ; ...
    stefrobb stefrobb November 2010 Sinclair Basic
  • Ocean's Cobra - +3 incompatability. Is their a fix?Hello all, Anyone know of a fix for Ocean software 'Cobra' (the one with stallone in it) ? This was the first game I bought for my 128k toastrack, a…

    ... c ; 9603 b1 $04ts
    ; nop ; 9604 00 $04ts
    ; jr ...
    jp jp November 2010 Games
  • Help needed with simple MCode routineI'm trying to code a routine to clear the screen and I can't figure out why it's not working: ld hl,16384 ld bc, 6144 loop:ld (hl),0 inc hl dec bc l…

    ...
    ld (hl),l
    ldir

    instead?

    Turkwel Turkwel November 2010 Development
  • Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…

    ...
    LD BC,16384
    LDIR ;copy rom image 16kB from ...
    velesoft velesoft November 2010 Hardware
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... /> ; ------------

    db 237,176 ; ldir

    db 123 ; ld ...
    ASM ASM November 2010 Announcements
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... only started using LDI and LDIR now that I have matured ...
    ASM ASM November 2010 Announcements
  • BMP2SCR delta formatdoes anyone know where I can find a file specification for LCD's delta compression format used in BMP2SCR? I've tried looking at the bmp2scr source …

    ... copied to the screen using LDIR. Then again count of unchanged ...
    LCD LCD November 2010 Development
  • BMP2SCR delta formatdoes anyone know where I can find a file specification for LCD's delta compression format used in BMP2SCR? I've tried looking at the bmp2scr source …

    ... copied to the screen using LDIR. Then again count of unchanged ...
    guesser guesser November 2010 Development
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ...
    ld e,c
    ldir

    dec a
    inc hl
    ldir
    dec a
    jr ... /> ld bc,1170-1
    ldir

    skip: jr program ...
    ASM ASM November 2010 Announcements
  • BMP2SCR delta formatdoes anyone know where I can find a file specification for LCD's delta compression format used in BMP2SCR? I've tried looking at the bmp2scr source …

    ... 'ed to correct position by LDIR.
    It looks for me ...
    LCD LCD November 2010 Development
  • Genesis: dawn of a new day, new game from RetroWorks!It's been a long development, but finally we made it. We proudly present the latest game from RetroWorks, Genesis: dawn of a new day. [img]http://ww…

    ... joy fire
    nop
    nop
    nop
    nop
    nop
    nop

    org #C3B7
    nop ;can be used HALT for ...
    ld c,a
    nop

    [B][U]PATCH ...
    velesoft velesoft December 2010 Games
  • Just found this in a stack of photo'sBless him Oli, he signed my posters for me and stopped for a bit of a chat even though he was busy [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/…

    ... />
    I got cycleburner aka NOP (from the c64 group contex ...
    fog fog December 2010 Sinclair Miscellaneous
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... , so you can use even LDIR (and it has twice faster ...
    Shiru Shiru December 2010 Hardware
  • Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…

    ... ,32769 ; Source start address for LDIR
    LD DE,32771 ; Destination ... start address for LDIR
    LD BC,32764 ; Number ... bytes to copy for LDIR

    LDIR

    LD A ...
    trellis trellis December 2010 Development
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... , so you can use even LDIR (and it has twice faster ...
    Mister Beep Mister Beep December 2010 Hardware
  • Contact for KY EnterDoes anyone know how to get hold of the owner of KYenter.tk? Is he on the forum?

    ... of the speccy.org page. "Nop" offers me to albergate my ...
    elfoscuro elfoscuro December 2010 Games
  • Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…

    ... br /> ld (hl),l
    ldir
    ;
    ; Move the ...
    ld (hl),l
    ldir
    ;
    ; Ca. ... ld bc,1800h
    ldir
    ld hl,BANK7
    ld bc,0300h
    ldir
    ;
    ; G. ... br /> ld (hl),l
    ldir
    ;
    ; Run the ...
    John Elliott John Elliott January 2011 Games
  • Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …

    ...
    ld (hl), a
    ldir
    ld (25208 ), a
    ld (hl), a
    ldir
    ld (23624), a
    Joe the Iceman Joe the Iceman January 2011 Games
<1…20212223242526…34>

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