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<1…15161718192021…34>
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... make sure
    airloop ld ix, spr_8x8
    ld hl, txt_air ...
    ld (ix+2), a ;loading the value ... :
    ; air supply
    ld ix, spr_8x8
    ld hl, txt_air ... /> ld e, (hl) ; e = low byte of screen address
    inc ...
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... /> ; air supply
    airloop ld ix, spr_8x8
    ld hl, txt_air ...
    ld (ix+2), a
    ld (ix+3), 18
    ld (ix+0), l
    ld (ix+1), h
    ld (ix), l
    ld (ix+1), h
    push ...
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... ; air supply
    airloop ld ix, spr_8x8
    ld hl, txt_air ...
    ld (ix+2), a
    ld (ix+3), 18
    inc (ix+3)
    cp 23 ;check ...
    ld (ix+0), l
    ld (ix+1), h
    ld (ix), l
    ld (ix+1), h
    ...
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... /> ; point IX it to the 4 byte sprite buffer
    ld ix, spr_8x8
    ld (ix+2), 0 ; ... end of check
    inc (ix+3)
    wearefine
    ... text_out
    ld a, (ix+3)
    cp 24 ... a,31
    ;cp (ix+2)
    ; THIS WOULD BE ...
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... supply
    ; point IX it to the 4 byte sprite buffer
    ld ix, spr_8x8
    ld (ix+2), 0 ; set ... ;end of check
    inc (ix+3)
    wearefine
    ; NEED ... CALLING text_out
    ld a, (ix+3)
    cp 24 ;check ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... stride through data 2 byte increment instead of 1< ... table. This must be 256 byte aligned
    tbl_scraddr dw ... SCRBUF_BASEADDR + #17e0

    ; 16 byte buffer for drawing graphics which ... ; 16x16 graphics. align to 32 byte boundary
    ALIGN 32
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... it used the IX register and a 4 byte buffer to draw ... code doesn't use the IX reg at all (except to ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... it used the IX register and a 4 byte buffer to draw ... code doesn't use the IX reg at all (except to ...
    Kotek Kotek July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... be aligned to a 256 byte boundary
    ; store ... table. This must be 256 byte aligned
    tbl_scraddr dw ... SCRBUF_BASEADDR + #17e0

    ; 16 byte buffer for drawing graphics which ... ; 16x16 graphics. align to 32 byte boundary
    ALIGN 32
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... stride through data 2 byte increment instead of 1< ... table. This must be 256 byte aligned
    tbl_scraddr dw ... SCRBUF_BASEADDR + #17e0

    ; 16 byte buffer for drawing graphics which ... ; 16x16 graphics. align to 32 byte boundary
    ALIGN 32
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... ; top right corner, 1 byte of collision
    ldi
    byte of collision
    ldi
    byte of collision
    ldi
    ld a, (ix+7)
    push hl
    ld a, (ix+0)
    ld b, ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... ; top right corner, 1 byte of collision
    ldi
    byte of collision
    ldi
    byte of collision
    ldi
    ld a, (ix+7)
    push hl
    ld a, (ix+0)
    ld b, ...
    Kotek Kotek July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... /> ld ix, spr_8x8
    ld (ix+2),11
    ld (ix+3),12 ... , de
    ld (ix), l
    ld (ix+1), h
    push ...
    inc hl
    inc (ix+2) ; row
    ; C -> ... /> ; 16x16 graphics. align to 32 byte boundary
    ALIGN 32
    Kotek Kotek July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    do you set up IX to point to a 4 byte buffer?
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... need to set IX to point to a 4 byte buffer (which ... like though, then do LD IX, spritedata) before calling sprite8x8a). I ... will if it writes and IX is wrong, but reading from ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... This expects IX to point to a 4 byte buffer and ... ld e, (hl) ; e = low byte of screen address
    inc ... ; hl points to high byte of screen address
    ... ld d, (hl) ; d = high byte of screen address
    ex ... be aligned to a 256 byte boundary
    adc h ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... This expects IX to point to a 4 byte buffer and ... ld e, (hl) ; e = low byte of screen address
    inc ... ; hl points to high byte of screen address
    ... ld d, (hl) ; d = high byte of screen address
    ex ... be aligned to a 256 byte boundary
    adc h ...
    Kotek Kotek July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... stride through data 2 byte increment instead of 1< ... table. This must be 256 byte aligned
    tbl_scraddr dw ... SCRBUF_BASEADDR + #17e0

    ; 16 byte buffer for drawing graphics which ... ; 16x16 graphics. align to 32 byte boundary
    ALIGN 32
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... with HL - you can use IX or IY instead but that ... .

    Returning a single byte from a routine is a ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…

    ... locations all in one 2 byte instruction, very economical @ 16 t ... DD and FD equivalents for IX and IY). It looks like ...
    dmsmith dmsmith October 2022 Emulators
  • SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…

    ... locations all in one 2 byte instruction, very economical @ 16 t ... DD and FD equivalents for IX and IY). It looks like ...
    Paradigm Shifter Paradigm Shifter October 2022 Emulators
  • The first spectrum gameThe spectrum was released in 1982,and originally came with the horizons tape so in reality the very first spectrum game had to be thru the wall on th…

    ... was infact invaders by bug byte,but im not totally sure ...
    Andy Gurr Andy Gurr September 2001 Games
  • AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…

    ... previous effects 2bit null 1 byte instrument select - Selects a user ... - 4bit AY envelope waveform 1 byte coarse control - Selects a AY ... Control - 4bit null data 1 byte fine control - Extra data for ... - 4bit master volume control 1 byte fade control 00 no fade ...
    cyborg cyborg October 2001 Sinclair Miscellaneous
  • ZX PC InterfaceA couple of weeks ago ( or is it months already? ) I told you to built an interface between Speccie and PC through the parallel port. After making so…

    ... at the time. Sent your byte in 2 parts and it ...
    Dr BEEP Dr BEEP October 2001 Hardware
  • Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …

    ... and into
    this overflow byte or something??? I am truly ...
    Duxbuz Duxbuz August 2001 Sinclair Miscellaneous
  • Certain Games Wanted - Very Good Prices PaidHi I have been after a few games now for ages and have turned to this forum as the last resort, can you help? I will pay ?5.00 for each of the follo…

    ... /> Manic Miner (silver label) - Bug Byte

    I will also ...
    paul paul December 2001 Sales
  • 1 Box full of.....2 x ZX Spectrums (48k) Original Spectrum Manuals ZX Printer (plus 2 sealed rolls of paper) ZX Interface 2 (plus Jet Pac rom cartridge) Atari compatib…

    ... - Hungry Horace, Firebird - Booty, Bug Byte - Spectral Invaders, Ocean - Daily Thompson ...
    simon simon September 2001 Sales
  • What other 'retrotech' are you into, what hardware do you own?I suppose talking about machines, hardware & software other than Sinclair is off-topic, but my retro collection was kick-started at WoS! I had heard…

    ... /> Kilobaud
    Creative Computing
    Byte

    and more books ...
    thx1138 thx1138 April 2002 Sinclair Miscellaneous
  • Nick Faldo Plays the OpenHas anyone come across the REAL Nick Faldo game put out by Mind Games NOT I repeat NOT the useless Bug Byte Software version. I am searching for a co…

    Has anyone come across the REAL Nick Faldo game put out by Mind Games NOT I repeat NOT the useless Bug Byte Software version. I am searching for a copy.
    jessie1940 jessie1940 April 2002 Games
  • Character set variableCan anybody help me? I'm trying to find out where the pointer to the ascii character set is. I remember that if you wanted to change the font on the …

    ... where in memory that 2 byte pointer lives? It's been ...
    Neil^P Neil^P May 2002 Games
<1…15161718192021…34>

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