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<1…9101112131415…34>
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... /> SPR_xpos equ 0 ; BYTE
    SPR_ypos equ 1 ; BYTE
    SPR_def equ ... halt ; Wait for next 50hz interrupt.
    ret


    ld a,(de) ; Read pixel BYTE
    inc de ; Must INC ...
    ASM ASM October 2010 Development
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... long R,7==1
    ;interrupt routine MUST reset R,7 ... /> ;0 - silent
    .BYTE 0, 0
    .BYTE silent


    ;SILENT
    ;play nothing, wait for interrupt ...
    Fikee Fikee November 2010 Development
  • 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…

    ... ebp+PROFILE_start]
    movzx eax,byte [ebp+PROFILE_fill]
    movzx ... ebx

    cmp byte [ebp+PROFILE_mode],COPY
    je ...
    .fill: ldi ; Copy BYTE
    dec hl ; Fill so ... should be made during an interrupt. Emulator authors and/or ...
    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…

    ... the game registers and interrupt mode as I took ... SNA_iff equ 19 ; BYTE
    SNA_r equ 20 ; BYTE
    SNA_af equ ... SNA_int equ 25 ; BYTE
    SNA_border equ 26 ; BYTE
    SNA_listlen equ ... BC


    mov byte [iff2],243 ; DI
    test ...
    ASM ASM November 2010 Sinclair Miscellaneous
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... /> SPR_xpos equ 0 ; BYTE
    SPR_ypos equ 1 ; BYTE
    SPR_def equ ... halt ; Wait for next 50hz interrupt.
    ret


    ld a,(de) ; Read pixel BYTE
    inc de ; Must INC ...
    sekrets sekrets November 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... /> SPR_xpos equ 0 ; BYTE
    SPR_ypos equ 1 ; BYTE
    SPR_def equ ... halt ; Wait for next 50hz interrupt.
    ret


    ld a,(de) ; Read pixel BYTE
    inc de ; Must INC ...
    ASM ASM November 2010 Development
  • FRAMES counter...Hi Folks, I wrote a test program that uses FRAMES to generate a clock. When I tested this within BASin it worked well and kept near perfect time. …

    ... , is updated by the BASIC Interrupt Service Routine, which runs 50 ... might expect - the most significant byte is 23674, so the timer ...
    na_th_an na_th_an January 2011 Sinclair Basic
  • Z80 Processor Interupt helpHi everyone, Currently designing a Z80 computer and i need a little help with these interupts. If i have an I/O device that sends a pulse to the int…

    ... instruction will be a one byte restart instruction.
    - IM 1 ... bus. The value of this byte and the current value of ... , which is actually a one byte CALL instruction, so the same ... TMS to acknoledge the interrupt, from the interrupt routine.

    If ...
    mcleod_ideafix mcleod_ideafix January 2011 Hardware
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... in the normal version, including multi-colour support, floating bus and ... compatibility with [i]any[/i] peripheral for the real Spectrum
    Philip Kendall Philip Kendall January 2011 Development
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... multiple mass storage devices (FAT32), interrupt driven (and polled) peripherals, etc ... allocate and has a 6 byte per allocated block overhead. The ... the algorithm to a 4-byte overhead with even block ... need to make one circular byte buffer for example and reuse ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Development
  • Where's it all going?[Rerouted from 'Assembler Intricacies' in Development Forum] [QUOTE=Timmy;506104]I don't think we're in disagreement here. As I've said it's a niche…

    ... having flicker-free sprites without interrupt synchronization was never something that ... to discover that every last byte was being used to produce ...
    Turkwel Turkwel January 2011 Sinclair Miscellaneous
  • Gigascreen - programming guideDoes anyone know of a programming guide for the 128K gigascreen screen mode, specifically a persistence colours table, some code (pref. C level or BA…

    ... LD A,(DE) ;Get 1 byte of colour
    LD (HL ... LD BC,15 ;Copy colour byte 15 times...
    LDIR ;...to ... />
    INC DE ;Next byte in colour table
    LD ...
    HALT ;Wait for 50Hz interrupt

    LD BC, ...
    joefish joefish February 2011 Development
  • Flip Screen vs ScrollingWhich do you prefer? I've always liked flip screen games but I had a C64(spit) owning friend who hated them with a passion.

    ... edge , showing an illusion of multi-directional scrolling. Quite why it ... shift with carry on every byte of the display you want ...
    ccowley ccowley February 2011 Games
  • Beepola Source CodeAs I haven't done much with it for a few months, I'm releasing the Beepola source code in case anybody wants to play about, add to, or otherwise use …

    ... desired location of the
    // interrupt vector table (e.g. 0xFE00 ... SongData, BOOL bSongDataOnly, int iAddress, BYTE cBorderCol,
    BOOL bLoop, int ...
    ccowley ccowley March 2011 Development
  • SAVEing without waiting for keypresshello, here's question for y'all. is there a way in BASIC to bypass the "Start tape, then press any key" prompt when SAVEing an array? sorry if it'…

    ... lead-in tone and flag byte, and without any pause or ... /> DI ; 32616 243 disable maskable interrupt
    JP $04FE ; 32617 195 ...
    Battle Bunny Battle Bunny April 2011 Sinclair Basic
  • 50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…

    ... insert some outs and alter interrupt handler. i had enogh troubles ... you all complain when my multi-colour effects don't work ...
    Ketmar Ketmar April 2011 Development
  • So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…

    ... test because it uses an interrupt routine that takes up more ... keypad reading code in the interrupt routine, whereas the the +3 ... disk access code in the interrupt routine. So if you put ... mile. Its got full lower byte I/O decoding so even ...
    chev chev April 2011 Sinclair Miscellaneous
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... , starting at the zero'th byte, as Z80 instructions.
    4 ... your Z80 emulation simulate an interrupt if interrupts are enabled, and ...
    ccowley ccowley April 2011 Emulators
<1…9101112131415…34>

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