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  • im having problems with zx spin. im getting invalid combination of opcodes and operands errorim trying to assemble this program: [code]org 40000 ld a,0 call 8859 ld (iy+83),7 ld a,2 call 5633 call 3435 ld a,2 call 5633 ld de,d…

    ... de,data //************ here *************
    ld bc,12
    call 8252
    digital digital June 2020 Assembler
  • how do i set this code up, so i can print more than one line of text?well i got it working but how do i set this code up, so i can print more than one line of text? with a loop or something? not sure where to start on …

    ... /> ld de,data1
    ld bc,36
    call 8252
    digital digital June 2020 Assembler
  • why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…

    ... his new coordinates.
    ld bc,63486 ; keyboard row 1-5 ...
    digital digital June 2020 Assembler
  • this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …

    ... his new coordinates.
    ld bc,63486 ; keyboard row 1-5 ...
    digital digital July 2020 Assembler
  • type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…

    ...
    push AF
    push BC
    push DE
    push ...
    pop DE
    pop BC
    pop AF
    ei ... /> ld DE, $5819
    ld BC, 7
    ld (HL), $57 ...
    andydansby andydansby July 2020 Development
  • Last Problem in Chapter 3 of Toni Baker's Mastering Machine Code on your ZX Spectrum.Chapter 3 of this great book is all about how to use the registers and covers the operations LD, ADD, ADC, SUB, SBC, INC, DEC, SCF and CCF. The la…

    ... to produce a 1 if BC is greater than DE, but ... Notes
    LD BC, 0 01A000 Init BC to 10
    LD ... CARRY
    SBC HL, BC ED42 IF BC is greater than HL ...
    Scottie_uk Scottie_uk February 2021 Assembler
  • Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…

    Pity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the ZX Spectrum 48K. It was for a text/graphic adventure I'm working on. The algorithm is based on [url="http ...
    Volker Volker February 2021 Software
  • New (latest) Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike DaillyNew latest Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike Dailly V2.15.2 As seen on Facebook yesterday: [quote]Mike D…

    ... /write to return values in BC,HL and DE as described ...
    Luzie Luzie March 2022 Emulators
  • Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…

    ... root & count
    push bc
    ld a, c ; ... c ; A = largest
    pop bc
    cp c
    ret ... br /> call heapify_words
    pop bc
    djnz .reheapify
    ... br /> call heapify_words
    pop bc
    djnz .extractnext
    ...
    Paradigm Shifter Paradigm Shifter July 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…

    ... LD_SCROLL_SRC_DEST
    push bc
    ld a, (bc)
    ld e, ... offset
    push bc
    ld a, (bc)
    ld e ... 6
    .nextbyte
    push bc
    push hl
    ld ... br /> inc hl
    pop bc
    djnz .nextbyte
    ...
    Paradigm Shifter Paradigm Shifter August 2022 Development
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... print the contents of the BC register pair when it ... ...

    LD BC,16384 ; BC has 16384
    LD A ... A has 100
    LD (BC),A ; load the memory address ... by the number in BC with the number in ... or writes to memory (LD (BC),A) and increases PC. In ...
    cyborg cyborg January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... 256 as well when loading bc with numbers....i can see ...
    Andy Gurr Andy Gurr January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... from 0-255 or paired (BC, DE, HL) to store numbers ... />
    Load those figures into BC to confirm this from BASIC ...
    cyborg cyborg January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... /> LD A, 2
    LD BC, 2 ; we are putting a ...
    Arjun Arjun January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... /> LD A, 2
    LD BC, 2 ; we are putting a ...
    Arjun Arjun January 2002 Games
  • 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…

    ... c,h
    ld (COORDS),bc

    ;******************
    ... HL
    POP BC ;
    PUSH BC ;
    JR STEP ...
    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…

    ... routine:

    SCREENPOS.LD BC,0
    ..........CALL PIXELADRESS ; non ... coordinate
    ..........LD (OLDXYPLOT+1),BC
    ..........LD (SCREENPOS),DE
    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…

    SCREENPOS.LD DE,0
    ..........LD BC,0
    ..........CALL PIXELADRESS ; non-existing last plotted coordinate
    ..........LD (OLDXYPLOT+1),BC
    ..........LD (SCREENPOS+1),DE
    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…

    ... .LD DE,0
    ..........LD BC,0
    ..........CALL PIXELADRESS ; non ... coordinate
    ..........LD (OLDXYPLOT+1),BC
    ..........LD (SCREENPOS+1),DE ...
    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…

    ... de,&xx01
    ld bc,&0100
    ld (hl ... /> ld hl,(counter)
    ld bc,hl
    ret

    cyborg cyborg 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…

    ... br /> POP BC
    PUSH BC
    ... EXX ;restaurar
    ld bc,(tempbc)
    ld hl ... br /> ld (COORDS),bc
    ld e, ...
    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…

    ... de
    20 ld (COORDS),bc
    4 ld e,c ... :

    20 ld (COORDS),bc

    4 ld l ... /256
    7 ld a,(bc)
    4 inc b
    7 ld a,(bc)
    7 or (hl)
    20 ld bc,(COORDS)
    10 ret
    Dr BEEP Dr BEEP October 2001 Sinclair Miscellaneous
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