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<1…23242526272829…34>
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... br /> ld (hl),a
    inc hl ;inc increases the register by ... jr z, roadleft
    inc hl
    inc hl
    roadleft
    ... jr nz, checkright
    inc hl
    inc hl
    checkright
    ... jr nz, checkright
    inc hl
    inc hl
    checkright
    ...
    buzzy buzzy September 2012 Development
  • Converting UDG to 2x2I've got a udg that I want to display in different sizes. Obviously I just print it for normal size, I can use the udg in bin format to display it ea…

    I reinvented the wheel for ZX Basic a bit ago...

    [code]' My own dbl size.

    ' Mi idea es usar una tabla para la expansi?n de los nibbles.
    ' Para cada byte, se aislan los nibbles, se obtiene la tabla,
    ' y se vuelca dos ...
    na_th_an na_th_an October 2012 Sinclair Basic
  • UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…

    ... x 8
    add hl,de ;hl = address of character graphic ... hl,de ;hl = row address in table
    ld e,(hl)
    inc hl ...
    ld d,(hl) ;de = ... ;write a byte
    inc hl ;next byte of graphic, ... +1
    inc d ;next byte of ...
    joefish joefish October 2012 Development
  • UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…

    ... /> add hl,hl ;hl x 2
    add hl,hl ;hl x 4
    add hl,hl ;hl x ... hl,de ;hl = row address in table
    ld e,(hl)
    inc hl
    ld d,(hl) ;de = screen row ... ),a ;write a byte
    inc hl ;next byte of graphic, +1 ...
    joefish joefish October 2012 Development
  • my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…

    ... de; store value
    inc hl, hl: ld e, (hl); inc hl; color right
    ld ... by 4
    pop hl: ld (hl), a: inc hl; put the result in ...
    bra1:
    pop hl: ld (hl), a: inc hl
    , Replacement test H ...
    g0blinish g0blinish October 2012 Development
  • High Score ASCII array reset ?Hey guys, Noob alert! I'm working on my first game and I'm having problems with the high score on the second time through the game loop. My high …

    ... ,6
    loop: ld (hl),"0"
    inc hl
    djnz loop
    Battle Bunny Battle Bunny October 2012 Development
  • my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…

    [PHP] device zxspectrum128
    ORG #6000
    begin
    ld h,#58
    bra: rr(hl):inc hl
    res 2,h:jr bra
    end
    display /d,end-begin
    savesna "test.sna",begin[/PHP]

    9 bytes)
    or 8 if use some tricks
    g0blinish g0blinish October 2012 Development
  • High Score ASCII array reset ?Hey guys, Noob alert! I'm working on my first game and I'm having problems with the high score on the second time through the game loop. My high …

    ... ,6
    loop: ld (hl),"0"
    inc hl
    djnz loop
    BloodBaz BloodBaz October 2012 Development
  • smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…

    ... NextVar:push bc
    inc hl
    inc hl
    ld bc,5< ... rst $10
    pop hl ;HL=(VARS)
    ld de,4 ... add hl,de
    add hl,de
    dec hl
    ld (hl),b ...
    Battle Bunny Battle Bunny October 2012 Sinclair Basic
  • Compressors are available for Speccys ?Hi folks, although I was an wasn't strictly a speccy coder in the glory days (amstrad & amiga for the most part), I have secides to arse about with …

    ... b,a
    ld c,(hl)
    inc hl
    ld iyh,b ... /> ret nz
    ld a,(hl)
    inc hl
    rla
    ret ... b,a
    ld c,(hl)
    inc hl
    push bc
    ld a,(hl)
    inc hl
    rla
    ap_endbit ...
    Metalbrain Metalbrain November 2012 Development
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    [code]
    ld a, (hl)
    inc hl
    adc a, a
    ... ,(hl)
    adc a,a
    inc l
    ret nz
    inc ...
    Dr BEEP Dr BEEP November 2012 Development
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    ... exo_gb4:
    ld a, (hl)
    inc hl
    adc a, a< ... exo_gbm:
    ld a, (hl)
    inc hl
    adc a, a< ... exo_gbg:
    ld a, (hl)
    inc hl
    exo_gettingbits:
    adc ...
    antoniovillena antoniovillena November 2012 Development
  • IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…

    ... when it should have been INC HL), and as the code built ...
    R-Tape R-Tape November 2012 Development
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    ...
    ex de, hl
    inc iyl
    pop hl
    dec ixl ... />
    exo_gb4:
    ld a, (hl)
    inc hl ;if initial l
    antoniovillena antoniovillena November 2012 Development
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    ... decompression routine, you must point HL to your compressed binary, and ... nz
    ld a, (hl)
    inc hl
    adc a, a
    I should preload HL with the source?[/QUOTE]
    antoniovillena antoniovillena November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... br /> .msgprt ex de,hl ; remember hl as it contains pointer to ... otherwise print control character
    inc hl ; point to next control ... $10 ; print it
    inc hl ; point to next character
    hl ... pop hl/pop af",
    [*] ...
    snigfarp snigfarp November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... />
    .msgprt push hl ; remember hl as it contains pointer to ... otherwise print control character
    inc hl ; point to next control ... long
    pop hl ; recall hl with pointer to message ... $10 ; print it
    inc hl ; point to next character
    snigfarp snigfarp November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... br /> add hl,hl ; multiply HL by 8 ...
    add hl,hl ; ... giving ... inc d ; point DE to next pixel row on screen
    inc hl ... ; point HL to next pixel row ...
    pop hl ; retrieve character pointer
    inc hl ; increment it ...
    snigfarp snigfarp November 2012 Development
  • Compressors are available for Speccys ?Hi folks, although I was an wasn't strictly a speccy coder in the glory days (amstrad & amiga for the most part), I have secides to arse about with …

    ... nz,apnogetbit1
    ld a,(hl)
    inc hl
    rla
    apnogetbit1 ... nz,apnogetbit2
    ld a,(hl)
    inc hl
    rla
    apnogetbit2 ... nz,apnogetbit3
    ld a,(hl)
    inc hl
    rla
    apnogetbit3 ...
    Metalbrain Metalbrain November 2012 Development
<1…23242526272829…34>

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