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<1…13141516171819…34>
  • Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…

    ... (hd_11),hl ; execute main2
    rst $08 ; by using the if1 ...
    out ($fe),a
    rst $10
    defw $0d6b
    jp jp December 2009 Development
  • just thinking about ...compo for zx 16k ? anyone ?

    ... 0xffff, which would be an RST 0x38 instruction, which is exactly ...
    gasman gasman December 2009 Development
  • How much ram has my ZX Spectrum?How can I see how much ram my ZX Spectrum has? C64 has this info in the title screen, the Spectrum not. Thanks! Micky

    [QUOTE=RST#08;410145]Try:

    PRINT 65536-USR 7962Nx[/QUOTE]Thanks! Gives: 41473. It is a ZX Spectrum with 48K.


    Micky
    -Micky -Micky December 2009 Hardware
  • ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…

    ... external programs. Functions available on rst $08: open, read, write, close ...
    phoenix^ra phoenix^ra December 2009 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ... ; return if it is
    rst 0x10 ; print the char
    Winston Winston December 2009 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ... ; return if it is
    rst 0x10 ; print the char
    rst 10h ; print the char
    xyzzy xyzzy December 2009 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ... ; return if it is
    rst 10h ; print the char
    jonathan jonathan December 2009 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ...
    ld a,13 ;
    rst 10h ;print Return
    pop ... a
    ret z
    rst 10h
    jr WrtMsg
    xyzzy xyzzy January 2010 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ...
    ld a,13 ;
    rst 10h ;print Return
    pop ... a
    ret z
    rst 10h
    jr WrtMsg
    Chris Pile Chris Pile January 2010 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ...
    ld a,13 ;
    rst 10h ;print Return
    pop ...
    xyzzy xyzzy January 2010 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ... a
    ret z
    rst 10h
    jr WrtMsg
    xyzzy xyzzy January 2010 Development
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ...
    ld a,13 ;
    rst 10h ;print Return
    pop ...
    Dr BEEP Dr BEEP January 2010 Development
  • ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…

    ... external programs. Functions available on rst $08: open, read, write, close ...
    zilog zilog January 2010 Development
  • MOD calculator function?How do I for example, do LET a=(MOD n,9). I can do it a long winded way using cross-addition until the answer is a single digit. So 13763 MOD 9 wou…

    ... MOD would be

    RST 28H ;; FP-CALC
    DEFB ...
    Geoff Geoff January 2010 Sinclair Basic
  • Anybody got a hack for PAW'd games?Has anybody got a hack to browse the text in PAW'd games?

    ...
    jr c ,bbb
    rst $10
    bbb inc hl ... /> jr nc, fff

    rst $10
    jr ddd

    fff sub $80
    rst $10
    jr bbb
    Bandit Bandit January 2010 Sinclair Miscellaneous
  • What means the suffix by 74LS IC's?What means the suffix by 74LS IC's? I mean: 74LS32N or 74LS74AN A, N, AN or sometimes nothing. Micky

    ... 's, that is).
    [QUOTE=RST#08;428701](..) although there are ...
    RetroTechie RetroTechie March 2010 Hardware
  • Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…

    You could use the rom-routine RST 16 (decimal).
    The A register holds the code of the character that is to be printed.

    (It's the BASIC PRINT command)
    zx128k zx128k March 2010 Development
  • Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…

    ... could use the rom-routine RST 16 (decimal).
    The A ...
    frobush frobush March 2010 Development
  • Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…

    ... 255
    ret z
    rst 16
    jr print_text
    FrankT FrankT March 2010 Development
  • Which reset method on ZX 48K?What reset method is correct on issue 3b ZX 48K: One wire to R68 and one to C27 (Manual from ZX Spectrum +) or One wire to Pin 26 from CPU and one …

    [QUOTE=RST#08;431080]That brings back ...
    Alien 8 Alien 8 March 2010 Hardware
  • Which reset method on ZX 48K?What reset method is correct on issue 3b ZX 48K: One wire to R68 and one to C27 (Manual from ZX Spectrum +) or One wire to Pin 26 from CPU and one …

    [QUOTE=RST#08;431231]Wouldn't be ... do.[/QUOTE]

    Thanks RST#08, I will definitely look ...
    Alien 8 Alien 8 March 2010 Hardware
  • Which reset method on ZX 48K?What reset method is correct on issue 3b ZX 48K: One wire to R68 and one to C27 (Manual from ZX Spectrum +) or One wire to Pin 26 from CPU and one …

    [QUOTE=RST#08;431298]Yes, sorry, I ... /> Nx[/QUOTE]

    Thanks RST. It only occurred to me ...
    Alien 8 Alien 8 March 2010 Hardware
  • tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …

    ... /> PRAT LD A,22
    RST 16
    LD A,B ...
    RST 16
    LD A,C ...
    RST 16
    RET
    [/code ...
    Dr BEEP Dr BEEP March 2010 Development
  • Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …

    Probably

    RST 8
    DEFW #11E

    Although the normal RST 8 uses DEFB with only 1 single byte

    RST can only be 0,8,16,24,32,40 or 48
    Dr BEEP Dr BEEP April 2010 Hardware
  • Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …

    ... BEEP;435193]Probably

    RST 8
    DEFW #11E

    Although the normal RST 8 uses DEFB with only ... 1 single byte

    RST can only be 0,8 ...
    bverstee bverstee April 2010 Hardware
  • 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 …

    [code]
    ; PRINT AT Y,X full screen
    ; Y = B-reg, X = C-reg
    ; 0
    Dr BEEP Dr BEEP April 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 …

    Now with saving temporary colours

    [code]
    ; PRINT AT Y,X full screen
    ; Y = B-reg, X = C-reg
    ; 0
    Dr BEEP Dr BEEP April 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 …

    ... print to the screen via RST 16 then the characters will ...
    Turkwel Turkwel April 2010 Development
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