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<1…14151617181920…34>
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... hl, hl ; multiply
    add hl, hl ; by
    add hl, hl ; eight
    sbc hl, de ; subtract DE ... to get original x7
    ld de ... ; offset to FONT
    add hl, de ; HL holds address of first byte ...
    chev chev March 2011 Development
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ... hl,hl
    add hl,hl
    add hl,hl
    ld de,font_1-$0100
    add hl,de ...
    push hl ... hl,de
    add hl,de
    add hl,de

    next:
    ex de,hl
    chev chev April 2011 Sinclair Basic
  • Why I hate the 80's.Everything that I hate about the 80's can be summed up by the loading screen for this game. [url]http://www.worldofspectrum.org/infoseekid.cgi?id=000…

    ... ://translate.google.com/translate?hl=de&sl=de&tl=en& ...
    XTM of TMG XTM of TMG April 2011 Chit chat
  • Why I hate the 80's.Everything that I hate about the 80's can be summed up by the loading screen for this game. [url]http://www.worldofspectrum.org/infoseekid.cgi?id=000…

    ... ://translate.google.com/translate?hl=de&sl=de&tl=en& ...
    mile mile April 2011 Chit chat
  • 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…

    ... the optimal way to compare hl to de (both always unsigned)? i ... easier way. something like sbc hl,de and then using some flags ... flag might work but if hl or de has msb equal to ...
    tstih tstih April 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…

    ... the optimal way to compare hl to de (both always unsigned)? i ... easier way. something like sbc hl,de and then using some flags ... flag might work but if hl or de has msb equal to ...
    AndyC AndyC April 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…

    OR A; SBC HL,DE

    Then Zero set if equal, Carry set if DE greater, else no carry.
    Woody Woody April 2011 Development
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... before
    ; calculation
    sbc hl,de ; the difference between the start ...
    ; in HL
    ex de,hl ; store the offset in DE

    ld hl,strms ; store ...
    chev chev May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... hl, hl
    add hl, hl
    add hl, hl
    add hl, de
    add hl, de
    add hl, de ...
    ex de, hl ...
    Dr BEEP Dr BEEP May 2011 Sinclair Basic
  • New game! Nanako in CJMC for ZX81!Yup, that's true. We've been busy in crafting a nice, small, simple library to code games in text mode (this is, standard, unexpanded) for the 16K ZX…

    ... begin: ld hl,screen
    ld (16388),hl
    ; ... /> ld de,20
    add hl,de
    ld (hl),255
    ld hl,(16388) ;hires file ( ...
    low: add hl,de ;next hires line
    Dr BEEP Dr BEEP May 2011 Brand new software
  • Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…

    ... 209
    EX DE, HL ; 28083 235
    LD (HL), E ; 28084 115 ... 209
    EX DE, HL ; 28093 235
    LD (HL), E ; 28094 ... 209
    EX DE, HL ; 28103 235
    LD (HL), E ; 28104 ... ; 28176 167
    L_6E11: SBC HL, DE ; 28177 237 82
    JP ...
    Jimmy Jimmy May 2011 Development
  • Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…

    ... A ; 29833 167
    SBC HL, DE ; 29834 237 82
    JP ... A ; 29847 167
    SBC HL, DE ; 29848 237 82
    JP ... 0
    POP DE ; 29902 209
    ADD HL, DE ; 29903 25
    EX DE, HL ; 29919 235
    SBC HL, DE ; 29920 237 82 ...
    Jimmy Jimmy May 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    ... found
    push hl
    push de
    push de
    ;save off ... hl,hl
    add hl,hl
    ;multiply ASCII value by 8
    ld de ... ,15360
    add hl,de
    ;add it ...
    pmess_loop1 ld a,(hl)
    ld (de),a
    inc l ...
    Turkwel Turkwel June 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    ... found
    push hl
    push de
    push de
    ;save off ... hl,hl
    add hl,hl
    ;multiply ASCII value by 8
    ld de ... ,15360
    add hl,de
    ;add it ... zero found
    push hl
    push de
    ;save off registers ...
    ub880d ub880d June 2011 Development
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... calculation
    sbc hl, de ; the difference between ... hl, hl ; multiply by 4
    add hl, de ; multiply by 6
    ld de ... to FONT
    add hl, de ; HL holds address of first ... hl, de ; add the offset
    ex de, hl ; put the result back in DE ...
    chev chev June 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    ... call decode_number1
    ld de,1000
    call decode_number1 ...
    ld de,100
    call decode_number1 ... /> sbc hl,de
    jr nc,decode_number2
    add hl,de
    Turkwel Turkwel June 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    ... HL,HL
    ADD HL,HL
    ADD HL,HL
    LD DE,$3C00
    ADD HL,DE
    LD DE,(PRTPOS ...
    rich_chandler rich_chandler June 2011 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    ... /> ld hl, de ; HL = DE
    inc de ; DE = HL + 1
    ldi ; (DE) = (HL), DE ++, HL ++, BC --
    ldi ; (DE) = (HL), DE ++, HL ++, BC ...
    na_th_an na_th_an June 2011 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    ... of screen line
    ADD HL,DE ; address to draw paddle at ...
    gasman gasman June 2011 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    ... /> ld hl, de ; HL = DE
    inc de ; DE = HL + 1
    ldi ; (DE) = (HL), DE ++, HL ++, BC --
    ldi ; (DE) = (HL), DE ++, HL ++, BC ...
    ooze48k ooze48k July 2011 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    1st thing to mention is LD HL,DE is not an opcode.

    You need to use either

    LD H,D
    LD L,E

    or

    PUSH DE
    POP HL
    rich_chandler rich_chandler July 2011 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    ... /> ld hl, de ; HL = DE
    inc de ; DE = HL + 1
    ldi ; (DE) = (HL), DE ++, HL ++, BC --
    ldi ; (DE) = (HL), DE ++, HL ++, BC ...
    ooze48k ooze48k July 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... '
    pop hl ; allocated address plus one
    ld de, (0x5c4f) ; store ... system variable CHANS in DE
    sbc hl, de ; calculate offset between start ...
    Einar Saukas Einar Saukas July 2011 Development
  • New game: WUNDERCHAR$Hi All, Finally finished my latest game: Wunderchar$. [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/loadingscr.gif[/IMG][IMG]http://…

    ... /> ld de, level_tab
    add hl, de
    ld e, (hl)
    inc hl
    ld d, (hl)
    ld hl ... , current_level_data
    ex de, hl ...
    Fikee Fikee August 2011 Brand new software
  • New game: WUNDERCHAR$Hi All, Finally finished my latest game: Wunderchar$. [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/loadingscr.gif[/IMG][IMG]http://…

    ... /> ld de, level_tab
    add hl, de
    ld e, (hl)
    inc hl
    ld d, (hl)
    ld hl ... , current_level_data
    ex de, hl ...
    R-Tape R-Tape August 2011 Brand new software
<1…14151617181920…34>

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