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<1…20212223242526…34>
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... afraid! I managed to use RST 16 quite well, but as ... .
    [/QUOTE]

    Well RST 16 hides all the details ... got the same impression using RST 16. The spectrum is purely ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... . $FF is the opcode for RST $38, which pushes the current ...
    mcleod_ideafix mcleod_ideafix November 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... . $FF is the opcode for RST $38, which pushes the current ...
    roko roko November 2011 Hardware
  • Auto generated spritesLooking around for some graphics I came across [url]http://blog.disktree.net/?p=19[/url] , one of several such pages. Need the odd 8x8 UDG or two (…

    ... no of key presses
    rst 16
    ld a,2 ...
    rst 16
    xor a
    rst 16
    ld a,b ; ... !
    add a,48
    rst 16
    ld a,(23560 ...
    R-Tape R-Tape December 2011 Development
  • Arkanoid - Hit Squad ReleaseInfoseek (and the [URL="ftp://ftp.worldofspectrum.org/pub/sinclair/games/a/Arkanoid(TheHitSquad).tzx.zip"]TZX[/URL] itself) identifies the Hit Squad …

    ... , l_e54f ; e54c 28 01
    rst $00 ; e54e c7
    l_e54f ... ), a ; e562 d3 7f
    rst $00 ; e564 c7
    l_e565 ...
    jp jp December 2011 Infoseek database
  • Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …

    ... /> ld ix,0
    GETARG: rst $20
    call SCANNG
    inc ix
    rst $18
    cp ","
    jr ...
    Battle Bunny Battle Bunny December 2011 Sinclair Basic
  • Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …

    ... /> ld ix,0
    GETARG: rst $20
    call SCANNG
    inc ix
    rst $18
    cp ","
    jr ...
    Dunny Dunny December 2011 Sinclair Basic
  • Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …

    ... print controls
    PRCHAR: rst $10 ;print a character ... end of max_length
    rst $10
    djnz ... ;reset bit 7
    rst $10 ;print a character< ... a trailing space
    rst $10
    set 0 ...
    Battle Bunny Battle Bunny December 2011 Sinclair Basic
  • Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…

    Use the calculator, stack the numbers and calculate with RST #28
    Dr BEEP Dr BEEP December 2011 Development
  • Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…

    ... value
    call STACK_BC
    rst #28
    db #05 ;/
    Shiru Shiru December 2011 Development
  • Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…

    ... ,hl ;undo USR
    GETARG: rst $20
    call SCANNING
    rst $18
    cp ","
    jr ... ,100
    call STAKBC
    rst $28
    defb $04,$01 ...
    Battle Bunny Battle Bunny December 2011 Development
  • Tool for saving prog op codes in one neat column?[deleted]

    ... ,(IY+1)
    28B6 DF RST 18
    28B7 CD8D2C CALL ... C,A
    28C1 E7 RST 20
    28C2 E5 PUSH ...
    Battle Bunny Battle Bunny December 2011 Development
  • Original Derby SpecificationI've scanned an original Derby specification, from Nov 1985, and uploaded it to my site - I think I acquired it during my fleeting association with M…

    Hi

    [QUOTE=RST#08;592235]Because on page ...
    Jose_Leandro Jose_Leandro January 2012 Hardware
  • Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…

    ... ! For your first game the RST #10 is quite usefull, combined ...
    Dr BEEP Dr BEEP January 2012 Development
  • Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…

    ... ! For your first game the RST #10 is quite usefull, combined ...
    bobs bobs January 2012 Development
  • M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?

    ...
    CALL $2d28 ;STACK_A
    RST $28 ;FP_CALC
    DEFB $04 ...
    Battle Bunny Battle Bunny January 2012 Development
  • M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?

    ... be stacked prior to a RST $28 by calling $2ab6 STK_STORE ...
    Battle Bunny Battle Bunny January 2012 Development
  • Amazonia (BUGFIX)This is a bugfix for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027280"]Amazonia[/URL], please add the following "known errors" des…

    ... another key
    a4bc c7 rst 00h ; reset computer[/CODE]
    a4bc c7 rst 00h ; reset computer[/CODE]
    Einar Saukas Einar Saukas January 2012 Infoseek database
  • Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…

    ... faster? Think of intercepting the RST $28 opcode for example, to ...
    Dunny Dunny January 2012 Hardware
  • Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…

    ... faster? Think of intercepting the RST $28 opcode for example, to ...
    guesser guesser January 2012 Hardware
  • Minimal BASICAndrew Owen has just uploaded [B]Standard ECMA-55: Minimal BASIC [/B]to the Full Books archive on WOS. Thanks! [url]ftp://ftp.worldofspectrum.org/pu…

    [QUOTE=RST#08;602918]Thanks Andy/Geoff, ...
    Geoff Geoff February 2012 Sinclair Miscellaneous
  • New project: CargandoLeches. Ultraloads with ROMHi This project has started months ago, between decicoder, macleod and me. Uses the best modulation of k7zx (throwing shavings). But this ultraloa…

    ...
    OUT (23),A
    RST 0

    * [B]RAM ...
    velesoft velesoft March 2012 Development
  • LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…

    ... print progress counter occasionally
    rst $10 ;(adds about 5% to ... print progress counter occasionally
    rst $10 ;(adds about 5% ... br /> xor a
    rst $10
    rst $10
    [/CODE]
    Einar Saukas Einar Saukas March 2012 Development
  • LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…

    ... code like JR C,$FF = RST C,$38


    Z80user Z80user March 2012 Development
  • using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…

    ... />
    stack A : stack B : rst $28 : divide : end_calc
    stack ... C : stack D : rst $28 : divide : add : end_calc
    rst $28 ... end_calc" sequence?[/QUOTE]
    rst $28
    divide
    st ...
    Geoff Geoff March 2012 Development
  • using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…

    ... C
    stack D
    rst 28h ; a, b, c, d ... />
    stack A : stack B : rst $28 : divide : end_calc
    stack ... C : stack D : rst $28 : divide : add : end_calc< ... done in a single "rst $28 ... end_calc" sequence?[/QUOTE ...
    antoniovillena antoniovillena March 2012 Development
  • Is there a ROM modification (48K) for load without typing LOAD""?The target is to play with 48K machines with keyboard broken, or an alternative solution for new clones like Superfo instead of making a new keyboard…

    ... />
    ;; SA-SPACE
    L0621: RST 30H ; BC-SPACES creates 17 ...
    Dr BEEP Dr BEEP April 2012 Development
  • INPUT LINE and STOP in INPUTWhat was the reason for the ROM Editor routine causing "down arrow" while in an INPUT LINE to cause the "H STOP in INPUT" error report? Why doesn't i…

    ... reset that occurs on a RST 8).

    Also, you ...
    BloodBaz BloodBaz April 2012 Sinclair Basic
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... NMI.SYS. Functions available on rst $08:
    open, read, write ...
    velesoft velesoft April 2012 Announcements
<1…20212223242526…34>

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