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<1…19202122232425…34>
  • Question about DivIDEHi guys, Tell me this... (please) DivIDE features an "auto-mapping feature transparently maps shadow ROM at important entry points". Depending on …

    ... transparently maps shadow ROM at important entry ... adress #0, #8, #38, #66, #4c6 and ... to 512kB ram + 512kB rom.

    ----------------------------------------------------------------------------------------------------------------------------------< ...
    velesoft velesoft June 2011 Hardware
  • Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…

    ... can be accessed through a ROM-call with a few routines ... program
    ret z
    rst 16 ; display key (also ENTER ...
    Dr BEEP Dr BEEP June 2011 Development
  • Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…

    ... you do so that the ROM will reset them properly.[/QUOTE ... ]

    #38 or 56 decimal will PUSH ...
    Dr BEEP Dr BEEP June 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…

    ... uk/zx82.htm"]Spectrum 48K ROM[/URL] is implemented as ... hl), b ; reset AT_FLAG
    rst 8 ; error "B Integer out ... now depends on the 48K ROM, everything still works just ... automatically to the 48K ROM prior to executing anything.
    Einar Saukas Einar Saukas 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…

    ... (hl), b ; reset AT_FLAG
    rst 8 ; error "B Integer out ... it somewhere else), but the ROM doesn't seem to handle ...
    Einar Saukas Einar Saukas August 2011 Development
  • checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…

    ... BC,16 ;new len
    RST 48 ;MAKE_ROOM 00048
    POP ... be found in ROM, I think! (Note: 48K ROM used)
    The ...
    roko roko September 2011 Sinclair Basic
  • checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…

    ... =roko;563447]
    [CODE]
    RST 48 ;MAKE_ROOM 00048
    [/CODE ... be found in ROM, I think! (Note: 48K ROM used)
    [/QUOTE ...
    mattsteel mattsteel September 2011 Sinclair Basic
  • User Defined GraphicsCan someone please give some very simple code for a displaying a UDG at a location on screen? Any assistance would be greatly appreciated. Sincerely…

    ... Ooze, if you're using ROM calls you need to point ... routine for printing chars (the rst 16 thing) just using the ... fonts for Stamp Quest). The ROM calls can cause problems and ...
    R-Tape R-Tape September 2011 Development
  • Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…

    ... text printing routine that used RST 16, with the ASCII code ... just how much stuff the ROM routine does and I thought ... using the character set in ROM just for simplicity's sake ...
    Zoltar Zoltar September 2011 Development
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... stack the logical operator, call RST $28 and then call FP_TO_BC ... 16 bits & strings in ROM
    roko roko October 2011 Sinclair Basic
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... with PASMO

    ;Rutinas ROM
    STK_TO_BC equ 2307h
    jr z,DoXOR
    rst 8 ;If not, emit a ...
    mcleod_ideafix mcleod_ideafix October 2011 Sinclair Basic
  • FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…

    ... ]SZX snapshot with patched ROM and BASIC test code[/ ... at the beginning of the ROM spare area, located from ... call FN error in ZX ROM.
    ;(c)2011 ... the workspace and the RST 18h routine for allocating ... SCANNING as in the original ROM code.

    - ...
    mcleod_ideafix mcleod_ideafix October 2011 Sinclair Basic
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... 't call a ROM routine which uses IX ... />
    rst $20 ;step over +
    rst $20 ;step ... af

    rst $20 ;step over operator
    rst $20 ;step over ,
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • Classics ported or cloned on good ol' SpeccyHi, Spectrumists! I'm a fan of classic arcade games and I would like to know from you what do you think about ports or clones of such games on the S…

    ... br /> If you use custom rom in +3 allram mode then ... at adress #0,#8,#38,#66,#4C6,#562,#3D00-#3DFF ... /> . If you in rom disable running CPU on this ... .
    Divide replace ZX rom with this:
    1) ... in low 16kB instead ZX rom. Writeprotect is selectable.
    ...
    velesoft velesoft November 2011 Games
  • 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 …

    ... of...basically just replaces the RST 16 command - I won't ... but instead of using the ROM
    ;routine to do all ... of all the crap the ROM does and free to use ... character just like PRINT....or RST 16)
    pop de
    Turkwel Turkwel November 2011 Development
  • 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 (…

    ... together and poke into the rom default udg area. It' ... ,2 ;quick routine so using ROM, upper screen
    call ... ;using ROM to display no of key presses
    rst 16
    ld a,2
    rst 16
    xor a
    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 ...
    jr c, l_ef12 ; eeb3 38 5d
    dec c ; eeb5 ...
    jr c, l_ef05 ; eec9 38 3a
    ld c, $03 ...
    jp jp December 2011 Infoseek database
  • 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 ;/
    db #04 ;*
    db #38 ;end
    call FP_TO_BC ;now ...
    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…

    ... USR
    GETARG: rst $20
    call SCANNING ...
    rst $18
    cp ","
    call STAKBC
    rst $28
    defb $ ... 04,$01,$05,$01,$38
    ; multiply dividend ...
    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 ... the routine names in the ROM. It accepts both start and ...
    Battle Bunny Battle Bunny December 2011 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…

    ... 't rely on the Spectrum ROM to do the work for ... !". If you do use the ROM please remember to credit Mr ... ! 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 ... ) was written using both those ROM routines - as the book I ...
    bobs bobs January 2012 Development
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... 2As/+3s include a dedicated ROM (ROM 0) which is the original ... 48K ROM. Can you do this ... +3 models contain 64kB rom. One 16kB part is ... is incompatible with original ZX48 rom. On models +2A/+ ... table vectors in range #38-#3A. On adress #38FF ...
    velesoft velesoft January 2012 Games
  • M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?

    ... ;STACK_A
    RST $28 ;FP_CALC
    DEFB $04,$38
    CALL $2dd5 ...
    Battle Bunny Battle Bunny January 2012 Development
  • M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?

    ... BASIC variable A, using the ROM's calculator, typical steps would ... be stacked prior to a RST $28 by calling $2ab6 STK_STORE ...
    Battle Bunny Battle Bunny January 2012 Development
  • 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…

    ... way around most of the ROM like the back of my ... intercept certain portions of the ROM and perform those jobs much ... faster? Think of intercepting the RST $28 opcode for example, to ... which doesn't use the ROM wouldn't lose anything; BASIC ...
    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…

    ... intercept certain portions of the ROM and perform those jobs much ... faster? Think of intercepting the RST $28 opcode for example, to ...
    guesser guesser January 2012 Hardware
  • 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…

    ... try it without modified ROM: these models has special ... Here is this modified 48 rom with installation code for ... mode and install this rom to writeprotected 16kB ram ... br /> OUT (23),A
    RST 0

    * [ ... br /> After install is rom usable, but reset jump ...
    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.…

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


    The ...
    Z80user Z80user March 2012 Development
<1…19202122232425…34>

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