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<1…13141516171819…34>
  • r-type in development for the sam coupehttp://cookingcircle.co.uk/ we need z80 coders graphics artists and audio this is the amstrad cpc 6128 version: https://www.youtube.com/watc…

    ... A,(INVERT) ;INVERSE MASK 00/FF TO A'
    29D2 08 ... the code of the JPUT rom routine in the sam coupe ... it is impossible for a rom routine to use the stack ...
    rogerjowett1 rogerjowett1 October 2015 Development
  • Spectrom interface ?Hi all, I got 2 of this devices ... :) [img]http://forest.no-ip.org/wos/spectrom/20151006_151428.jpg[/img] [img]http://forest.no-ip.org/wos/sp…

    ... bank filled with ff second bank with test rom, jumper in 16k ...
    gorski gorski October 2015 Hardware
  • NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…

    ... pull-up resistors are fitted, FF hex.

    In the ... CPU side data bus [CPU, ROM, upper RAM, expansion port]. If ... same time will not return FF hex, but whatever value the ...
    1024MAK 1024MAK December 2015 Games
  • New game: SolarGun 1.0[img]https://dl.dropboxusercontent.com/u/75238938/solargun4.png[/img] [img]https://dl.dropboxusercontent.com/u/75238938/solargun5.gif[/img] (that g…

    ... ; 0x39xx is a rom address with lots of ff's in 48k ...
    RMartins RMartins March 2016 Brand new software
  • ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…

    ... -=> I = 0
    CPL; #FF
    LD R,A
    ROM typically sets it to)
    ROM addressable.
    3 - Read Memory ... the logic operate on the ROM bank.
    RMartins RMartins June 2016 Hardware
  • The Complete Spectrum ROM Disassembly - SkoolKittedAs [url="http://worldofspectrum.org/forums/discussion/52745"]indicated previously[/url], I've recently been working on converting Logan and O'Hara's …

    Absolute brilliant.
    Any chance of a ROM bugs section.... please?
    Print "1234";CHR$ 9;"ff"
    or
    Print "1234"+CHR$ 9+"ff"
    and why it fails to move the cursor forward then print.
    MatGubbins MatGubbins July 2016 Announcements
  • The Complete Spectrum ROM Disassembly - SkoolKittedAs [url="http://worldofspectrum.org/forums/discussion/52745"]indicated previously[/url], I've recently been working on converting Logan and O'Hara's …

    ... ;867525"]Any chance of a ROM bugs section.... please?[/quote]
    [quote]Print "1234";CHR$ 9;"ff"
    or
    Print "1234 ... "+CHR$ 9+"ff"
    and why it fails ...
    SkoolKid SkoolKid July 2016 Announcements
  • Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…

    ... set the B register to +FF. (ROM)

    STMT-RET: 0x5B58 ... RST 8 ; ERROR-1 (ROM)
    0x5B7F DEFB +FF ; (ROM)

    After ... -STMT is used.(ROM)
    0x5BAC LD (IY+0A),FF ; IY is ...
    lfaria lfaria August 2016 MIA/STP/SDP
  • Accessing +3 DOS with DivIDE enabledI'm thinking about making a tool that copies files from a FAT partition to a IDEDOS partition. Currently, I've got two problems: - Getting the ESX…

    ... paging conditions and make appropriate ROM calls to load data from ... /> fichero:
    db 'GATITO.SCR',$ff[/code]

    This code ...
    Zup Zup September 2016 Development
  • 48K (in 48) vs 48K in 128K / +2 / +3I'm sorry I've probably overlooked this but despite a search I did not see it. :( and looking at some of the tech pages did not really answer my ques…

    ... keypad routines are in ROM 1 (the BASIC ROM) and are called ... card also resides in this ROM as there's plenty of ... ' space (by default containing all FF's) as an interrupt vector ...
    balford balford September 2016 Hardware
  • A few questions about sound and keys in BASICIf I want sound in my BASIC game I have to use BEEP right ? It seems to lock up the CPU for far too long . On Arjun's page I found how to use CALL 94…

    ...
    [/code]

    The ROM KEY_SCAN routine is at $028E ... any one key, then D=$ff and E identifies the key ...
    Battle Bunny Battle Bunny December 2016 Sinclair Basic
  • New Game - Pietro Bros [z88dk/Nirvana+][b]PIETRO BROS[/b] Pietro and Luizo were transported to pipe world after eating some rancid mushrooms on his pizza. Help them to escape from th…

    ... /+3 : disk motor off, 48k rom selected, normal paging

    out (c),a ; 48k rom selected, bank 00 at top ... - __LOADER_head

    ld a,$ff
    scf

    call ...
    Alcoholics Anonymous Alcoholics Anonymous December 2016 Brand new software
  • New Game - Pietro Bros [z88dk/Nirvana+][b]PIETRO BROS[/b] Pietro and Luizo were transported to pipe world after eating some rancid mushrooms on his pizza. Help them to escape from th…

    ... iy,128 ; move IY into ROM in case an im1 interrupt ... ,__BANK_06_size

    ld a,$ff
    scf

    ... ,LEN_NIRVANAP

    ld a,$ff
    scf

    ...
    Alcoholics Anonymous Alcoholics Anonymous December 2016 Brand new software
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... have the floating bus ("port #FF"). Therefore, you can test for ... the presence of port #FF and if after waiting for ... br /> ; Z = port #FF present, NZ = port #FF not present
    ;
    ROM page included already)
    ;db ...
    introspec introspec June 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... /> call $22DF ; Call PLOT in ROM
    ; ------------------------------------------------------------------------------
    ROM_DRAW: ... /> ld de,$0101 ; (FF=-ve, 01=+ve)
    ...
    Paddy Coleman Paddy Coleman August 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... call $22DF ; Call PLOT in ROM
    ; ------------------------------------------------------------------------------
    ROM_DRAW exx ... /> ld de,$0101 ; (FF=-ve, 01=+ve)
    ...
    Paddy Coleman Paddy Coleman August 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... must be as this is ROM code so must work. :-)
    call $0E9B
    ld (hl),$FF
    ret
    [/code]
    Paddy Coleman Paddy Coleman September 2017 Development
  • Is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of fileHi, is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of file. E.g.: I have a Tape-Code-File Start f…

    ... ($0800 VR_CONT_3) will set A=$FF and call LD_BYTES
    * Adjust ... ? - POKEs get overwritten by subsequent ROM code) then USR 1995 ($07CB ...
    Battle Bunny Battle Bunny September 2017 Sinclair Basic
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... $028E ; ROM poll keyboard
    inc e ; If E=$FF (no key ...
    Paddy Coleman Paddy Coleman September 2017 Development
  • A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…

    ... = 0
    call 8859 ;inside ROM routine BORDER ($2294)
    call ... E to compare
    cp $ff ;if it’s FFh (no ... it
    call $3b5 ;ROM beeper routine
    pop ix ... SHIFT"

    dummy_key defb $ff ;necessary for CPIR
    ;any ...
    Ast_A_Moore Ast_A_Moore October 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... $028E ; ROM poll keyboard
    inc e ; If E=$FF (no key ...
    Paddy Coleman Paddy Coleman October 2017 Development
<1…13141516171819…34>

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