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<1…18192021222324…34>
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... as $5B00 (23296) if no ROM calls or BASIC required, saving ... Alternative: call $229B/8859 (Spectrum ROM function to change border color ... ).
    ; ROM CLS = call $0DAF/3503
    ; No need to reset column counter (b) here, as ...
    ST1 ST1 November 2018 Development
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... programming. The spectrum rom has a floating point calculator (RST #28) but ... than the one in the rom , as the spectrum version uses ...
    dmsmith dmsmith December 2018 Hardware
  • problem with symbol shift and caps shift key combinations on multilayer keyboard membranesHello, I know, it is generally know that some ZX Spectrums with multilayer keyboard membranes have problems with some key combinations. Typically …

    ... , on devices connected to address bus (electrically signals are loaded just ... used code in ZX Spectrum ROM at address 654. If it ...
    cygnus cygnus January 2019 Assembler
  • Which emulators can change machine type / hardware without reset?Which emulators can change machine type / hardware without machine-reset? I think WinZ80 v4 by Gerton Lunter can do e.g. change running emulation …

    ... machine type / hardware without machine-reset?

    I think WinZ80 ...
    Luzie Luzie April 2019 Emulators
  • Spectrum +2A reset button cover.Hi everyone. I'm looking for the reset button cover from a +2A for a restoration project. Please let me know if you've got one spare. Anthony.

    Hi everyone.

    I'm looking for the reset button cover from a +2A for a restoration project. Please let me know if you've got one spare.

    Anthony.
    Anthony Anthony May 2019 Wanted
  • Flashing eeproms for a +3 - which ROM on what chip?I am wondering which ROMS go on which chip? I know the +3 as two ROM chips, ROM A and ROM B, and that I need version 4.0 roms (images from http://…

    ... the +3 as two ROM chips, ROM A and ROM B, and that ... and 3).

    Does ROM A have 0 and 1 ... , and ROM B have 2 and 3 ...
    colourclash colourclash May 2019 Hardware
  • A next Spectrum ROM with Turbo and MonitorI made a copy of a secondary ROM file that was used in my Didaktik Gama (Czech Spectrum clone with original ULA) but it was probably made for 48k Spe…

    ... for 48k Spectrum. This ROM file has modified tape recorder ... .omegahg.com/_48.htm"]this ROM collection[/url].

    ... The welcome message of this ROM is: [code]© 1988 Sinclair Research ... [/code]

    The ROM image: [quote]https://www.oldcomp ...
    pavel_krivanek pavel_krivanek July 2019 MIA/STP/SDP
  • Any other ROM cartridge / Interface two software produced for the SpectrumI just recall from the ZX Spectrum catalogue a few games were also produced on ROM cartridge, but was there any other stuff - utilities, languages or…

    I just recall from the ZX Spectrum catalogue a few games were also produced on ROM cartridge, but was there any other stuff - utilities, languages or stuff ever released in this format?
    dmsmith dmsmith August 2019 Hardware
  • How can I get Residos to work with SpecEmu divIDE Emulation? Residos ROM?Someone got Residos (current version 2.30) working with SpecEmus divIDE-Emulation? Where can I get the needed 8k-ROM/.BIN-File as SpecEmu needs e.g. …

    Someone got Residos (current version 2.30) working with SpecEmus divIDE-Emulation? Where can I get the needed 8k-ROM/.BIN-File as SpecEmu needs e.g. for divIDE-esxDOS-Emulation?!
    Luzie Luzie September 2019 Emulators
  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…

    ... a CALL to TRDOS/Betadisk-ROM (15619 on TRDOS v5).
    ROM?
    Luzie Luzie October 2019 Development
  • ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…

    ... program
    Added setting to reset configuration file to default values ... bug loading .sna files when rom 1 paged in
    Fixed ...
    chernandezba chernandezba November 2019 Emulators
  • Mag the Magician - ROM version liberated for free (16K compatible!)Hi all, I just release for free the ROM version of Mag the Magician: [url="http://www.bytemaniacos.com/?page_id=3453"]http://www.bytemaniacos.com…

    ... release for free the ROM version of Mag the ... ]

    This ROM is compatible with Interface 2 ... change your ZX Spectrum ROM with this One, you ... change your ZX Spectrum ROM with an external one. ... Interface 2 cartridge with this ROM.

    [img] ...
    radastan radastan November 2019 Brand new software
  • ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…

    ... Style
    Added setting to reset configuration file to default values ... bug loading .sna files when rom 1 paged in
    Fixed ...
    -fixed error when paging rom in ram, on case pages ... 7 = Disable ULA output (soft reset = 0)" on register 0x68
    chernandezba chernandezba February 2020 Emulators
  • Dead Space - ROM version for download (free)You can download Dead Space ROM version, for Interface II, for free now: [url="http://www.bytemaniacos.com/?page_id=3437"]http://www.bytemaniacos.co…

    You can download Dead Space ROM version, for Interface II, for ...
    radastan radastan April 2020 Brand new software
  • why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…

    ... the game.
    call 3503 ; ROM routine - clears screen, opens chan ... ) ; player's horizontal position.
    rst 16 ; set the horizontal coord ... /> ; Steps a pointer through the ROM (held in seed), returning
    ROM.
    ld h,a< ...
    digital digital June 2020 Assembler
  • this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …

    ... the game.
    call 3503 ; ROM routine - clears screen, opens chan ... ) ; player's horizontal position.
    rst 16 ; set the horizontal coord ... /> ; Steps a pointer through the ROM (held in seed), returning
    ROM.
    ld h,a< ...
    digital digital July 2020 Assembler
  • 48K ROM copyrights holderHi everyone I would like to check with you about the rights to the 48K ROM. It seems the current rights owner is Sky UK. Did anyone have any recen…

    ... the rights to the 48K ROM. It seems the current rights ... statement from Sky regarding the rom rights (like Amstrad had here ... ) which would rely on the ROM routines.
    While probably not ... , using the original ZX Spectrum ROM (48K) would make things easier ...
    claudiu_cwg claudiu_cwg October 2020 Sinclair Miscellaneous
  • edge connector... breadboard / external romso i purchased a breadboard on a edge connector.. to experiment with .. my first task to make a external rom boot (32k eeprom) so i think i got every…

    ... task to make a external rom boot (32k eeprom) so ... to romcs to disable onboard rom : using a 74hc32n as ... rd to pin 20 of rom (to make sure they are ... a bank selector (the rom file was burn on both ... of the actual rom (which was a diagnostic rom).. so my thoughts ...
    mark8bit mark8bit October 2020 Hardware
  • New Spectrum ROM: Arcade Game DesignerIn the last few days I've completely rewritten the Spectrum ROM from scratch to include AGD. Some of the functionality from version 4.8 has been los…

    ... 've completely rewritten the Spectrum ROM from scratch to include AGD ... the editor routines in the ROM, AGD users have a bigger ... playground too.

    The ROM comes with documentation. I've ...
    jonathan jonathan November 2020 Announcements
  • Electronic listings from Spectrum Shadow ROM Disassembly?I've been reading [url="https://spectrumcomputing.co.uk/index.php?cat=96&id=2000371"]Gianluca Carri's Spectrum Shadow ROM Disassembly[/url] book (Wor…

    ... "]Gianluca Carri's Spectrum Shadow ROM Disassembly[/url] book (World of ...
    JamesYoungman JamesYoungman December 2020 Development
  • zx spectrum 48k issue 6A boot fail- black paperohh whats wrong with this poor specie .. boot fail,, border white & paper black .. when reset it shows the red lines to indicate that the CPU is cycl…

    ... white & paper black .. when reset it shows the red lines ... is that it is data bus problem not addressing so unlightly ...
    mark8bit mark8bit February 2021 Hardware
  • esxDOS v0.8.9 has been officially releasedhttp://board.esxdos.org/viewtopic.php?pid=2025#p2025 [quote]lordcoxis Today 12:35:17 esxDOS v0.8.9 has been officially released. Grab it at http:…

    ... /2021] NMI: Added HiResColour modes reset on NMI entry and restore ... bugs related to (patched) 128K ROM support, it should now be ...
    Luzie Luzie April 2021 Announcements
  • boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…

    ... issue 3B .. work done : removed rom, upper ram & logic put ... all the data & address bus lines from cpu on ward ... boot from a different external rom ie zx diagnostics, or ,paul ...
    mark8bit mark8bit August 2021 Hardware
  • Missed opportunities in the 80'sAll the talk of the Loki got me thinking... What if someone had built an expansion box for the speccy that had the 3812 Yamaha music chip ( Adlib Sou…

    ... that would replace the Spectrum ROM with a RAM and loader ... base to add a S100 bus, or similar. After all, all ... , and paging RAM into the ROM slot of the Speccy was ...
    cj7hawk cj7hawk September 2021 Hardware
  • Multiface 3 hacked rom?Hi, I need to transfer some games on the +3 disk drive using my MF3. I know you need to have the MF3 pluged in in order to load the games afterwa…

    ... some kind of "hacked" MF3 rom that has this lock removed ...
    gtsamour gtsamour September 2021 Hardware
  • It's the end of the world as we know it - The great reset.Prices of fuel rocketting and therefore everything else. Food shortages. The lights going out. And millions will die. Have the Big Bugs really got to…

    ... happy.

    The great reset. Could it be for real?
    Ælita Ælita May 2022 Chit chat
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  • Searching for correct Betadisk 48k TR-DOS v4.12 ROM (Save ROM via TRDOS-Prompt to Disk)Hi,<br /> <br /> I have two ROM-Files which should be read out from an original Betadisk 48 Interface TRDOS v4.12 (ROM-Size 8k).<br /> But when I …
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