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  • Why no Sinclair if 2 support on modern hardware?Another wonder :) I appreciate that most games support Kemptson joystick so this joystick interface is used in modern hardware (Spectre/DivIDE et…

    ... ports and allow the IF2 too? The RAM turbo joystick interface ... appears to be via a ROM cartridge and a RAM turbo ...
    Korinel Korinel March 2016 Hardware
  • Mastering Machine Code on your ZX Spectrum by Toni Baker - Chapter 17 Disassembling the ROMHi All, As promised I have posted the source code for the disassembler from Chapter 17 of Mastering Machine Code on your ZX Spectrum by Toni Baker…

    ... -baker-chapter-17-disassembling-the-rom/"]here[/url].

    Thanks ...
    dbolli dbolli March 2016 Development
  • Where can I find accurate ROM functions map?Basically so I can avoid reinventing the wheel and just CALL rom if there is function there (for example, $203C, print function) that does exactly wh…

    Basically so I can avoid reinventing the wheel and just CALL rom if there is function there (for example, $203C, print function) that does exactly what I want. Would also help keep program size small.
    Darkhog Darkhog April 2016 Development
  • ROM checksum tool.A recent post by Rorthron reminded me about this category and how little activity it's had since it was set up. :-S Reading through the "preservat…

    ... .worldofspectrum.org/forums/discussion/52364/rom-checksum-utility"]in Sinclair Miscellaneous ...
    guesser guesser April 2016 Hardware Preservation
  • Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…

    ... using the ZX Spectrum Diagnostics ROM v0.33. I've left ... is the ROM. I guess the ROM could have been fried too but ... wouldn't the diagnostics ROM highlight something ... ? Although I'm guessing the ROM test does some kind of ...
    Jet5y Jet5y May 2016 Hardware
  • Complete Spectrum ROM Disassembly copyrightApologies if the answer to this question lies somewhere in the bowels of this forum, but I couldn't find any information on it. It's impossible to…

    ... of the The Complete Spectrum ROM Disassembly (by Logan and O ... SkoolKit job on the Spectrum ROM and publishing the result. Being ...
    SkoolKid SkoolKid May 2016 Sinclair Miscellaneous
  • 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…

    ... can only replace the ZX ROM, which has 16KBytes, but the ... , eventually to replace damaged originals too, but also to provide a ... a few cases for others too.
    RMartins RMartins May 2016 Hardware
  • Suggestion for ZX Uno improvementsI really enjoy my ZX Uno, however, I do see some improvements that I think could be made to the Uno. 1) When you press CTRL-ALT-Backspace or when …

    ... sure what the 48K Cargo ROM is about, nor Rooted ZX ... seems unresponsive or at times too responsive (press a key and ...
    andydansby andydansby June 2016 Hardware
  • What are the chances?Hi all, I've picked up an issue 3B, fairly clean board, no mods, wasn't starting correctly so I tried Brendan's diagnostic ROM and got this: [i…

    ... I tried Brendan's diagnostic ROM and got this:

    too.

    Thanks in advance ...
    Jet5y Jet5y June 2016 Hardware
  • ROM disassembly of CAS disk interfaceI finished disassembling of the ROM with operating system of CAS (Cheyenne Advanced Systems) disk interface. This interface is a clone of Beta 48 and…

    I finished disassembling of the ROM with operating system of CAS ( ...
    TK90XFan TK90XFan June 2016 Sinclair Miscellaneous
  • 48k Speccy died, resistors getting too hot to touchHi folks, With 2 days to go till an exhibition my trusty dual-boot 48K issue 3b that I made last year has given up the ghost and I'm not sure I ha…

    ... , the diagnostics portion of the ROM failed at SOMETHING but I ...
    witchy witchy 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 …

    ... and O'Hara's Spectrum ROM disassembly into SkoolKit format.
    rom/"]The Complete Spectrum ROM Disassembly[/url]
    SkoolKid SkoolKid July 2016 Announcements
  • Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…

    ... tested with the new test ROM in the Diagboard, for all ... easily as it was socketed too, no other logic chips had ...
    georgedb georgedb September 2016 Hardware
  • Startup colours of the Spectrum ROMHi Folks, Thought I would have a go at changing the startup colours of the Spectrum ROMs used within BasinC which ships with 48.rom (16384 bytes) …

    ... ships with 48.rom (16384 bytes) and plus2.rom (32768 bytes). Looking ... in the Complete ROM Disassembly I made the following ... br />
    In the plus2.rom file I changed:

    ROM disassembly.

    Many ...
    Paddy Coleman Paddy Coleman October 2016 Development
  • Recommend games that don't need the ROM ?I'm looking for a few games that: * Are freely available as .sna files * Do not need the ROM at all * Have motion on screen after snapshot resta…

    ...
    * Do not need the ROM at all
    * Have motion ...
    Mr X Mr X October 2016 Games
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... to replace the original Sinclair ROM. For electronically-non-literates this ...
    tstih tstih October 2016 Development
  • Mysterious error message ?Something just occurred to me, when I try to load certain JSW games which require 128k memory into my emulator in 48K mode I get this error message. …

    ... error message in the original ROM from 1982 ?! How did they ... ? He's a time traveller too :)
    ivanb303 ivanb303 December 2016 Sinclair Miscellaneous
  • ROM PRINT routine issuesHi all, I am using the ROM print routines a lot in my assembly program and I'm experiencing issues. I am changing the system variable DF CC to po…

    ... />
    I am using the ROM print routines a lot in ... character. I'm assuming the ROM print routines are updating other ...
    Kevin_C Kevin_C December 2016 Development
  • can a backup device damage the spectrum ROM?as above. been using a specmate device which seems to have corrupted my speccys ROM.

    as above. been using a specmate device which seems to have corrupted my speccys ROM.
    cypher007 cypher007 January 2017 Hardware
  • Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …

    ... with Balford's diagnostic test ROM, it passes all tests and ... up. I loaded Jet Pac too as that's only 16k ... it might be a faulty ROM (despite passing the checksum test ... no change. I put the ROM into another machine and it ...
    Jet5y Jet5y January 2017 Hardware
  • how to edit a romhi, i just wanted to know the best way to edit a rom. im going to do it in an emulator first and then run it in a spectrum.

    hi,

    i just wanted to know the best way to edit a rom. im going to do it in an emulator first and then run it in a spectrum.
    digital digital January 2017 Hardware
  • where is border/ink, etc stored in rom?hi, i just wondered where these were stored in rom and how i change these?

    hi, i just wondered where these were stored in rom and how i change these?
    digital digital January 2017 Sinclair Miscellaneous
  • ZX81 MIA's + ZX Spectrum corrected TZXAs I'm a preserver of Sinclair QL stuff since 2013 now I'm going to preserve also all my Speccy stuff that I've bought since 1983 (400/500 originals …

    ... ) Juggernaut is dumped as NORMAL ROM speed but is a Turbo ... good to send it here too or is better only that ...
    ranma_simon ranma_simon February 2017 MIA/STP/SDP
  • Harlequin Rev G - Decoupling Capacitors?Guys - I started assembling my Rev G Harlequin board over the weekend. Right after I picked it up and started loading parts, it struck me that there…

    ... somewhat poorly placed decoupling (the EPROM and the main SRAM). These ... board. Maybe I'm just too conservative. ;)
    msansom msansom March 2017 Hardware
  • Wanted - Space Raiders ROM CartridgeI keep an eye on eBay and there's a Space Raiders ROM cartridge up for sale at the moment, but I don't think it's worth £70 for such a tatty box. …

    ... there's a Space Raiders ROM cartridge up for sale at ...
    joefish joefish March 2017 Wanted
  • Are there any unreleased Spectrum games or prototypes in the hands of collectors?You know how some games for various machines were written but never released, and then a collector buys the developers' discs or whatever hardware, a…

    ... he refuses to allow the rom to be dumped (which would ... true of a Durrell game too? And some cartridge based Spectrum ...
    ewgf ewgf March 2017 Games
  • A videoaventure in 16K - Cartridge for IF2Hello all, After an intermitent work I am near of reléase my new game: a videoaventure (exploration game) in 16K ROM carttridge. Your objetive is…

    ... videoaventure (exploration game) in 16K ROM carttridge.
    Your objetive is ... éase source code, and 16K ROM file, after finish him.
    too).

    The game will ...
    radastan radastan March 2017 Development
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... issue 6a. I suspect the ROM may be bad, but other ... otherwise working speccy removing the ROM gives a very specific screen ... problem to the ROM.

    But the ROM (a NEC type ...
    Mikelone Mikelone April 2017 Hardware
  • New ZEsarUX 5.0Hi! ZEsarUX 5.0 is out! :) You can download it from the URL: https://sourceforge.net/projects/zesarux/ Finally I have succeded emulating Si…

    ... lots of dissassemblies of the ROM and testing keyboard to know ... setting to change DivIDE/DivMMC eprom firmware file
    Added setting ... allow writing to DivIDE/DivMMC eprom firmware
    Added setting to ...
    chernandezba chernandezba April 2017 Emulators
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  • Fixed Speccy Software. And which games remained unfixed?
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