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  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    ... cut power to the then unused RF modulator!). Beside better image ... (CMOS) EEPROM or even Flash ROM [i]might[/i] be lower ... power than original ROM. Note sure about that one ...
    RetroTechie RetroTechie August 2016 Hardware
  • 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 ... resides in this ROM as there's plenty of unused space for ... , lots of programmers used this 'unused' space (by default containing all ...
    balford balford 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) …

    ... End;

    // 48K ROM TRAPS

    // Just ... 00ED);

    // $ED Unused Opcode Trap for BREAK detection ... br /> }
    // Patch the ROM Reset Routine - it moves at ... (if necessary) into the 128k ROM.

    // ...
    Dunny Dunny October 2016 Development
  • 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…

    ... an addition to existing Sinclair ROM.

    First ...
    1) ...to use unused bytes in ROM.
    2) ...safely (some ... difficult, we can even reuse ROM serial routines.

    ROM assembly).

    ...
    tstih tstih November 2016 Development
  • 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…

    ... in ROM
    .db 0xff,0xff,0xff,0xff,0xff ; 5 unused ... u]

    Well…Spectrum ROM Dissasembly says:

    [ ... ; calculate in ROM
    .db 0xff,0xff; 2 unused bytes, will ... to put debugger into unused bytes in ROM. Second is to put ...
    tstih tstih November 2016 Development
  • 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…

    ... prevent electrical contact of the "unused" pins during programming.

    ROM socket lines, and taking into ... me to pre-load FLASH ROM too, by using my specific ... ZX ROM socket protocol, once CPLD was ...
    RMartins RMartins November 2016 Hardware
  • Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…

    ... ="KipperKlank;901467"]Ok. So an unused address line is a zero ... logic.

    The 32k rom chip example had it mapped ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Hardware
  • Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…

    ... to compatibility is the Sinclair ROM which in "clone speak" is ... -S-soviet-clone-ZX-SPECTRUM-UNUSED-/322405181534?hash=item4b10d8a85e:g:0AgAAOSw44BYjIdu ... -S-soviet-clone-ZX-SPECTRUM-UNUSED-/322405181534?hash=item4b10d8a85e:g:0AgAAOSw44BYjIdu ...
    harriusherbartio harriusherbartio April 2017 Hardware
  • 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…

    ... />
    If you have an unused edge-connector socket (or an ... two connections to disable the ROM. It's not as good ... as removing the ROM but is much better than ...
    1024MAK 1024MAK April 2017 Hardware
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... be the same sprites.
    ROM permitting we could have a ... out, that the ROMs contain unused graphics like those finned bomb ... game. Funny enough, the US ROM of the game also contains ...
    RMartins RMartins June 2017 Development
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... lump of memory unused if basic and the rom is never used ...
    Alcoholics Anonymous Alcoholics Anonymous February 2018 Development
  • upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…

    ... the Z80 however, well the ROM program does need some working ... can then ignore the now unused broken pads/tracks.

    1024MAK 1024MAK September 2020 Hardware
  • ZX80 in a BoxAfter putting a [url="https://worldofspectrum.org/forums/discussion/57916/spectrum-in-a-box#latest"]Spectrum in a Box[/url] a while ago, I thought it…

    ... can switch to a ZX81 ROM via the DIP switches on ... of the unused DIP switches. In combination with the ROM select switches ...
    xelalex xelalex January 2021 Hardware
  • Paging for 64Kb of Video Ram??? What is the best way to page this?Hi all, I'm just putting together a concept card for a "Loki" style of video card, which supports shadow ( so it fits a normal Speccy ) and also t…

    ... pixel "chunky" framebuffer, with two unused bits per pixel?
    I ... 3c00-3cff, which is unused in the 48K ROM.
    This would ...
    i love the z80s i love the z80s October 2021 Hardware
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... #7F ; backtick (or (C) with ROM font)

    ; escape character ... />
    IF 0 ; this is unused atm
    skipnonws:
    ld ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • DISCOVERY ...Hi, I have just bought a DISCOVERY drive for Spectrum, but i have not the documentation with it... Do you think that i can find it on this "marvelous…

    ... know how to transfer some "ROM" from this site to Discovery ...
    P.MERCIER P.MERCIER February 2002 Emulators
  • Roms for Yase2?I was wondering if anyone knows where to get the rom-files that is needed for running Yase2. They weren't included in the zip-file, and I can't find …

    ... knows where to get the rom-files that is needed for ...
    neffuM neffuM September 2001 Emulators
  • Sound emulation...I recently souped an 486 I had with some memory, a Soundblaster 16 and CD-ROM drive. It would have been a monster just a few years ago [img]/__forums…

    ... , a Soundblaster 16 and CD-ROM drive. It would have been ...
    Fuzzbucket Fuzzbucket September 2001 Emulators
  • Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…

    ... which consisted of an 8K ROM providing assembly (excellent), forth (v ... to page in the ROM and "grab" the ROM contents but it ... PC register passes a particular ROM address when you type
    ROM and if so, have they ...
    Chris Chris August 2001 Emulators
  • UNI-DOSDoes anyone know where I can get a ROM image file of the UNI-DOS operating system . Is it freely available , or is it under copyright still ? I would…

    Does anyone know where I can get a ROM image file of the UNI-DOS operating system . Is it freely available , or is it under copyright still ?
    I would like to use it in Real Spectrum .
    Dean Lowery Dean Lowery February 2001 Emulators
  • Shadow of the UnicornI've written a program to run Shadow of the Unicorn on a +2A/+3. Is there anywhere it can be put to be available to anyone wanting to play the game?…

    ... work its best with any rom. At the least I can ...
    Anonymous Anonymous December 2001 Games
  • 48K protectionWhich games were 'protected' by loading a full 48K block of code so that no copy program could fit in to memory? I know of 2 by heard. Pole Positio…

    ... reloaded the screen over the ROM and the rest on
    Dr BEEP Dr BEEP August 2001 Games
  • Connect a Discman o soundcard into a ZX to play games without TapesDavid Madrid / Spain Hi: I like to use more my ZX machines but the load times drives my crazy and I dont like to damage the zx cassete player and t…

    ... a PC soundcard and play Rom files from PC with some ...
    David David January 2002 Sinclair Miscellaneous
  • Pentagon128I need the shematics of subj and ROM image. Does somebody have ?

    I need the shematics of subj and ROM image. Does somebody have ?
    Konstantin Konstantin November 2001 Sinclair Miscellaneous
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... is a copy of the ROM and it is prety slow ...
    rtunes rtunes October 2001 Sinclair Miscellaneous
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Latest Posts

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unused 1.1K 1.4K
rom 15.6K 29.7K

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