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<1234567…34>
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    This is external memory upgrade for ZX Spectrum models with 16kB ram. ... 32768-65535 in your ZX Spectrum
    + memory upgrade to 48kB,128kB ... /> + switch for enable/disable extra memory (128kB / 1MB)
    + ... 3.5MHz as on Pentagon ZX clones)[/B]

    ...
    velesoft velesoft March 2011 Hardware
  • Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …

    ... an issue 4A 48K ZX Spectrum and am encountering some ... , load and run the memory test program again and stopped ... />
    - Occasional display synchronisation fault on entering/editing program lines ... confident that when the fault occurs, the voltage at ...
    Zorn Zorn February 2016 Hardware
  • Speed (nano seconds) of memory chips ZX SpectrumThe ZX Spectrum uses 4116 memory for the lower memory, which can be replaced by other sorts or a whole, modern, module, but when searching for 4116 m…

    The ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano ...
    Same for the upper memory:
    TMS4532-3 Texas Instruments ... seconds are needed for the ZX Spectrum.

    It ...
    georgedb georgedb August 2016 Hardware
  • ZX Spectrum +3 keyboard faultHi all I've powered on my zx spectrum +3 for the first time in a couple of years. It seems to have developed a fault with the cursor keys. I can'…

    ... /> I've powered on my zx spectrum +3 for the first time ... seems to have developed a fault with the cursor keys. I ...
    schneil schneil July 2020 Hardware
  • Building a new emulator ON the ZX SpectrumIn 1997 I wrote a ZX81-emulator for the ZX Spectrum. In 2000 I wrote a Videopac/Odessey2-emulator for the ZX Spectrum. Now I'm thinking of an emulat…

    ... a ZX81-emulator for the ZX Spectrum.
    In 2000 I wrote ... Videopac/Odessey2-emulator for the ZX Spectrum.

    Now I'm ... . Does anybody know how much memory such games needed, what kind ...
    Dr BEEP Dr BEEP May 2004 Emulators
  • ZX Spectrum +3 - incompatible ?Hello :) I'm newbie here. I know WOS site since years, never checked forum before ;) , but this moment came when I have problem. I wanna buy ZX Spe…

    ... br />
    I wanna buy ZX Spectrum +3. Why this model ? Because ... to be unplayable
    * Memory timing changes; some of the ... games from ZX48, ZX 128 are unplayable on ZX Spectrum +3 ?
    ... how compatibility with games for ZX 48 and ZX128 looks. ...
    dax dax September 2006 Hardware
  • ZX Spectrum 128k (Spares) For SaleHi I have for sale here a faulty ZX Spectrum 128k. The fault is the video appears to be broken (i am guessing). When outputted onto tv you get a dis…

    ... sale here a faulty ZX Spectrum 128k. The fault is the video appears ... is going on. The Spectrum itself is in ok condition ... little scratched but ok. This Spectrum is missing the keyboard membrane ... will include sceenshots of the Spectrum and 2 video outputs (in ...
    CU_AMiGA CU_AMiGA February 2007 Sales
  • DMA interface for ZX Spectrum[url]http://velesoft.speccy.cz/data-gear.htm[/url] This is internal DATA-GEAR interface for any 8-bit computer with Z80CPU. Use Direct Memory Access…

    ... with Z80CPU.
    Use Direct Memory Access and schematic is compatible ... DMA in MB02+ interface. On ZX Spectrum is max. data transfer speed ...
    velesoft velesoft March 2007 Hardware
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    Hi all!
    The Harlequin ZX Spectrum clone now shows full timing ... the ZX Spectrum! 8-)

    Both the ULA IO and memory contentions ...
    csmith csmith July 2007 Hardware
  • Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…

    Having released a Spectrum 16K emulator for Spectrum 48/128 machines as ... emulators which actually run on Spectrum hardware.

    Emulator ... try and do with the ZX Spectrum 16K), or emulate a programming ... allowed me to test the memory and I/O mapping ...
    Jimmy Jimmy March 2008 Emulators
  • Wanted: RGB SCART cable for heatsink 128K and ULA for issue 3 ZX SpectrumHi all, I'm after an RGB SCART cable for a heatsink 128K as well as a replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory). Can an…

    ... for an issue 3 ZX Spectrum (Ferranti ULA from memory). Can anyone help ...
    gizmomelb gizmomelb May 2008 Wanted
  • How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…

    ... wonderful technologies arriving on the ZX Spectrum, I'm beginning to ... fourth?) Z80 shared our contended memory, then we could "easily" ... multiple values in adjacent memory locations, by having CPU1 ... replace the existing memory with faster memory, would we then ...
    wilsonsamm wilsonsamm June 2009 Hardware
  • "8 CHANNELS" -ZX Spectrum BEEPER demoHi there. :) We finally managed to finish the BEEPER demo with 8-channels songs. You can get it from here: [url]http://pouet.net/prod.php?which=5…

    ... -BIT MUSIC-COLLECTION FOR ZX SPECTRUM 48K.
    PRESS ... big buffer space in memory.
    Therefore ...
    In hardware way Spectrum 48 has only one channel ... AUDIO-OUT connector of ZX SPECTRUM (jack) through ULA ... 8 such songs in 48K memory.

    ...
    Mister Beep Mister Beep November 2009 Sinclair Miscellaneous
  • zx spectrum 128K+2(gray)-vanishing colorsHi, I just got "new" zx spectrum 128k+2(gray) made in uk version. Beside tape dead and memory issue - only first 16k RAM works in 48k mode, it has s…

    ... />
    I just got "new" zx spectrum 128k+2(gray) made in ... /> version. Beside tape dead and memory issue - only first 16k RAM ... ?

    P.S. For memory I will open another thread ...
    kpuchatek kpuchatek February 2010 Hardware
  • Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…

    ... .
    I have a new ZX Spectrum 48k in my collection. Seller ... (no picture). I have this Spectrum disassembled and look what i ... or it is just some fault repair?

    Maciek
    gottrek gottrek April 2010 Hardware
  • ZX Spectrum + Issue 6A Repair attemptHello everybody! I got ZX Spectrum + which doesnt work properly. On power up I can see color mosaic, then paper goes black and i can see thin red ba…

    ... everybody!

    I got ZX Spectrum + which doesnt work properly. On ... see thin red bars from memory test. It stops here with ... ,TR5), so I suspect upper memory block. I dont know how ... IC27 instead to disable upper memory block ?
    emes30 emes30 July 2010 Hardware
  • zx spectrum +2 KM4164 vs KM41256I am trying to source replacement memory for my ZX Spectrum +2 I can get KM41256 is it compatible ?

    I am trying to source replacement memory for my ZX Spectrum +2

    I can get KM41256

    is it compatible ?
    ZXZaber ZXZaber October 2010 Hardware
  • Is this a ZX spectrum 16k or 48k?Hi! Just wondering if anyone know how much memory it is in this ZX spectrum, the seller doesn't know, I have a picture of it, the serial number is: D…

    ... know how much memory it is in this ZX spectrum, the seller doesn ...
    heALer heALer January 2011 Sinclair Miscellaneous
  • ZX Spectrum 48K, issue - works fine till it gets hot (?)ZX Spectrum 48K, issue 2, works just fine, tested with Winston's diag board. At a certain moment in time however, it seems to run hot and stalls. Whe…

    ZX Spectrum 48K, issue 2, works ... diag board claims low memory problems and the ZX malfunctions.
    ... right voltages on the lower memory chips (+5V, +12V, - ... be the culprit? The lower memory is 100% ok, works ... it for other working lower memory, I get the same ...
    georgedb georgedb January 2011 Hardware
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... project. An operating system for ZX Spectrum. A unix clone. Talked to ... be only 4 bytes of memory left for programs to run ... br /> - start up code,
    - memory management,
    - task manager,
    ZX Spectrum.

    4. There ...
    tstih tstih January 2011 Development
  • ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…

    ... bought a "new" broken ZX Spectrum +. The idea was to ... before. It has every memory chip, the Z80 and ... in sockets.
    - Lower memory chips doesn't only have ... any chance that lower memory is still fine or ... ?
    - Is upper memory more resistant or it will ...
    Zup Zup February 2012 Hardware
  • ZX Spectrum ULA core available at OpenCoresHi! On April, 23th, I opened a new project at the OpenCores website: [url]http://opencores.org/project,zx_ula,Overview[/url] Right now, it has a, h…

    ... 've written a number of ZX Spectrum clones using: this core, a ... true Z80 and true separate memory banks. This way I hope ...
    mcleod_ideafix mcleod_ideafix April 2012 Hardware
  • Full project AVR ZX Spectrum with all sourcesHello to all. Heare i put all my project AVR ZX Spectrum with cources, written under AVRStudio4.1 [url]http://dl.dropbox.com/u/12408899/Aspect128%20f…

    ... put all my project AVR ZX Spectrum with cources, written under AVRStudio4 ... and may be suppurting SD memory card. It will be great ...
    Vasil Vasil June 2012 Hardware
  • Contiki, non-existant web servers and zx spectrumafter visiting this site today, (a web server running on a c64 - [url]http://c64web.com/[/url] ) I realized contiki already available on most 6502 ba…

    ... feel a need for a zx spectrum based web server.

    zx based web server? Are there ... or proper memory management, I'm not sure if zx spectrum can do ...
    Arda Arda June 2012 Sinclair Miscellaneous
  • Developing apps for ZX Spectrum with SDCCDue to troubles with makebin utility which always starts coversion at memory address 0x0000 and can only produce binaries < 32KB, it can't be used to…

    ... always starts coversion at memory address 0x0000 and can ... t be used to create ZX Spectrum programs with SDCC. I ... and procedure to develop for ZX Spectrum using SDCC. The result ... [CODE]
    ;; crt0.s
    ;; zx spectrum ram startup code
    ;;
    tstih tstih July 2012 Development
  • ZX Spectrum problemsHello Everybody, I am new here, and I need some help in my ZX repairs : - I have a ZX Spectrum 48k board (issue 2) which power up but remains stuck o…

    ... :
    - I have a ZX Spectrum 48k board (issue 2) which ... that.
    - I have a Spectrum + (with an issue 4s board ... squares, I checked the main memory and the +5V is missing ...
    haceZX haceZX November 2012 Hardware
  • ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…

    ... VHDL code for the Spectrum ULA and Glue logic ... to perform :

    Memory decoding
    Video Generation
    Various other essential ZX Spectrum functions

    I ... other people have made homebrew ZX Spectrums, so possibly someone ...
    lezanderson lezanderson February 2013 Hardware
  • ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…

    ... VHDL code for the Spectrum ULA and Glue logic ... to perform :

    Memory decoding
    Video Generation
    Various other essential ZX Spectrum functions

    I ... other people have made homebrew ZX Spectrums, so possibly someone ...
    lezanderson lezanderson February 2013 Development
  • A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…

    ... have a few questions about ZX Spectrum assembly language programming:
    - What ... the best assembly tool for ZX Spectrum? I tried a bit the ... you can assemble directly to memory and then run programs from ...
    Zerg Zerg October 2013 Development
  • Chess on the ZX Spectrum<p>Which was the ultimate Chess Program for the ZX Spectrum?</p><p><br></p><p>Was there a superior version for the 128 K models that made good progra…

    ... ultimate Chess Program for the ZX Spectrum?
    Was there a superior ... programming use of the extra memory for strategy?I have recently ... I would like the old ZX to enter the fray. I ...
    Alien 8 Alien 8 May 2015 Games
<1234567…34>

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