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<1…21222324252627…34>
  • Comcon programmable interfaceRemember this beast, back in 83/84? You used plugs to determine what key each direction on your joystick responded to. It apparently had two fire but…

    ... with the +2a because the ula overrides. The same is true ...
    Anonymous Anonymous February 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    ... into the spectrum, maybe the ULA is the component damaged.
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    ... /> I did notice that the ULA chip, after touching it for ... would try to get another ULA chip.
    The motherboard is ... can be replaced including the ULA.
    thoma thoma January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    Not very normal for me, the ULA can be a little hot but not realy too much, and can do it after a few minutes, not seconds. The question is where you can find another ULA? The only answer I know is other damaged spectrum.
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    Other than accidents the ula usually went first, heat dissapation or the lack it.
    john john February 2002 Sinclair Miscellaneous
  • +2aI have a +2a and it wont boot properly get the white border with black square when first powerd on but then just goes into a black screen instead of …

    ... ROM
    3) Screwed up ULA that can no longer output ...
    cyborg cyborg November 2001 Sinclair Miscellaneous
  • ZX to EGA - it works !!I finally hooked up EGA monitor to ZX. Everybody can repeat if can hold the soldering iron in the arm. The circuit diagram is simple, it contains two…

    ... , Y directly, S ( mixed , from ULA) connected to Horisontal retrace. Then ...
    Konstantin Konstantin November 2001 Sinclair Miscellaneous
  • Which emulator and assembler?Hi, I am looking to learn z80 assembly language and I feel the best option is a spectrum emulator and an assembler. Can anybody recommend the best …

    ... this contended memory and exact ULA stuff... so zx32 may be ...
    Mikie Mikie August 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    The major problem with building your own Spectrum is the ULA - it {is,was} a custom chip, and you're obviously going to need one to get a working Speccy!
    Philip Kendall Philip Kendall July 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    ... guess, but couldn't the ULA be sort of -- well -- emulated ... some additional logic, if the ULA isn't all that weird ... spectrum and take off the ula.
    Alessandro Tommasi Alessandro Tommasi July 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    Looking at the ULA from the circuit diagram it ... /> I did look for the ULA but as you say - no ...
    Anonymous Anonymous July 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    Hmm... its just a thought, but maybe u gould gather some ULA chips(and other functional pits and parts) from speccys that are otherwize disfunctional. Ppl oughto have some laying around garages and stuff.
    GH GH July 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    I have seen a Spectrum-clone from the USSR or was it Rumania??? Whatever...
    It had the entire memory and ULA-handling in only one chip. So there are
    alternatives for the ULA. ALthough the snow-effect with the I-reg was no longer....
    Anonymous Anonymous July 2001 Sinclair Miscellaneous
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    ... of what's in the ULA - Video/TV generator, I/O ...
    Anonymous Anonymous July 2001 Sinclair Miscellaneous
  • Original rubber key 48k'sThis question is to some point academic; But i seem to remeber the original 48k Rubber Keys Speccy came in versions 1,2 & 3! (way back when, occasi…

    ... low-powered version of the ULA was employed. Even so, a ... continues " The change in the ULA on the Mark 3`s ... bit now floats until the ULA has warmed up, and no ...
    Mike Jeanes Mike Jeanes July 2001 Sinclair Miscellaneous
  • Spectrum kaput! HELP!Hi! I've had a Speccy since 1988. The only problem is that it went dead 6 years ago! ...Or atleast it seems to have.If I switch it on now, all I get…

    ... to read the copyright message, ULA, processor, ROM and the first ...
    Mikie Mikie April 2001 Sinclair Miscellaneous
  • WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…

    ... 2 machine.

    The ULA chip uses the same pin ... on pin 28 of the ULA chip after the OUT, ... #FE are always one. The ULA with the lower 16K of ... of the Z80 and the ULA are connected by small resistors ... write the lower 16K, the ULA halts the processor if it ...
    Dr BEEP Dr BEEP November 2001 Sales
  • Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…

    ... M is!
    (Especially the "ULA" imitation is really funny...)
    Mikie Mikie January 2001 Sales
  • Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…

    ... has an russian clone of ULA that has different timing, so ...
    promontory promontory January 2001 Sales
  • Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…

    ... with Speccy due to different ula timing and other small differences ...
    promontory promontory May 2001 Sales
  • Where are you from / who are you / do you still use the real SpectrumJust three questions to see how divers the Spectrumworld is and how many users are still around. If you want to stay anonymous, just answer the last …

    1. Messina, on the island of Sicily (Mediterranean Sea), which happens to be part of the Italian Republic.
    2. Alessandro Grussu
    3. I would use my rubber keyed 48K every now and then, hadn't I shorted the ULA out :(
    Alessandro Grussu Alessandro Grussu March 2002 Chit chat
  • speccy 128kI have a spectrum 128k that seems to work fine and load games ok. When I power it on for the first time I get the usual options screen, no problem. B…

    I think the problem is caused by a component overheated. The ULA is the first candidate, so you can check the chip looking for excesive heat.

    [ This Message was edited by: Carlos on 2002-03-05 03:51 ]
    Carlos Carlos March 2002 Sinclair Miscellaneous
  • speccy 128kI have a spectrum 128k that seems to work fine and load games ok. When I power it on for the first time I get the usual options screen, no problem. B…

    The ULA chip seems to get a ...
    rubberman rubberman March 2002 Sinclair Miscellaneous
  • Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.

    ... not fundamentally difficult and enough ULA emulation to get the screen ...
    Philip Kendall Philip Kendall April 2002 Emulators
  • Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.

    ... (or imagination) was at the ULA side. Yes, I can imagine ... but the problem is the ULA. I think, I can figure ... ?
    (like a good Z80-ULA interaction document).
    Am I ...
    Anonymous Anonymous April 2002 Emulators
  • Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.

    ... publicly available information about the ULA-Z80 interaction. There are certain ...
    Dunny Dunny April 2002 Emulators
  • what is the best..............hi there, could anyone tell me what is the best emulater as I no longer have a spectrum but would really like to get hold of an emulator but which on…

    ... glaring bugs in the z80/ULA emulation at the moment, such ...
    Dunny Dunny April 2002 Emulators
  • ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…

    ... down to the 4 Ts ULA frequency. It would be perfect ... had all of the exact ULA details but we don't ...
    Woody Woody July 2002 Emulators
  • ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…

    ... Woody's blazingly fast ASM ULA renderer - it renders using only ...
    Dunny Dunny July 2002 Emulators
  • Replacement power suppliesIs it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you c…

    The Amperage isn't the problem.
    Ferranti, who made the ULA said "don't use more than 75% of circuits in this chip." then Sinclair said "we'll use around 90% of the ULA" and the beautiful machine has had heat dispersion problems ever since.
    JHutcheson JHutcheson August 2002 Sinclair Miscellaneous
<1…21222324252627…34>

Latest Posts

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    moggy on 9:07PM
  • Happy 40th Birthday to the Amstrad CPC464!
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  • Another Birthday! The Game Boy Is 35!
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  • I am currently watching.....
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  • European Software Titles with an English version
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  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

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