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<1…28293031323334>
  • Intermittent reset on 48K (issue 4S)I'be been fighting an intermittent selfreset the whole day. Changed ULA - did not help. Tested TR6 as i could and compared the reading with another…

    ... whole day.

    Changed ULA - did not help.


    ULA temp is about 48-50C ...
    ArtemKuchin ArtemKuchin May 2012 Hardware
  • Connecting the Toast rack to VGAHi, I've been trying to get my 128k toast rack to connect to my VGA screen for a while now with not much luck. I couldn't find a cable or adaptor to…

    ... or adaptor to go from RGB to VGA, so thought I ... different approach.. I bought an RGB - Scart cable (which works going ... not usable. I connected the RGB -SCART to a coupler, then ...
    ayster ayster May 2012 Hardware
  • Imperica Horizons - The whole weekend :-)So now it's all over, I'll do a quick writeup... It all started for me at 5.20 am. Getting to London from Devil's Island isn't so easy now that Aer …

    ... his work on the Spectrum ULA, colour timing tricks and the ...
    Winston Winston May 2012 Sinclair Miscellaneous
  • Scart problemsHi all I've just received a +2a off ebay and a scart from coolnovelties.Now when i use scart i seem to get ghosting on one telly and the one downstai…

    ... scart or something wrong with rgb on the +2a?.
    Thanks ...
    bully bully May 2012 Hardware
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... do now? Is it RAM? ULA?
    how can i check ...
    tiago tiago May 2012 Hardware
  • ZX-Paintbrush version 2.2 releasedDear readers, Today I released ZX-Paintbrush 2.2 with many new features. I hope you'll like it. Please refer to ZX-Paintbrush's section of my homepa…

    ... /> Important changes:
    [LIST]
    [*]ULA+ support
    [*]Timex screen support ...
    clausjahn clausjahn May 2012 Emulators
  • ZX-Editor Second Edition 2.1 releasedDear readers, yesterday I released a new version of ZX-Editor. Mainly, it now comes with picture support of enhanced ZXP file import as well as ULA+…

    ... file import as well as ULA+ and Timex support for the ...
    clausjahn clausjahn May 2012 Emulators
  • ULAPlus: showing different screen modes in one screenI wanted to write a demo showing the same screen, converted to various screen modes available on the Spectrum (well, a Spectrum clone capable of show…

    ... showing Timex hicolour mode and ULA+ mode).

    Currently, I ... ). The third one is a ULA+ screen (low res attributes with ... a Timex HiColour screen with ULA+ palette enabled.

    Each ... stated in the Andrew Owen ULA+ doc "Using the ULAplus 64 ...
    mcleod_ideafix mcleod_ideafix May 2012 Development
  • ULA TEST 3 results on real hardwareHi guys, I'm writing small spectrum emulator and I wanna implement precise emulation for different spectrum models :-) I found nice test for conten…

    Hi guys,

    I'm writing small spectrum emulator and I wanna implement precise emulation for different spectrum models :-)

    I found nice test for contended memory - [URL="http://wizard.ae.krakow.pl/~jb/qaop/t/ulatest3.tap"]ulatest3.tap ...
    ZXMAK ZXMAK May 2012 Emulators
  • Faulty Grey Spectrum +2 - help neededI have a faulty spectrum +2. I tested the voltaged inside - all check fine. Well, within some limit, +5 for example is 4.83, but all other voltages a…

    ... .

    I cannot swap ULA because i don't have ... . I don't know is ULA for toastrack 128K is the ... are fine. What's left? ULA and RAM.
    Cannot test ... ULA and how not idea how ...
    ArtemKuchin ArtemKuchin May 2012 Hardware
  • JSpeccy v0.91A new JSpeccy version has been released. Summary of changes, - The keyboard has been reassigned: Both SHIFTs == Caps Shift Both CTRLs == Symbol Shi…

    ... described by csmith in his ULA Book with a more wide ...
    zx81 zx81 June 2012 Emulators
  • Better Picture QualityToday I built a PSU and RGB-SCART monitor cable for my +3. However, I'm not too happy with the picture quality. It appears that there's like halos a…

    ... I built a PSU and RGB-SCART monitor cable for my ...
    MikeW MikeW June 2012 Hardware
  • Ferguson MA20 via SCART to modern TVHello, I am a newbie here but I visit this forum on regular basis to find interesting informations about computers of my life - Speccies. I have a s…

    ... Spectrum 128K (toastrack) I use RGB - Scart cable and picture quality ... +2B (black) I use RGB-Scart cable different from 128K ... http://hardware.speccy.org/hardware/RGB-Ferguson-i.html[/url]
    RGB-Ferguson-i.html[/url]
    ikci ikci June 2012 Hardware
  • Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…

    ... are they instigated via the ULA? Are Speccy interrupts per-frame ...
    takapa takapa June 2012 Development
  • ZX 128k +2 Bad deal - BrokenI recently traded a C64 for a ZX Spectrum 128k +2 (grey model). I sent a fully working C64, with doubles of the tapes I had. I recieved a shabby and …

    ... to push that into the RGB port which seems as if ...
    Johan1973 Johan1973 June 2012 Hardware
  • +2 OverheatingMust first give thanks to Dazza75 for supplying me a replacement +2 however it seems to be overheating and corrupting graphics in games making them u…

    ... be?

    Ram fault? ULA loose. If it requires resoldering ...
    zerohour zerohour June 2012 Hardware
  • Spectrum 48K help neededI hav got an old Specrtum 48K issue 3. When I plug-in power connector it doesn't show the home screen (c) Sinclair.... From about 50 times trying to …

    ... if is the RAM or ULA?

    When I got ... it working ULA and 7805 were warm (aboput ...
    btrafela btrafela June 2012 Hardware
  • 128K Toastrack colour smearHi guys! I got this 128K toastrack and connected it to my TV composite video input extracting the video signal directly from PIN 1 out of the rear R…

    ... 1 out of the rear RGB connector.

    Problem: image ...
    pkersey pkersey June 2012 Hardware
  • TK90X for trade!Hi there. I have one 48K Microdigital TK90X for trade. More info here: [URL="http://en.wikipedia.org/wiki/TK_90X"]http://en.wikipedia.org/wiki/TK_90X…

    ... cable to connect any 15Khz RGB monitor.
    Thanks. Daniel ...
    Danlucio Danlucio July 2012 Sales
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... 200mv p-to-p. The ULA video output is a lot ... when i connect the circuit. ULA is over 40C for example ...
    ArtemKuchin ArtemKuchin July 2012 Hardware
  • Spectrum Emulator that supports low resolutions and runs smoothlyHello to All, I have been trying to find a spectrum emulator that will work well through my CRT TV (using RGB to Scart) Most emulators seem to supp…

    ... through my CRT TV (using RGB to Scart)

    Most ...
    filevans filevans July 2012 Emulators
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... would be. I suspect the ULA. It gets a bit hot ...
    pmsr pmsr July 2012 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    ... soldering contacts
    - Potential bad ULA's

    But today ...
    bverstee bverstee July 2012 Hardware
  • Interesting Keyboard FaultWhy-oh-why do I keep buying half-dead Speccys off fleabay. Bought this one as a source of spares, it was listed as having a non-working keyboard due…

    ... keyboard due to a possible ULA fault, I had a correct ... response, I've replaced the ULA with no change either so ...
    napoleonblownaparte napoleonblownaparte August 2012 Hardware
  • Spectrum+ and dead keyboardI have a Spectrum+ which had no picture just snow on TV. I found instructions, that it might be regulator 7805, so I changed it. Now I saw something …

    ... , which said it might be ULA, so I changed it, but ...
    lillaolle64 lillaolle64 August 2012 Hardware
  • Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…

    ... is generated by the ULA, Chris Smith's ULA book shows it ...
    Winston Winston August 2012 Hardware
  • Spectrum 128 & bundle of peripherals for saleHi, I'm based in Brighton, Sussex, UK, looking to sell the following big bundle of bits - preferably to a local-ish buyer who can collect in person,…

    ... 'd probably smash up the RGB monitor! :cry:

    Here ... />
    - Amstrad CTM 644 colour RGB monitor (with connecting lead for ... problem with the Speccy's RGB output, with the monitor, or ...
    feline1 feline1 August 2012 Sales
  • Currah microspeech schematics?Has anyone got details on the currah microspeech? I've found the ROM online and the manual is available but that seems to be about all. What I'm afte…

    ... CPLD's to emulate the ULA. I'd like to try ...
    Basher Basher August 2012 Hardware
  • Need repair advice - noviceHello, does anyone know where I can get a professional to rejuvenate my 128 heatsink model? I know nothing of electronics and can't solder for toffee…

    ... (connected via the RGB to SCART cable)
    - RGB output shows a ... hour of use. Switching off RGB on my switchbox gives me ...
    wubble78 wubble78 August 2012 Hardware
  • Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …

    ... +2:

    CPU
    ULA
    AY-3-8912
    Spirantho Spirantho August 2012 Hardware
<1…28293031323334>

Latest Posts

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