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  • Are there any differencies between Speccies in different countries?I am asking for differencies of ordinary Speccies, not clones. Can I travel to foreign country, buy Speccy from fleamarket and except it will run at …

    ... they're easy to fix (except if ULA has died). Even in ... the worst case (ULA broken) you can give someone ...
    Zup Zup January 2017 Hardware
  • ZX-Paintbrush 2.6.3 and ZX-Blockeditor 2.4.2 publishedDear readers, as you see in the subject, two of my ZX-Modules applications have been updated today. The very special change, kindfully and very nice…

    ... /> I definitely indicated the arising ula+ block on an opened SCR ... thanks for repeating. I will fix this soon.
    I decided ... of a ULA+ palette should say "ula+ clut 0" to "ula+ clut 3 ...
    clausjahn clausjahn March 2017 Software
  • Spectrum Next in the ArchiveWhen the Spectrum Next is launched, should it be added to the archive, and games archived as per usual WoS usage? There are a lot of new games annou…

    [quote="hikoki;908295"]Example: Ship Fix and Nextipede
    Both work ... modes, or with a palette ULA+ or divMMC, etc. Configuration ZX ...
    Black_Cat Black_Cat May 2017 Hardware
  • 48k spectrum problems at bootHey guys so my 48k Specfy, Issue 3B is having some issues. They're not entirely consistent but the majority of the time (95%) it presents itself as m…

    Find the other ULA or an ULA replacement or find someone who would be able to test/fix it.
    Claudius Claudius May 2017 Hardware
  • Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…

    ... ULA

    The issue 3B which I’m trying to fix ... has a 6c001e-7 ULA.

    ULA into the non-working ...
    Putting the 6c001e-6 ULA back in the issue 3 ... other issues beyond a dead ULA.

    What ...
    nama nama August 2017 Hardware
  • Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…

    So the complete fix was

    - Replace TR4 & TR5
    - Replace ULA
    - Replace Z80
    - Replace 5 of the 8 RAM in the lower bank

    Phil
    nama nama August 2017 Hardware
  • Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …

    ... Maybe... BUT without redesigning the ULA, it would require a lot ... logic can fool the ULA into thinking the Z80 ... it so that the ULA only reads from this ... problem is that this "fix" will break any software ... file" just before the ULA reads that same data.
    1024MAK 1024MAK September 2017 Hardware
  • Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…

    ... (knowing it'll probably not fix it) or pack everything up ... packaging and most-likely-good ULA as the main draws.
    Kamineko Kamineko September 2017 Hardware
  • Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …

    ... problems which i had to fix, but it seem ok again ... more insight into how the ULA/ASIC works, and at some ...
    The_Bert The_Bert October 2017 Hardware
  • Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…

    ... in a bridge cable to fix the trace I'd lost ... />
    This is probably a ULA problem, right? :(

    I ...
    Kamineko Kamineko November 2017 Hardware
  • Emulation Overload!!So, **** hit fan on various fronts (including real life, which was far more serious than all this online shenanigans) a little while ago and I made t…

    ... then Spud goes on to fix by itself.

    Looking ... speccy doesn't reset the ULA Plus palette to the default ...
    Arjun Arjun February 2018 Emulators
  • Emulation Overload!!So, **** hit fan on various fronts (including real life, which was far more serious than all this online shenanigans) a little while ago and I made t…

    ... then Spud goes on to fix by itself.

    Looking ... speccy doesn't reset the ULA Plus palette to the default ... . Sounds like a quick easy fix.

    3. I reckon ... another quick easy fix.

    I'll get ...
    rich_chandler rich_chandler February 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    ... . I just noticed that my "fix" produces artifacts just next to ... ’re game, that is)—the ULA snow effect. Not essential, for ...
    Ast_A_Moore Ast_A_Moore March 2018 Emulators
  • Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…

    ... found a fault with the ULA. No sound it's totally ... fine. It that common on ULA's? I will post some ... , I have also managed to fix the Saga 1 Emperor keyboard ...
    Your Spec-chum Your Spec-chum July 2018 Hardware
  • Grey +2 with lines on some games on RGB connectionHi Everyone, Is it OK if I ask a question? I dug my +2 out of the loft after far too many years about a month ago, and I have finally got it ba…

    ... />
    If possible, try another ULA chip to see if the ... my Spectrum running its original ULA chip on RGB, do you ... going for the unrain GAL fix as back in the day ... that old saying 'not to fix what isn't broke!'..
    AD-RS1600i AD-RS1600i May 2019 Hardware
  • Grey +2 with lines on some games on RGB connectionHi Everyone, Is it OK if I ask a question? I dug my +2 out of the loft after far too many years about a month ago, and I have finally got it ba…

    ... you have an original ULA (the large chip). ... internal circuitry in the ULA that generates the display ... think!) is the GAL fix was created to address ... effect) which the GAL fix prevents from happening.
    ... , likely generated by the ULA being 'out of comfort' ...
    AD-RS1600i AD-RS1600i May 2019 Hardware
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... confusing is this: when the ULA is not getting screen data ... answer many questions (if not fix the problem right away).
    Ast_A_Moore Ast_A_Moore September 2019 Hardware
  • Can someone run this test program on a real Spectrum 48K?I've knocked up a small test program just to satisfy my emulation OCD if someone with a real 48K Spectrum can spare a couple of minutes to run it.? …

    ... of emulation of the "processor + ULA" bundle. In your case, the ... . Whether it is necessary to fix it and whether they will ...
    azesmbog azesmbog November 2019 Emulators
  • LnxSpectrum - one of the best emulators?Anyone is using the LnxSpectrum? Supports DivIDE (master and slave, up to 1MB of memory), RTC, DMA (!), SAA and 2xAY, ULA+, K-Mouse, CPU up to 20 …

    ... am sure the author will fix border-timing issues later. However ... compatible type with the original ULA chip. (Do not confuse it ... with a different and strange ULA chip, which made a square ...
    SMc SMc February 2020 Emulators
  • Microdrive repair - GREAT NEWS!Microdrive repair facts: We know (almost) pure alcohol and cotton swabs are needed a lot to clean the Microdrive head. We know cartridges degrade, so…

    ... and I am trying to fix it.
    Error message is ... Q2 are ok.

    ULA is not hot, not even ...
    payty payty April 2020 Hardware
  • If Sinclair computers had not been sold...I was just having a random thought. If Sinclair Computers (or the rights to them, not sure how it 'worked' back then) had not been sold to Amstrad…

    ... bug’ ‘fix’. The ‘dead bug’ ‘fix’ was incorporated in later ULA chips, ... . The ‘dead bug’ ‘fix’ activated the memory contention logic ... Hence the ‘spider’ transistor ‘fix’. Issue 3 and later boards ... The 6C001 and subsequent ULA chips had more matrix cells ...
    1024MAK 1024MAK August 2020 Hardware
  • 128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…

    ... to be relatively trivial to fix. It looked like someone had ... . The variable capacitor near the ULA looks pretty to be in ... , without it becoming impractical to fix, I'll be happy :)
    cj7hawk cj7hawk March 2021 Hardware
  • 128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…

    ... socket... Also have a spare ULA and MUX chip too now ... my own toastrack. And maybe fix the membrane too....

    fix in the future. I also ...
    cj7hawk cj7hawk July 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... contention circuitry. They did not fix the fundamental problem.
    < ... . They did not fix the problem in the ULA. EVER!

    ULA design. Because the computers obviously ... not try to fix the problem in the ULA. It was lucky ...
    1024MAK 1024MAK August 2021 Hardware
  • Anybody got a parts list for an Issue 3b please?I've got a schematic, but does anyone have a parts list with the values just for the resistors and capacitors? Just would save me sometime going thro…

    ... the chips, even discounting the ULA, and getting hard to find ... /> David. [/quote]

    Yes ULA's are like gold dust ... I've brought spares to fix my other Spectrum's, although ... have a couple of spare ULA's, but I do have ...
    Your Spec-chum Your Spec-chum September 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... -pixel elements. Now you can fix the counter outputs to the ... have been done in a ULA at very low cost. Also ...
    cj7hawk cj7hawk October 2021 Hardware
  • Kempston problems in XPOK, I've been running ZX32 on Win98 for a year or so and using my Sidewinder Pro pads with games providing the Kempston joystick option. Everything …

    ... , how the hell do I fix it???
    Andy C Andy C February 2002 Emulators
  • PocketClive bugHi... thought I would give all of you that downloaded PocketClive, the PocketPC spectrum emuator a small bug report! There is a bug that prevents …

    ... a couple of days that fix this (and some other small ...
    Anders Anders October 2001 Emulators
  • Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…

    ... is slower because of the ULA)?

    Or must I ...
    Anders Anders September 2001 Emulators
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Latest Posts

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    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
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  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
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