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<1234567…34>
  • Can anyone test my Issue 2 ULA?Hi guys, Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have…

    Hi guys,

    Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have a faulty ULA or not before trying to source one from somewhere.
    kamilb1998 kamilb1998 February 2012 Hardware
  • Another spectrum saved! (almost)I'm feeling rather chuffed* I just mended my spectrum+ unfortunately several keys were dead, and on opening the keyboard up one of the membrane tails…

    ... was replace a single chip - faulty ULA
    guesser guesser July 2007 Hardware
  • 128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …

    ... with A7=0 prevents the ULA from responding, so freeing all ... also high, ie, if the ULA is not being selected with ... high to doubly ensure the ULA is not selected. A working ... =0, and IORQGE=0. A faulty ULA responds when IORQGE=0, ignoring ...
    Jonathan Harston Jonathan Harston November 2007 Hardware
  • Issue 3B suddenly goes black and whiteAnother 3B I have here had a faulty ULA, swapped that out for another and hurrah! Works! New keyboard membrane and composite mod later I load a game…

    ... I have here had a faulty ULA, swapped that out for another ...
    Macc Macc February 2014 Hardware
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... Keyboard membrane, or IC1 (the ULA chip).

    ... what the signs of a faulty ULA chip are. Are there ... see if the chip is faulty?

    Also ... cannot remember exactly what ULA is on the board ... for a certain model ULA.) Tomorrow I will check ...
    CornishManicMiner CornishManicMiner March 2014 Hardware
  • Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…

    ... else).

    I swapped ULA's (5C112E) with another, working ... think that was for a faulty ULA. The mini-PCB is there ... . The 2 wires to the ULA are not connected. I'd ...
    georgedb georgedb September 2016 Hardware
  • Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.

    faults like that are usually ULA related - RAM faults almost always ... 's very very rare a faulty ULA will make no 'picture' at ...
    GP GP November 2003 Sinclair Miscellaneous
  • Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.

    ... /> faults like that are usually ULA related - RAM faults almost always ... 's very very rare a faulty ULA will make no 'picture' at ... is that it is a ULA related problem...? Is that something ...
    Bergman Bergman November 2003 Sinclair Miscellaneous
  • OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …

    ... the -5v supply, faulty 4116 RAM (lower 16k), faulty ULA, faulty upper RAM (4532 ... 32k) and faulty CPU.

    faulty ULA.

    don't bin ...
    GP GP March 2004 Sinclair Miscellaneous
  • Ecstasy & AgonyWhile checking out the area around Chennai Central station on Sunday, I came across this crowded narrow road taken up entirely by roadside vendors se…

    ... is not limited to a faulty ULA or ROM?

    Will ...
    Arjun Arjun March 2004 Sinclair Miscellaneous
  • Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…

    ... the nightmarish predictions of a faulty ULA chip and in the end ...
    Womble Womble September 2006 Hardware
  • Spectrum Composite video connections?Is it possible to modify a standard 48K spectrum to give composite video output? In my experience i have found the quality of the picture out of the…

    ... the case, this could mean faulty ULA chip (ferranti socketed chip, IC1 ...
    gtsamour gtsamour November 2006 Hardware
  • Spectrum Composite video connections?Is it possible to modify a standard 48K spectrum to give composite video output? In my experience i have found the quality of the picture out of the…

    ... the case, this could mean faulty ULA chip (ferranti socketed chip, IC1 ... board since there's some ULA timing issue that was (apparently ... and not bother replacing the ULA, which you'll only get ...
    DEATH DEATH November 2006 Hardware
  • Spectrum Composite video connections?Is it possible to modify a standard 48K spectrum to give composite video output? In my experience i have found the quality of the picture out of the…

    ... is a symptom of a faulty ULA chip that causes the paper ...
    gtsamour gtsamour November 2006 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... was present). It was tha ULA afterall, changed it and it ... would say its definitely a faulty ULA.
    gtsamour gtsamour October 2008 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... border. The cause is a faulty ULA chip

    Also:
    faulty ULA chip – these are usually available ... around (the notch on the ULA chip goes towards the back ...
    Nonsense in BASIC Nonsense in BASIC October 2008 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    ... how could this be a faulty ULA. Mine has a 2C183E 8236 ...
    gtsamour gtsamour January 2009 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    Maybe, but consider that ULA is also responsible for key ... it could be just a faulty ULA "pressing keys" when its overheated ... would say its definitely the ULA.
    gtsamour gtsamour January 2009 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... 329876]Maybe, but consider that ULA is also responsible for key ... it could be just a faulty ULA "pressing keys" when its ... this. Once keys become sticky/faulty:
    [list]
    [*]document ... rather than a dodgy ULA chip. The ULA gets quite warm anyway ...
    BloodBaz BloodBaz January 2009 Hardware
  • The Sadness of my Decaying Speccies.I've been avidly collecting ZX Spectrums since the late 90's and whilst at the time of the late 90's and early millennium my Spectrums and associated…

    ... ], about a +3 with a faulty ULA... which fortunately, was "fixed" (well ...
    mcleod_ideafix mcleod_ideafix September 2010 Sinclair Miscellaneous
  • The Sadness of my Decaying Speccies.I've been avidly collecting ZX Spectrums since the late 90's and whilst at the time of the late 90's and early millennium my Spectrums and associated…

    ... ], about a +3 with a faulty ULA... which fortunately, was "fixed" (well ...
    Winston Winston September 2010 Sinclair Miscellaneous
  • Broken +3I have noticed that some members on this forum prefer to repair Spectrums instead of just buying another one from ebay. I would like mine fixed at so…

    ... either a faulty Z80, or a faulty ROM B, or... a faulty ULA. You ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • 48k rubber key screen corruption[IMG][URL=http://img195.imageshack.us/i/img7398g.jpg/][IMG]http://img195.imageshack.us/img195/5563/img7398g.th.jpg[/IMG][/URL] Uploaded with [URL=htt…

    ... at least I know the ULA is ok.[/QUOTE]
    ... put a [I]known working ULA[/I] into this machine ... I]likely[/I] not a faulty ULA' (and it's always possible ... put [I]this[/I] ULA into a known working Spectrum ... ]would[/I] be a dead ULA, right? :???:

    Hint ...
    RetroTechie RetroTechie December 2010 Hardware
  • Composite spectrum problemHowdy, Found an old rubber key in a bag full of games recently which had seen better days. Rigged it up and to my suprise it worked! It needed som…

    ... thought it might be a faulty ULA, I have a few spectrums ... your result.
    Changing the ULA back again, this cleared those ... results, but I think your ULA is perhaps not feeling quite ... around? Can you change the ULA and write your results?
    Hedegaard Hedegaard July 2011 Sinclair Miscellaneous
  • Problem with MicrodrivesI know most of the my microdrives are still readable as 90% of the stuff on them was recovered but when I try and load them in the drive I have it ju…

    ... turned out to be a faulty ULA in the Interface 1. The ...
    Jimbob-Squarepants Jimbob-Squarepants October 2011 Hardware
  • Manic Miner ZX81Hi Guys, Can anyone explain why [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0017539]Manic Miner ZX81[/url] is not able to reproduce the ex…

    ... the above picture has a faulty ULA and I have to increase ...
    mcleod_ideafix mcleod_ideafix March 2012 Sinclair Miscellaneous
  • ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…

    ... internal power supply section is faulty, or the Z80 CPU is ... . Less likely, is a faulty ULA (if the ULA is toast, this writes ...
    1024MAK 1024MAK November 2012 Hardware
  • ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…

    ... internal power supply section is faulty, or the Z80 CPU is ... . Less likely, is a faulty ULA (if the ULA is toast, this writes ...
    Drbabbers Drbabbers November 2012 Hardware
  • Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…

    ... 3 machines have the weakest ULA I've found. Based ... experience, 48K and 128K ULA are robust chips. They ... Spectrums and a dead ULA is a rare failure. ... when they fail, the ULA is a plausible candidate. The ... +3 computer has a faulty ULA with ROMOE2 shorted. I' ...
    mcleod_ideafix mcleod_ideafix March 2013 Hardware
  • Faulty 48kHi all, Been a long time since my last vist to the site. I have an issue with a 48k I just picked up. When I type load "" and hit enter nothing hap…

    ... a second non working 48k (faulty ULA chip I think) is it ... worth me swapping the ULA chips over and try to ...
    Rocky1980 Rocky1980 April 2013 Hardware
<1234567…34>

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