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<1234567…34>
  • ahem!.. could I have a minute of everyones time please :)ok... here's the thing. I'm looking into sourcing some spare IC's for the whole range of Spectrums - mainly memory, as that's probably the weakest l…

    ... the ULA, are the most common fault older speccies develop - memory faults ... ' to the occasional game crash. ULA faults again can be a total ... renewing the RAM and/or ULA, the chances are that provided ...
    GP GP February 2003 Sinclair Miscellaneous
  • Internal amp and signal cleaner for tape inHello! Is there known to work INTERNAL schematic which cleans signal from tape in and amplifies it. I need such thing so i can load from my smartpho…

    ... know exact properties of a typical ULA's tape I/O pin ... speaker is connected to the ULA tape I/O pin.
    RetroTechie RetroTechie July 2012 Hardware
  • ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…

    Oh, I should say that until a ROM based RAM tester has been used to clear the DRAM chips of guilt, we should keep an open mind, as strange ULA faults, strange Z80 CPU faults etc are also possible.
    1024MAK 1024MAK January 2017 Hardware
  • New colors / switchable color palette with regular ULA ?Hello. This may be an ignorant question but I just thought about it today and wanted to post it here to get some opinions. OK, so, today, while goin…

    ... looked weird. Yellowish white, etc. Typical old issue1/issue2 video symptoms ... question are handled by the ULA.

    Any comments? :D
    memrah memrah November 2012 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 …

    ... tried another 6C001E-7 ULA, taken from a working ... perfectly when fitted with the ULA from ZX285.
    < ... long as a Spectrum ULA is not faulty, ... D8 in-circuit: no faults apparent.
    - Tested ... Tested TR6 in-circuit: no faults apparent.
    - Lifted one ...
    Zorn Zorn February 2016 Hardware
  • 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…

    ... missing on the emitter. The ULA was also getting hotter than ... resort I tried swapping the ULA with a known working one ... /> I'm thinking with the faults being intermittent and I keep ...
    Your Spec-chum Your Spec-chum July 2018 Hardware
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …

    ... if my ULA's Y, U and V are typical:
    ... book "The ZX Spectrum ULA: How to design a ... interested in knowing the typical voltage of the composite ... Patrick

    My ULA Y output:
    [img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
    ...
    paf paf November 2018 Hardware
  • Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…

    ... can be faulty, or the ULA. Anyway not looking for a ... wondering if you check for faults in any particular order?[/quote ... , then that would indicate a typical fault with 1 or more ...
    Your Spec-chum Your Spec-chum August 2019 Hardware
  • WANTED: 128k+ or 128k +2(early grey mod.) ULA chipHello, Attempting to repair my 128k+ speccy. Needs a ULA(IC1)chip from either a 128k+ or an early +2 will work also. If anyone has this chip or has a…

    ... 128k+ speccy.
    Needs a ULA(IC1)chip from either a ... 's broken(other than the ULA), please give me a shout ...
    thomas3120 thomas3120 January 2003 Wanted
  • Spectrum spares / repair jobsI recently bought a few faulty Spectrum 48+'s and have built a fully functional unit from the best bits of them, however this has left me with two pa…

    ... work fine albeit with slight faults, one has a dodgy power ... repaired or dismantled for replacement ULA / RAM chips to repair other ...
    BuzzinRich BuzzinRich November 2003 Sales
  • ULA schematicsHi everyone. Some while ago I remember getting hold of some circuit schematics of the innards of the Speccy 48K ULA. Sadly I've since lost the files…

    ... innards of the Speccy 48K ULA. Sadly I've since lost ...
    Laser Laser August 2005 Sinclair Miscellaneous
  • ULA?Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?

    Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?
    cg cg November 2005 Hardware
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... is controlled.

    The ULA controls output to the the ... need to change the ROM,ULA and add more RAM ?? or ...
    Saboteur Saboteur November 2005 Hardware
  • sound input causing dead ula in +2 ?I have a dead +2a (it shows static black screen, no border see: [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=9619&forum=4)"]http:/…

    ... /> I started to think why ula suddenly broke. 'Deadth' posted ... connected tape leads can damage ula.

    Also found ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9"]http ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9[/ ...
    Timppa Timppa November 2005 Hardware
  • ULA......Woooooo and ULA 160??'ello all from down under ! they don't know the speccy well this way it seems, anyways, picked up my brand new astra yesterday, and it's got some …

    ... plates on it

    ULA 160

    i'm ...
    bleugh bleugh November 2006 Sinclair Miscellaneous
  • ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank

    Hi.

    Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?
    Also looking for one 7805 heatsink...

    Thank
    Gods Gods May 2007 Wanted
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    I remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board.
    It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ?

    Thanks.
    Gods Gods June 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... want to know is the ULA the same from issue 3 ...
    MARKZX MARKZX July 2007 Hardware
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... and CAS generated from ULA? I think there may ... Ramsoft incorrectly states that ULA doesn't stop CPU ... [LIST=1]
    [*]The ULA address drivers do not open ... I'm curious what exactly ULA is doing then.
    ... reading from it by ULA. The address while bytefetch ...
    brian-82 brian-82 November 2007 Development
  • Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…

    Is there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is causing the problem.

    Is there anyone who can help?
    georgedb georgedb December 2007 Hardware
  • Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…

    ... gang..
    The Speccy 48 ULA Replacement is *almost* here ;)

    Anyway, the machine with ULA replacement doesn't quite boot ...
    csmith csmith April 2008 Hardware
  • ULA Book - Target Audience?This is probably of most intrerest to hardware chaps, but a greater community input would be good. I've been turning all my ULA analysis into a love…

    ... been turning all my ULA analysis into a lovely ... "The Sinclair ZX Spectrum ULA". I'm doing this ... time as creating a complete ULA replacement, so effort is ... features of the machine the ULA encapsulates.
    Do I ... the specifics of the ULA internals, it's going ...
    csmith csmith May 2008 Sinclair Miscellaneous
  • 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…

    ... as well as a replacement ULA for an issue 3 ZX ... Spectrum (Ferranti ULA from memory). Can anyone help ...
    gizmomelb gizmomelb May 2008 Wanted
  • ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …

    ... we have [B]a working ULA replacement[/B] !!

    The ...
    csmith csmith May 2008 Hardware
  • Inside the ULAI've recently updated my Blog with the news that I've managed to get inside a 6C001E ULA and have got close up images of the die. I'm currently back-…

    ... to get inside a 6C001E ULA and have got close up ...
    csmith csmith December 2008 Hardware
  • Spectrum ULA Book AnnouncementFurther to getting inside the ULA, I've turned my ramblings and lab book into a more professional book that you can all own! I'm putting a lot of ef…

    Further to getting inside the ULA, I've turned my ramblings ...
    csmith csmith December 2008 Hardware
  • ZX81 ULA 2C210E wantedHello, I'm in need of a working 2C210E (not the earlier 2C184E) ULA chip used on zx81s and Timex1000s. These were sold on ebay for 9 quid each some …

    ... 2C210E (not the earlier 2C184E) ULA chip used on zx81s and ...
    gtsamour gtsamour January 2009 Wanted
  • 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 …

    ... perfectly if I cooled the ULA (with cooling spray). The first ... measuring the signals of the ULA I found out that the ... the RAS pin of the ULA. Finally I placed a 180pF ... ) even if I heated the ULA with a hair dryer.
    ingo ingo January 2009 Hardware
  • ULA gets so hot, it is cracked open!Hi everyone. I have bought a rubber-keyed 48K and the seller said he was selling it as "for spares/repair." Sure enough, it turns out it doesn't work…

    ... took it apart suspecting the ULA was dead. It turned ... I immediately noticed that the ULA had a crack in the ... this time and the ULA started to get so ... gut feeling that replacing the ULA wouldn't fix the ...
    What might make an ULA get sooo hot that it ...
    memrah memrah March 2009 Hardware
<1234567…34>

Latest Posts

  • I am currently watching.....
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    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
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    mel the bell on April 21
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    harriusherbartio on April 21
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    harriusherbartio on April 21
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    mel the bell on April 20

HitBox

Word Docs Hits
typical 2.1K 2.2K
ula 7.3K 13K
faults 719 811

Related Threads

  • ULA......Woooooo and ULA 160??'ello all from down under !<br /> <br /> they don't know the speccy well this way it seems, <br /> <br /> anyways, picked up my brand new astra yeste…
  • Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…
  • Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…
  • WANTED: 128k+ or 128k +2(early grey mod.) ULA chipHello,<br /> Attempting to repair my 128k+ speccy.<br /> Needs a ULA(IC1)chip from either a 128k+ or an early +2 will work also.<br /> If anyone has …
  • ULA schematicsHi everyone.<br /> <br /> Some while ago I remember getting hold of some circuit schematics of the innards of the Speccy 48K ULA. Sadly I've since lo…
  • ULA?Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?
  • The ULA and ScreenI've asked something similar before but please bear with me.<br /> <br /> I'm trying to understand the way the screen is controlled.<br /> <br /> The…
  • sound input causing dead ula in +2 ?I have a dead +2a (it shows static black screen, no border see: [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=9619&amp;forum=4)"]ht…
  • Typical...Plusnet's mail-server gets overtaken by second-class post, so I redirect all my important email to my Gmail account.<br /> <br /> Now Gmail goes down…
  • ULA chipHi.<br /> <br /> Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?<br /> Also looking for one 7805 heatsink...<br /> <br /> Thank

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