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<1234567…34>
  • broken 48K, strange screenwell I finally socketed all lower 16K ram chips, (8 of them in a row near corner, not those 4 in two rows) and replaced them with new ones but it did…

    yes, its 3b, but it seems all others are 4a.

    this is written on 3b ULA:
    6C001E
    0243

    I'll give it a try.
    orange orange December 2010 Hardware
  • Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…

    ... issue [b]one[/b].
    ULA is 5C102E 8220
    CPU ... Rubber key
    Issue 3B
    ULA 6C001E-6 8335
    CPU ... Key
    Issue 3
    ULA 6C001E-6 8340
    CPU ...
    Spirantho Spirantho April 2011 Sinclair Miscellaneous
  • Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…

    ... : SRC121B 8406 1983 ISSUE 3B
    ula : FERRANTI ULA 6C001E-6
    rom ...
    stevebrowne stevebrowne April 2012 Sinclair Miscellaneous
  • No tea vicar on MB02Hello Folks, I have difficulties in getting "More tea vicar" (the free 128k version) running on the MB02. The game starts and you can choose control…

    ... about... a port clash between ULA+ and MB02?

    ... MB02+ and ULA+.
    ULA+ use ports #xx3B but port #3B is on ... real MB02+. Only reading from ULA+ ports is impossible (collision)
    3B(ula+ port) undefined value (can be ...
    velesoft velesoft December 2012 Sinclair Miscellaneous
  • No tea vicar on MB02Hello Folks, I have difficulties in getting "More tea vicar" (the free 128k version) running on the MB02. The game starts and you can choose control…

    ... MB02+ and ULA+.
    ULA+ use ports #xx3B but port #3B is on ... BIN 0xxxxx11. If software for ULA+ will use only writing to ... real MB02+. Only reading from ULA+ ports is impossible (collision)
    3B(ula+ port) undefined value (can be ...
    Speccyman Speccyman February 2013 Sinclair Miscellaneous
  • Tape loading problem with Issue 3BI have an Issue 3B 48k that doesn't seem to want to load any tapes. I have an MP3 player connected to the EAR socket. When I type LOAD "" and start p…

    I swapped the ULAs over and it turns out the ULA in my 3B is partially duff. :( With the Issue 2 ULA the 3B screen comes to life, when loading and the 2's screen stays blank with the 3B ULA.
    I suppose I have to start looking for a replacement.
    protek protek April 2014 Hardware
  • 48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…

    ... from e*ay an Issue 3b 48k , fitted in a + case ... characters. BUT I noticed that Ula is very hot and the ... for fetishism I added to Ula and Z80 two mini heatsinks ...
    Cignale Cignale July 2010 Hardware
  • ULA 1E7 in 3B board?Hi all. Any comments on the following would be appreciated. I have an issue 4a and an issue 3b Spectrum. While having a look around inside the 3b …

    ... inside the 3b I noticed it contains a 1E7 ULA. I ... it has the same model ULA.

    Having read ... which had the 7 ULA, whereas the 3b should have E6. ... I understand the 7 ULA may generate a clearer ... an improvement on an 3b with a ULA 6?

    ...
    Jim M Jim M September 2015 Hardware
  • 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…

    ... is the ULA the same from issue 3 to 3B?


    I have an issue 3b mainboard out of a + for ...
    MARKZX MARKZX July 2007 Hardware
  • Wanted: Rubber Key 48K M/board or ULAI have a spectrum that isn't too happy. It seems to be a problem with the ULA... So, has anyone got a spare working motherboard that'll fit in my ca…

    ... be a problem with the ULA...
    So, has anyone got ... my case, or a ULA for a 3b revision? I will happily ... .

    The current ULA has Ferranti ULA 6C001E-6 / 8351 stamped ...
    Jason9 Jason9 March 2011 Wanted
  • ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…

    ... /> The second is an issue 3b. I am willing to fiddle ... up at all, including the ULA. Im wondering if this is ...
    vinnivee vinnivee April 2011 Hardware
  • ULA Chips Wanted UrgentlyHello, I am looking for following ULA chips to repair my Speccies: Issue 2 board ULA5C112E 1 pc Issue 3B board ULA6C001E-6 or ULA6C001E-7 2 pc…

    ... /> I am looking for following ULA chips to repair my Speccies ... 3B board ULA6C001E-6 or ULA6C001E-7 2 pcs

    ULA ...
    ikci ikci June 2012 Wanted
  • 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…

    Another 3B I have here had a faulty ULA, swapped that out for ...
    Macc Macc February 2014 Hardware
  • Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …

    ... problems to have the correct ULA for that board.


    Issue 3 and 3B boards are designed for 6C001E ... Y signal coming from the ULA. 220R for 5C112E, 1K for ... 6C001E. The older ULA seems to be designed for ...
    rga24 rga24 April 2014 Hardware
  • Wanted Spectrum ULAI'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7. Thanks!

    I'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7.

    Thanks!
    protek protek April 2014 Wanted
  • ULA type and datecode listHere is a list of all known ULA datecodes with type, collated from various threads and the serial numbers list. For the 6C series ULAs without a -5, …

    ... a list of all known ULA datecodes with type, collated ... probably a replacement ULA.

    [CODE]DATE ULA ISSUE(s)< ... /> 8401 6C001E6 3B
    8402 6C001E6 3B
    8403 6C001E 3B
    8407 ... br /> 8418 6C001E7 3B,4A
    8426 6C001E7 3B
    8428 ...
    Jakeyw Jakeyw August 2014 Hardware
  • Fully refurbished ZX Spectrum 48K boards incl. ULA- Including ULA (version that [URL="http://www.bytedelight.com/?p=41"]corresponds to the board issue[/URL] - click to find out more about ULA version…

    - Including ULA (version that [URL="http://www. ... to find out more about ULA versions)
    - All new electrolytic ... />
    Board issues available: 3, 3B, 4A, 4B, 4S, 6A (no ...
    bverstee bverstee February 2015 Sales
  • Three Spectrum main boards (Issue Two, 3B and 4A)I will be offering three partially tested Spectrum main boards (Issue Two, 3B and 4A) on Ebay. All boot to the Sinclair (C) message. All fully popula…

    ... Spectrum main boards (Issue Two, 3B and 4A) on Ebay. All ... populated. Three different flavours of ULA.

    Ebay auction starts ...
    schombi schombi February 2015 Sales
  • Issue 3B woesHello there, I currently have a Issue 3B for repairs around, it used to have broken upper and lower RAM, which I replaced with 41256-120 DRAMs (hac…

    ... /> I currently have a Issue 3B for repairs around,
    it ... computer, issue persists when swapping ULA & CPU.

    Any ...
    Shockwav3 Shockwav3 November 2015 Hardware
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... system I have. with my 3b it didn't seem to ... . so could this be ula? but the ula seems fine in the ...
    cypher007 cypher007 December 2016 Hardware
  • Building a ZX Spectrum 3B, Looking for PartsAs the title says, I'm attempting to build a new ZX Spectrum, but I'm having some trouble locating all of the parts. Thus far, I've got all of t…

    ... ICs as well (including the ULA!).

    However, the coil ... when compared to my original 3B board that I've been ...
    DistantStar001 DistantStar001 March 2022 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
  • 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
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... a 48k Spectrum (issue 3B board) in a pretty ... see here is that ULA will no longer access ... can't just remove ULA from the circuit because ... possible to disable the ULA's video generation functionality ... you disconnect the oscillator from ULA?

    Also, ...
    Avian Avian May 2007 Hardware
<1234567…34>

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  • 48 Issue 3b working but very hot ula and cpuSalve to everybody<br /> I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good R…
  • ULA 1E7 in 3B board?Hi all.<br /> Any comments on the following would be appreciated. <br /> I have an issue 4a and an issue 3b Spectrum. While having a look around in…
  • 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…

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