World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.011s
<1234567…34>
  • 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 ... fault?

    Many thanks Mark
    MARKZX MARKZX July 2007 Hardware
  • IF1 Ula Questionim thinking about getting an interface 1 but im aware that there is/was an issue with the ula.My question is if i have the opportunity to buy one but…

    ... /was an issue with the ula.My question is if i ... has the melt mark or a deformity above the ula does this ... they still functional but the ula gets hot?can someone explain ...
    zedexspectrum zedexspectrum July 2014 Hardware
  • Spectrum Issue 2 - TR6 ReplacementI've just got my hands on an Issue 2 ZX Spectrum, that needed some repairs. The picture quality after doing a composite modification was pretty shodd…

    ... one of the legs on TR6 (the transistor that sits awkwardly ... up for me exactly what TR6 is doing. I Googled it ... addresses a problem with the ULA but nothing more specific.
    retrogamemart retrogamemart August 2014 Hardware
  • zx spectrum ULA upgradei have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be…

    i have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be used but should some resistor values be changed to match it ?
    thanks mark ..
    mark8bit mark8bit January 2021 Hardware
  • Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …

    ... design having already filled the ULA, the full use of all ... " factory mod to the ULA A14 and A15 inputs was ... , where an extra transistor (TR6) is soldered on top of ... production fitted on the PCB (TR6).

    Also there ... .

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK October 2012 Hardware
  • zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.

    Hi Mark

    You may be ... was implemented with the 5C112 ULA, which replaced the 5C102 which ... />
    [I][B]This improved ULA (5C112) has no spider modification ... IC1.

    Transistor mod : TR6 (ZTX313) connected as follows:
    Pierre Pierre October 2013 Hardware
  • zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.

    [QUOTE=Pierre;730455]Hi Mark

    You may be ... was implemented with the 5C112 ULA, which replaced the 5C102 ... />
    [I][B]This improved ULA (5C112) has no spider modification ... IC1.

    Transistor mod : TR6 (ZTX313) connected as follows:
    landex landex October 2013 Hardware
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... to be that the "spider" (TR6) is needed so that external ... ) are not affected by the ULA contention. I refer interested readers ... the "spider" / TR6 missing :D

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK December 2013 Hardware
  • Spectrum Issue 2 - TR6 ReplacementI've just got my hands on an Issue 2 ZX Spectrum, that needed some repairs. The picture quality after doing a composite modification was pretty shodd…

    ... address decoding in the ULA is incomplete. TR6 improves the decoding so ... that the ULA will work correctly ... -connector. If not fitted, the ULA will interrupt accesses to external ... series.

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK August 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... cause are maybe TR3 or TR6 (both ZTX313).

    ... the clock amp (between the ULA and the Z80 CPU). ... /> TR6 is the extra address decoding needed to stop the ULA from ... a bug in all Spectrum ULA's). Also test the ... print).

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK October 2014 Hardware
  • Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…

    ... work on the Z80 and TR6 you have just done, is ... .

    Next, unplug the ULA and the CPU. Now using ... A15).

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK December 2015 Hardware
  • Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…

    ... "), TR6 on the schematics, is only used to prevent the ULA from ... I/O ports that the ULA should be ignoring. If there ... any reason for the missing TR6 or the loose wire (if ... RAM

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK May 2017 Hardware
  • ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …

    ... in issue 2 boards is TR6. It's to correct a ... with the ULA. On issue 3 and later boards, TR6 is included ... problems.

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK July 2017 Hardware
  • ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …

    TR6 / Spider mod - see [url="https:// ... ] the ULA A0 address line.

    In summery, TR6 connects as ... circuit that connects to the ULA pin 33 and to edge ... .[/list]

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK July 2017 Hardware
  • ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…

    ... rails are within specification.
    TR6 is not critical (machine will ... video circuit).

    IC1 (ULA) is at least partly working ... colours.

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK August 2017 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…

    ... fix’ was incorporated in later ULA chips, but the original ... boards incorporated this transistor (TR6) on the PCB as ... The 6C001 and subsequent ULA chips had more matrix cells ... had ‘tidied up’ the ULA I/O address decoding ( ... />
    [b][i]Mark[/i][/b]
    1024MAK 1024MAK August 2020 Hardware
  • doubt about swapping ULA in an issue 2 boardIs it possible to swap a 6C001E-6 ULA type with a 5C112E ? I have this issue 2 board that is not booting, it shows me a black border with horizont…

    ... putting an earlier version ULA in a later board may ... design limitation present in all ULA versions. It is commonly ... position on the board as TR6.

    Note that ... machine will still work if TR6 / the spider mod. is ... ].

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK September 2020 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
  • Mark R JonesI would like to be the first to welcome Mark to our humble little community, it's always good to have a bonafide Spectrum man here, whilst we are mos…

    ... be the first to welcome Mark to our humble little community ... are mostly amateur Spectrum euthusiasts Mark is your real mcCoy Spectrum ...
    rich_chandler rich_chandler February 2005 Sinclair Miscellaneous
  • 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
  • TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…

    ... to the left of the ULA chip (tr6/7 ???? i don't ...
    gtsamour gtsamour March 2007 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
  • Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…

    ... IN?R (Philip Kendall; thanks, Mark Woodmass)
    [*] Fix undocumented flags ... active, as the +2A/+3 ULA applies contention only when MREQ ...
    Fred Fred July 2007 Emulators
  • Mark WilkinsonHere's something for all you Fish/Marillion fans out there. Mark Wilkinson, who designed the artwork for the early Marillion albums along with all of…

    ... Fish/Marillion fans out there. Mark Wilkinson, who designed the artwork ...
    Ian Hamilton Ian Hamilton August 2007 Sinclair Miscellaneous
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
tr6 104 152
ula 7.3K 13K
mark 13.6K 14.8K

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 …
  • Mark R JonesI would like to be the first to welcome Mark to our humble little community, it's always good to have a bonafide Spectrum man here, whilst we are mos…
  • Where is the MIA Toki Mr. Mark R Jones?;)<br /> <br /> Any ideas?
  • 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…

Related Searches

  • 3b ula
  • issue 3b ula
  • harlequin modified ula
  • ula model 2
  • ula
  • zx 2 ula
  • zx 2 ula interchange
  • zx 2 ula swap
  • grey 2 ula swap
  • ula 128
  • ula replacement
  • mark rivers
  • 2b dead ula
  • black 2 dead ula
  • slam ula
  • wip ula
  • ula replacement module
  • a15 ula
  • tr6 ula
  • mark smith ula

Copyright © 2024 World of Spectrum