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<1…10111213141516…34>
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    How long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
    Philip Kendall Philip Kendall February 2005 Development
  • Sinclair light Gun ?Just wondering if the Sinclair light gun that came with the +2 & +3 models would work on a Spectrum 128k+ (heatsink model)? And also what port did it…

    ... work on a Spectrum 128k+ (heatsink model)?
    And also what ...
    thomas3120 thomas3120 March 2005 Sinclair Miscellaneous
  • How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…

    ... change the fact that the ULA must access the video memory ...
    AE.Vasconcelos AE.Vasconcelos April 2005 Development
  • Spectrum 128kHi everyone, As a long time Speccy fan weaned on the original +2 machine (hence the username!), I'm thinking about finally buying a genuine Sinclair…

    ... on eBay without the distinctive heatsink (basically they look like the ... has someone just unscrewed the heatsink - and more importantly, will the ...
    greycase greycase May 2005 Sinclair Miscellaneous
  • +2A ProblemHi ! I just got a +2A and it has a powerup problem. When I turn it on it just displays 1987 1987 over the first few lines and a random attributes p…

    ... the screen. It seems the ULA and Z80 are fine (picture ...
    Tom-Cat Tom-Cat May 2005 Sinclair Miscellaneous
  • Dead Speccies and IF1 ULAsLooking for dead Spectrums to repair (I'll even give them back working if you ask [I]really[/I] nicely - and you pay for 'em :) ). Also I have Interf…

    ... 1s that need a new ULA so if anybody has any ...
    Spirantho Spirantho June 2005 Wanted
  • Opus Discovery 1Does this beauty work with the 128K spectrum? (The black one with the external heatsink) Cheers.

    Does this beauty work with the 128K spectrum? (The black one with the external heatsink)
    Cheers.
    dekh dekh July 2005 Sinclair Miscellaneous
  • Boxed Spectrum 128K for saleHi fellow speccy fans, I'm planning to sell some of my speccy gear in the near future. The first item for sale is a boxed spectrum 128K (The one wi…

    ... 128K (The one with the heatsink) It is in good working ...
    AndersJensen AndersJensen July 2005 Sales
  • nec780 vs z80aHi everyone! Got a 48k issue 2 board with nec780 with a mts2369 at its back.(spider?) Between pin 11 of the cpu and pin 14 of ic 23 theres a resis…

    ... half. (i have changed the ula for a known working one ...
    odious odious September 2005 Sinclair Miscellaneous
  • ZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…

    ... OK too. All traces to ULA and edge connector are OK ... than any others), only the ULA run hotter. But thats normal ...
    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
  • 128k scartIs it possible to buy a scart lead for the 128k(heatsink version)off the shelf ?? I'm on a mission to improve the picture on my spectrum128k... am i…

    ... scart lead for the 128k(heatsink version)off the shelf ??
    stunik101 stunik101 September 2005 Sinclair Miscellaneous
  • 128K (Heatsink) Power SupplyHas anyone got a spare one?

    Has anyone got a spare one?
    Ian Hamilton Ian Hamilton September 2005 Wanted
  • Spectrum 128k(Heatsink)Hi A friend of mine picked up a spectrum+ 128k at a carboot sale at the weekend The thing is it did not come with a power pack Reading from anoth…

    Hi

    A friend of mine picked up a spectrum+ 128k at a carboot sale at the weekend

    The thing is it did not come with a power pack

    Reading from another post says the power pack for a 128k is 9v 1.85a

    I have ...
    Kano156 Kano156 October 2005 Sinclair Miscellaneous
  • Top TipsA 128K spectrum heatsink makes a useful storage utility for 7" vinyl records, and has the added advantage in that it keeps them warm, and less suscep…

    A 128K spectrum heatsink makes a useful storage utility for 7" vinyl records, and has the added advantage in that it keeps them warm, and less susceptible to frost damage.
    chaosmongers chaosmongers October 2005 Sinclair Miscellaneous
  • Z80 cycle contentionHi, Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle? I mean which Z80 clock cycle, T1 or T2? Thanks..

    Hi,
    Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle?
    I mean which Z80 clock cycle, T1 or T2?

    Thanks..
    Mp Mp November 2005 Hardware
  • AMD vs IntelJust to show you what happens on CPU's when you remove the heatsink while the machine is on......... [url="http://videos.timekiller.com/index~show~m…

    ... 's when you remove the heatsink while the machine is on ...
    Hedegaard Hedegaard December 2005 Chit chat
  • oh man just about to build Athlon 64 and need some questions answered heeelpI've bought a AMD ( venice )Athlon 64 3200 it came with the AMD heatsink fan on the bottom of the fan is a bluey grey square patch. am i right in thi…

    ... it came with the AMD heatsink fan on the bottom of ...
    swordheart swordheart December 2005 Chit chat
  • top tip number 9Keep your 128K Spectrum keyboard free of crumbs by not keeping your crumpets in the heatsink at the side. Avoid getting a greasy keyboard by not but…

    Keep your 128K Spectrum keyboard free of crumbs by not keeping your crumpets in the heatsink at the side.

    Avoid getting a greasy keyboard by not buttering the said Crumpets.
    chaosmongers chaosmongers January 2006 Chit chat
  • When is a clone not a clone?If a Spectrum is built from scratch, using new components where available, is it a clone, copy or something else? See, I won an unpopulated Spectrum…

    ... PCF 1306P IC, LM1889 IC, ULA IC, the loudspeaker and the ...
    DEATH DEATH May 2006 Hardware
  • Faulty 128KI digged out my Spectrum 128, and it wakes not up. I don't have experience, only with 48K. Maybe someone can give me some hint, clue. It looks like m…

    ... /> It looks like memory (or ULA, CPU, memory control logic) error ... worth to replace RAM chips? ULA is warm (probably normal), but ...
    piters piters June 2006 Hardware
  • Burner The Revenge - So Cool!I have recently bought an Xbox 360 to go with my XBox, and two speccys(a 48k rubber keys and a 128+ (heatsink version) I bought the console from HMV…

    ... rubber keys and a 128+ (heatsink version)

    I bought ...
    DodgyGeezer DodgyGeezer July 2006 Games
  • 128K (heatsink) or +2 greylooking for one of these due to being unable to play 128K games on my 48K :) just in emu :( anyone has functioning and cheap one around ireland? (th…

    looking for one of these due to being unable to play 128K games on my 48K :) just in emu :(

    anyone has functioning and cheap one around ireland? (there?s a mate who could pick it up for me)
    it would also lower the postage costs if I?ll ...
    de Vandemar Croup de Vandemar Croup July 2006 Wanted
  • Did all Spectrum 128Ks have that large heatsink?Question as per title. I can't seem to find the answer to this. I'm sure I've seen a picture of one without it. Would this be because someone has car…

    Question as per title. I can't seem to find the answer to this. I'm sure I've seen a picture of one without it. Would this be because someone has carried out a voltage regulator mod in order to do away with the need for it?
    patters patters September 2006 Hardware
  • Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…

    ... 's the advantage (mistery?) behind ULA's spectrum screen memory interpretation ...
    Arda Arda October 2006 Development
  • Rubber keyed 128KCheck this out: First we had a grey +3, then we had a 128K with no heatsink. But now we have an original rubberkeyed 128K. [url]http://cgi.ebay.co.…

    ... had a 128K with no heatsink.

    But now we ...
    BruceNorton BruceNorton October 2006 Hardware
  • Games that use multicolour effectsMulticolour (which created via ula timing, not screen switching) is the only functional effect that ULA can do. It's the only way to break colour cla…

    Multicolour (which created via ula timing, not screen switching) is ... the only functional effect that ULA can do. It's the ...
    Arda Arda October 2006 Games
  • Cooking with the XBox 360[url]http://games.slashdot.org/games/06/11/03/0515209.shtml[/url] "Someone by the name of "Brett" went all out to prove how hot the XBox 360 can rea…

    ... really get. So hot, the heatsink boils water on contact, but ...
    Daren Daren November 2006 Chit chat
  • Multiface 128 problemHello everyone i have a 48k plus speccy which i firstly thought was working perfectly. It passed all the test of the official Sinclair test tape (cpu…

    ... Sinclair test tape (cpu, rom, ula, ram) so i thought it ...
    gtsamour gtsamour November 2006 Hardware
  • Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …

    ... socketed ICs (except for the ULA in the issue 2 Spectrum ...
    Winston Winston November 2006 Hardware
  • 128 won't loadI been trying to load a 128k speccy programme ( the fantasy one that came with the speccy 128 ) into a 128k heatsink speccy but it gets so far and th…

    ... speccy 128 ) into a 128k heatsink speccy but it gets so ...
    swordheart swordheart November 2006 Sinclair Miscellaneous
<1…10111213141516…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
ula 7.3K 13K
heatsink 1.2K 1.7K

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