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<1…9101112131415…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…

    ... (with a nod to the ULA as well), 4116, 4532, 41464 ...
    GP GP February 2003 Sinclair Miscellaneous
  • Why are Heatsink Spectrums soo Rare ?is it a case of quanity ? if so how many did they make. In fact, i would love to know how many rubber 16k, rubber 48k, +`s, +2`s etc... where made, d…

    is it a case of quanity ? if so how many did they make. In fact, i would love to know how many rubber 16k, rubber 48k, +`s, +2`s etc... where made, does anybody know this ?

    Thanks for your knowledge.
    spectaboy spectaboy March 2003 Sinclair Miscellaneous
  • Another Spectrum +2 Fault (actually two of them :-)Just picked up a couple of +2s from a boot sale - both *much* better condition than my one - obviously had far less use ;) One was sold as fully wor…

    ... long chip with a silver heatsink attached was hanging out of ...
    trellis trellis May 2003 Sinclair Miscellaneous
  • Wanted!Speccy 128 heatsink model box and instuctions.In decent nick and with all pollys. I have the compo in mint with all cables and psu just need box to make it complete. Sensible offers will be taken…

    In decent nick and with all pollys.
    I have the compo in mint with all cables and psu just need box to make it complete.
    Sensible offers will be taken into consideration.


    Thanks.
    beckite beckite September 2003 Wanted
  • Free Spectrum/Interface 1/Microdrive etc.I have the following items:- Spectrum 128K (heatsink model) 14" RGB Monitor Interface 1 (x2) Microdrive Multiface 128 20 Microdrive cartridges Compe…

    ... items:-

    Spectrum 128K (heatsink model)
    14" RGB Monitor ...
    Zynaps Zynaps October 2003 Sales
  • 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…

    ... repaired or dismantled for replacement ULA / RAM chips to repair other ...
    BuzzinRich BuzzinRich November 2003 Sales
  • Whats wrong with my 128k?The little power converter (the thing with three legs) that sits on the cooling fin was broken, so I bought a new power converter and replaced it. Bu…

    ... are not having a broken ULA.

    Well, I dont ...
    cs060mk2 cs060mk2 November 2003 Sinclair Miscellaneous
  • Best place for MembranesIm new so excuse my ignorance. I need 4 membranes for 3 for spectrum + and 1 for 128 heatsink (i think they are the same) Where is the cheapest sup…

    Im new so excuse my ignorance. I need 4 membranes for 3 for spectrum + and 1 for 128 heatsink (i think they are the same) Where is the cheapest supplier online ?
    Fazz Fazz February 2004 Wanted
  • Rarest Spectrum ?no, not the heatsink one ;) - I'm talking about the very first Issue 1s. look at the picture on a rubber key spectrum box - that's an Issue 1, with …

    no, not the heatsink one ;) - I'm talking about ...
    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…

    ... fried eh? Or perhaps the ULA? Somebody please tell me that ... were to replace the ROM/ULA and they would work I ...
    Arjun Arjun March 2004 Sinclair Miscellaneous
  • Multiface 128 and floppy drive questionHi, promise, my last question......... Been searching around for info, with no luck. With a multiface 128, can you attach a 3.5 inch floppy disk dri…

    ... multiface?
    (I have a heatsink speccy 128)
    Any help ...
    mikey303 mikey303 April 2004 Sinclair Miscellaneous
  • ANN: Spectaculator 6.2[NEW]: Spectaculator 6.2 Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emul…

    ... last few quirks of the ULA in these models. All
    Jon Needle Jon Needle May 2004 Emulators
  • Spectrum 128k+ for saleHi, I have an excellent condition Spectrum 128k+ (heatsink type) that has been totally reconditioned. -New capacitors, AY sound chip, Z80 cpu, membra…

    ... an excellent condition Spectrum 128k+ (heatsink type) that has been totally ...
    thomas3120 thomas3120 May 2004 Sales
  • No TV/composite picture on Spectrum 128KI have a heatsink-type Spectrum 128 that doesn't produce a picture any more, neither on the TV nor on the composite port. Apart from that, it seems t…

    I have a heatsink-type Spectrum 128 that doesn' ...
    J?rg Pleumann J?rg Pleumann May 2004 Sinclair Miscellaneous
  • Pentagon interface news from VELESOFTIt's from Xagon's board. It is about new interface for Speccy - it make Your comp compatible with Pentagon (and not only) and also it gives You up t…

    ... speed up all 128k pages (ULA doesn't slow down
    Yerz Yerz June 2004 Sinclair Miscellaneous
  • Spectrum repairsHello, does anybody here have experience with repairing defunct Spectrums? I have several of them at home, mostly 48K ones collected over time from …

    ... symptoms of faulty memory or ULA ICs? Which ones are likely ...
    J?rg Pleumann J?rg Pleumann June 2004 Sinclair Miscellaneous
  • Broken keyboard?Maybe long time ago discovered (o; Just found that if the keyboard isn't working anymore but the key foil itself is intact you need to cut of the 5 …

    ... after long time usage internal ULA pull-ups take over (o ...
    klingler klingler July 2004 Sinclair Miscellaneous
  • Crappy composite/TV signal on grey +2 machineI got a grey +2 machine from eBay a couple of days ago. It's working fine, but both the TV signal and the composite signal taken from the monitor con…

    ... , instable and contains interferences. A heatsink-type 128K machine with the ...
    J?rg Pleumann J?rg Pleumann July 2004 Sinclair Miscellaneous
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... * How long does the 48K ULA hold /INT low?
    * ... this is generated by the ULA every 69888 tstates, which ... When an interrupt occurs, the ULA pulls the /INT pin ... routine finishes before the ULA has pulled /INT high ... finished just as the ULA pulled /INT low, ...
    Philip Kendall Philip Kendall July 2004 Development
  • ScanlinesHere's an excerpt from the FAQ: [quote] Now for the timings of each line itself: define a screen line to start with 256 screen pixels, then border, …

    ... the CRT, so if the ULA is reading bytes it does ...
    GOC GOC July 2004 Development
  • Strange layout of Spectrum video memoryHello, does anyone have an idea why the Spectrum's video memory has such a strange layout? I understand that a resolution of 256x192 is an easy mean…

    ... the inner workings of the ULA can comment on this.
    J?rg Pleumann J?rg Pleumann August 2004 Sinclair Miscellaneous
  • Replacement chipsAfter much digging around on here, it seems to be the general consensus that the ULA could be causing the problems im having (spectrum is deaf to the…

    ... the general consensus that the ULA could be causing the problems ... i could get a replacement ULA chip please? :)

    Thanks ...
    johnneh johnneh August 2004 Sinclair Miscellaneous
  • Grundy Newbrain partsI have some untested spare Newbrain parts which are now surplus to requirements and am looking to either sell them or trade them for other unusual vi…

    ... - motherboard and ROM, keyboard, case, heatsink

    Picture: [url="http ...
    andrew1810 andrew1810 September 2004 Sales
  • Recommend a monitorCan anyone recommend a color monitor with a composite and/or RGB input that works with a heatsink-type 128K machine? Old stuff preferred. The smaller…

    ... input that works with a heatsink-type 128K machine? Old stuff ...
    J?rg Pleumann J?rg Pleumann September 2004 Sinclair Miscellaneous
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    When my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing.

    I know I need to wait about 14300T after interrupt but how can I tell if the ULA is now past the border and onto the screen?
    robpearmain robpearmain September 2004 Development
  • Where to get Speccy bits and pieces...Hi everybody, My poor little 16K Speccy is begging to be fixed but I think the ULA has given up the ghost - when I power it on the screen stays the …

    ... fixed but I think the ULA has given up the ghost ... tick (which I believe the ULA is responsible for).
    Anyhow ... I can find a 5C112 ULA as is in this machine ...
    Spirantho Spirantho October 2004 Sinclair Miscellaneous
  • KB1/2 QuestionHello all.. New to the forum and all that (posting at least), 'nuff said. At the the risk of making a fairly dull first post, I wondered if anyone …

    ... />
    Now I know the ULA and membrane are fine but ...
    farouche farouche October 2004 Sinclair Miscellaneous
  • New member, dead SpeccyHallo everyone, I was directed here from a Commodore (boo, hiss) forum after pleas of aid with my newly acquired, quite dead 128k Speccy. I sincerely…

    ... , but if it's the ULA that's been blown to ...
    idrougge idrougge December 2004 Sinclair Miscellaneous
  • Slowly getting dead... (ZX48)Well, in a post of mine, I said that i have a problem with B,N,M,Symb.Shift and space. Then when i opened this wonder of technology, i saw that the t…

    ... or not. I mean dead ULA or dead membrane, no processor ...
    tayanc_molla tayanc_molla January 2005 Sinclair Miscellaneous
  • Spectrum IC1'sHi, I got 2 version 6a's both of which i think have dodgy Ferranti ULA 6C001E-7 IC1's. One's keyboard doesn't respond (have tried different keyboard…

    ... i think have dodgy Ferranti ULA 6C001E-7 IC1's. One ...
    Ricey Ricey February 2005 Wanted
<1…9101112131415…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
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    John Elliott on April 21
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    rich_chandler on April 21
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    harriusherbartio on April 21
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    harriusherbartio on April 21
  • 1992 Spectrum Software
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  • Why are Heatsink Spectrums soo Rare ?is it a case of quanity ? if so how many did they make. In fact, i would love to know how many rubber 16k, rubber 48k, +`s, +2`s etc... where made, d…
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