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<1…13141516171819…34>
  • How do I fix faulty keys?I have recently bought a 16K Spectrum off e-bay,when I came to test it I found several keys where not working,is there a way to fix this problem by m…

    I have recently bought a 16K Spectrum off e-bay,when I came to test it I found several keys where not working,is there a way to fix this problem by maybe cleaning the connections inside the keyboard or do I need a new membrane? any tricks would be ...
    Darwin00uk Darwin00uk July 2004 Sinclair Miscellaneous
  • 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
  • How many forum members does it take to change a light bulb?Found this on another forum... 1 to change the light bulb. 1 to post that the light bulb has been changed. 14 to share similar experiences of ch…

    ... technique and what brands are faulty.

    27 to post ...
    Lee Fogarty Lee Fogarty 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
  • Broken ZX 48kHey all. I have acquired a broken ZX 48k. It looks in good condition - tried the membrane and it is working with my other 48k very well. When you tu…

    ... that ? Or could it be faulty ROM ? I would say the ...
    Tom-Cat Tom-Cat September 2004 Sinclair Miscellaneous
  • 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
  • Spectrums for saleOver the next week or so I will be putting up on ebay LOTS of spectrums. I'm having a clear out as I need funds to get me a nice number of +3's for …

    ... or 7 Spectrum + - again, some faulty, some not

    3 ...
    ZX Beccy ZX Beccy January 2005 Sales
  • 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
  • Dynamite Dan RZXEvening all. xmikex and myself have just finished an RZX file of Dynamite Dan. All was going well, we had the eight sticks of dynamite and were start…

    ... ; perhaps we are using a faulty tap file. What we are ...
    jamieangus jamieangus February 2005 Games
  • 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
  • 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
  • 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
  • +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
  • Epson do it again!Just found a program which fixes "dead" epson printers, after x amount of uses the epsons have a built in couter which says the printer has failed an…

    ... applied it and fixed their faulty units and it is used ...
    Mort! Mort! August 2005 Chit chat
  • Something wierd!I'm in the process of making a game for the Cronosoft Cassette 50 compilation, called Brian Vs. The Bullies. It's a simple Jet Set Willy type game ma…

    ... wondered whether I had a faulty cable, so I tried loading ...
    pottyboy pottyboy September 2005 Sinclair Miscellaneous
  • huge job lot of retro stuff to sell - bedfordshire, buyer collects No pics, or a list as yet. Just putting out some feelers.( Very little sinclair stuff though - posting this on a few forums I use) Need cash to spe…

    ... />
    There is also a faulty JAMMA coin-op, I can ...
    thx1138 thx1138 October 2005 Sales
  • Faulty ZX Spectrum 48kHi Guys, Been sorting through my rubber keyed 48k machines lately and decided to buy some new keyboard membranes for them. I replaced the membrane …

    Hi Guys,

    Been sorting through my rubber keyed 48k machines lately and decided to buy some new keyboard membranes for them.

    I replaced the membrane in what I thought was a perfect 48k, but sometimes for no reason it will lock up or ...
    Deano7649 Deano7649 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
  • Faulty 128Need some help here. I've got a 128+ that won't boot to the menu. It just displays a load of rubbish on the screen. Here's an example of what it does…

    Need some help here. I've got a 128+ that won't boot to the menu. It just displays a load of rubbish on the screen.
    Here's an example of what it does, although the display varies from time to time.
    [url="http://www.vee6ix.co.uk/DSCF0051.JPG"] ...
    Glenn Glenn November 2005 Hardware
  • MY 1000 POST!!!! WAHOOOO!!!!!WAHOOO!!!!!!!! 1000 posts! Spanning three years I've clocked up 1000, probably mostly non-sencical post of gibberish! What wonders have I learnt o…

    ... its receipt as it was faulty. Sadly no refund or exchange ...
    ZX Beccy ZX Beccy January 2006 Chit chat
  • Is this fair/legal?About a year ago, I bought a (512MB) mp3 player, and after a while it stopped playing music in one channel. I took it back to the shop, and they repl…

    ... had been tested and was faulty, and they'd sent it ...
    ewgf ewgf March 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
  • Scart Lead faulty?Hi, I`ve been using a scart lead on my Spectrum +2B for a couple of years now. I got a new TV a few months ago and decided yesterday to try the specc…

    Hi, I`ve been using a scart lead on my Spectrum +2B for a couple of years now. I got a new TV a few months ago and decided yesterday to try the speccy out on it. The picture is all fuzzy and broken with the scart. I tried it with an RF lead and its fine ( ...
    BuzzySounds BuzzySounds May 2006 Hardware
  • If you're going to rip someone off......don't sell them a faulty laptop as working and leave all your contact details and lots of dodgy photos on it. [url]http://www.amirtofangsazan.blo…

    ...don't sell them a faulty laptop as working and leave all your contact details and lots of dodgy photos on it.

    [url]http://www.amirtofangsazan.blogspot.com/[/url]

    The word "owned" doesn't even begin to describe this one.
    Malc74 Malc74 May 2006 Chit chat
  • Dell Laptop BluesDell are currently doing a worldwide recall of their laptops made during the last year because of a faulty battery which has a tendency to spontaneou…

    ... last year because of a faulty battery which has a tendency ...
    Ian Hamilton Ian Hamilton August 2006 Chit chat
<1…13141516171819…34>

Latest Posts

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  • 1992 Spectrum Software
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