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Search Again :: Adv Search 1000 results in 0.006s
<1234567…34>
  • Test ROM Cartridge For SaleI'm selling another load of gear including a Sinclair Research Test ROM Cartridge. [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4000772…

    ... the keyboard tails are at fault.

    2. The Border ... ULA is almost certainly at fault.

    6. The RAM ... bit; if there is an addressing fault then these may appear correct ...
    murtceps murtceps October 2009 Sales
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... which will tell you the fault - probably.

    If it ... , then it's probably an addressing fault. You can check this with ... unlikely to be a ULA fault. If your -5V is lower ...
    Spirantho Spirantho January 2015 Hardware
  • Dead SpectrumHello guys, I've just bought a dead Speccy 48k (Rubber Keyboard Issue 3 board). Basically, when powered on it initially appears to boot up ok, but in…

    ... 's slightly more probable the fault is in the upper RAM ... it could well have an addressing fault that'll prevent proper initialisation ... .

    If the fault is in upper RAM, depending ... on the nature of the fault, it might not even be ...
    Zorn Zorn August 2015 Hardware
  • Microdrive fault.I guess some of you may know this... My microdrive has a problem: the motor starts running as soon as I plug the computer in, and won't stop! It is …

    ... is not the interface's fault, as it behaves the same ...
    Alessandro Tommasi Alessandro Tommasi April 2001 Sinclair Miscellaneous
  • Spectrum +3 fault - flashing screen on power onHi ive just bought a +3 When I power it on the power led and disk drive led come on. The screen just flashes black and white around the border, almos…

    ... ideas as to what the fault is?

    ta ...
    mlasham mlasham December 2002 Sinclair Miscellaneous
  • Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…

    We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working one, and we got the same result.

    is this a ram fault? How can we check ram chips?
    Arda Arda December 2006 Hardware
  • Hardware fault - HELP!I bought a speccy 48K (rubber) on Ebay. I was delighted when it arrived. It was in PRISTINE condition, it looks brand new! However, the machine has a…

    ... ! However, the machine has a fault. The seller has no idea ... that the machine has a fault, so I'm reluctant to ... condition...

    So, the fault? Well, SOME of the keys ... conclude the hardware is at fault. A couple of questions:
    Mark Wills Mark Wills February 2008 Hardware
  • Spectrum 48k Fault - anybody seen this before?Hello, I have two 48k spectrums that exhibit the same fault. Black border, paper area is full of columns of wavey lines. I have posted a screen sho…

    ... spectrums that exhibit the same fault. Black border, paper area is ... anybody seen this kind of fault before that could let me ...
    zx2628 zx2628 November 2009 Hardware
  • Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…

    ... if the memory is at fault, and which chip?

    JohnH JohnH November 2009 Hardware
  • Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…

    ... can help me with a fault that has just developed on ...
    pasty72 pasty72 December 2010 Hardware
  • Possible design fault in +2A/+3 power pack. Fix?It's the second time a +3 power pack ceases to work when I make a short while using the scope to diagnose a +2A/+3 computer. And it's the second tim…

    ... , and... why the 2N2222 became fault. So I peeked at the ...
    mcleod_ideafix mcleod_ideafix February 2011 Hardware
  • Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…

    ... the car boot has a fault. When you boot it, it ... any reason to be at fault there), and the lines went ...
    Muzer Muzer June 2011 Hardware
  • Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …

    ... tricky to diagnose upper RAM fault, so I thought I'd ... Spectrum. This usually indicates a fault with the upper RAM or ... was unable to find any fault by testing from BASIC.
    fault from BASIC. I can only ...
    Zorn Zorn April 2012 Hardware
  • Interesting Keyboard FaultWhy-oh-why do I keep buying half-dead Speccys off fleabay. Bought this one as a source of spares, it was listed as having a non-working keyboard due…

    ... due to a possible ULA fault, I had a correct (but ...
    napoleonblownaparte napoleonblownaparte August 2012 Hardware
  • display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…

    ... the Spectrum's display file addressing was designed. So I've ... this:

    display file addressing (HL):
    H =010ssppp, ss ...
    Battle Bunny Battle Bunny July 2013 Sinclair Basic
  • Does this addressing technique have a name?Hi All, Bit of a weird/unnecessary question, but can anyone help build on my knowledge of asm terminology by telling me what the *second* method of …

    ... what the *second* method of addressing is referred to as?
    Addressing':

    LD A,21 ... this same 'next door neighbours' addressing by ....

    Second Method ...
    Jagd Tiger Jagd Tiger March 2014 Development
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    ... to look to resolve the fault with my issue two board ... anything similar sounding? Perhaps a fault on the LM1889N?

    Wiggs Wiggs September 2014 Hardware
  • Newbie with a faultHi all just joined after digging my spectrum out of the loft after 30 years, it was put up there because it had a common fault I remember from back i…

    ... because it had a common fault I remember from back in ... sure this is a common fault.
    Many thanks. btw its ...
    Boogie-time Boogie-time January 2015 Hardware
  • Addressing mode of LDIR and LDDRWhat addressing mode would the instructions LDIR and LDDR be classed as using? Would I correct in thinking that they're register indirect, as both t…

    What addressing mode would the instructions LDIR and LDDR be classed as using?

    Would I correct in thinking that they're register indirect, as both the source (HL) and destination (DE) registers are pointing into memory?
    cmonkey cmonkey January 2015 Development
  • Guess the video faultI've two dead flesh Spectrums, one a 16K issue 2 outputting white with a tinge of blue (not as extreme as photo shows) with two pink horizontal lines…

    ... wrong? Is either a caps fault?

    16k:
    [IMG ...
    brownb2 brownb2 January 2015 Hardware
  • Toastrack fault - anyone recognize it?Hi I took a chance on a toastrack on eBay lately although it had a fault. The problem can be seen on the linked picture below. The problem sta…

    ... lately although it had a fault. The problem can be seen ...
    Kjaerhus Kjaerhus August 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…

    ... some diagnosis.

    the fault occurred about 13years ago whilst ... the upper memory but the fault is still there.

    fault? or is my rom scrambled ...
    cypher007 cypher007 December 2016 Hardware
  • Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …

    ... loss as to where the fault may be.

    The ... an inidcation there was a fault with the upper memory (chips ... />
    Is this a memory addressing problem? The machine doesn't ...
    Renegade Renegade December 2017 Hardware
  • ZX Spectrum +3 keyboard faultHi all I've powered on my zx spectrum +3 for the first time in a couple of years. It seems to have developed a fault with the cursor keys. I can'…

    ... seems to have developed a fault with the cursor keys. I ...
    schneil schneil July 2020 Hardware
  • Design Design / Crystal ComputingNice post on [URL="http://groups.google.com/group/comp.sys.sinclair/browse_thread/thread/56e6ebdedc6930ac#"]comp.sys.sinclair[/URL] about [URL="http:…

    ... /> I can't remember every fault I ran into but the ... .

    (b) Fix the addressing mode parsing so it doesn ...
    kickaha kickaha October 2008 Sinclair Miscellaneous
  • Call Of Duty 4I just got this game but using the onboard graphincs i have to have all the eyecandy turned off, what card would i need to be able to play it with al…

    ... 's fault. It's just the limit of 32 bit addressing. As ... mapped to the system for addressing purposes, so that's why ...
    The Starglider The Starglider October 2008 Chit chat
  • Sprite RotatingI was looking (actually at Everyone's a Wally), and noticed that all the graphics for the main characters are left facing, and two characters wide. …

    ... and severely limited 16 bit Addressing commands then I find it ... ]shouldn't be there - my fault, well spotted - as without it ...
    Turkwel Turkwel June 2010 Development
  • Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …

    ... problem isn't in the addressing, I think that it's ... that it's not a fault inside the ULA? You'd ...
    guesser guesser August 2012 Hardware
  • Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…

    ... track down an intermittent memory fault. It can test either all ... 't detect some types of addressing error, but I think it ...
    Zorn Zorn October 2012 Hardware
  • Help me resurrecting a 128KHello to everybody. I'm really struggling along a repair of a standard 128K a friend of mine handed me over some (ok, actually a lot of) time ago. A…

    ... only possible culprit is the addressing gate array, IC27.[/QUOTE]
    fault of bit 6, but instead ... strip, which translates to a fault in line A0. Just to ... routine reported correctly a D6 fault (blue border and 7 white ...
    Falco-F8L Falco-F8L October 2012 Hardware
<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

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  • Microdrive fault.I guess some of you may know this...<br /> <br /> My microdrive has a problem: the motor starts running as soon as I plug the computer in, and won't …
  • Spectrum +3 fault - flashing screen on power onHi ive just bought a +3<br /> When I power it on the power led and<br /> disk drive led come on.<br /> The screen just flashes black and white around…
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  • Unconventional way of diagnosing a faultHi everyone<br /> <br /> Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 fai…
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