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Search Again :: Adv Search 1000 results in 0.032s
<1234567…34>
  • Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …

    ... trying to fix up my Issue 2 and have run across ... a bizarre issue that I haven't ... narrative:

    Spectrum: Issue 2, 48k
    Initial problem: Yellow ... VR1,2 fixed the colour issue.
    2. MEMCHK returned 32767, upper RAM fault. ...
    Trafferth Trafferth August 2014 Hardware
  • 48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …

    I have 48K issue 2 board (I've checked, ... with

    bit 2 = IC16 (IC7)
    bit ... 174 = 10101110

    bit 2 = IC16 (IC7) (from 166 result ... are only in the upper RAM as it will actually ... makes me wonder if another fault exists. It has been ...
    kurbeco kurbeco August 2019 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…

    ... with a fault that has just developed on my issue 2 speccy.
    pasty72 pasty72 December 2010 Hardware
  • Issue 2 voltage troubleDear all, I got my hands on an old issue 2 from a friend. Price was close to zero so I did not hesitate to take it. After powering it up I was sur…

    ... my hands on an old issue 2 from a friend. Price was ... success. Next guess was some fault in the video circuit but ... conditions. Temperature of the lower RAM seems to be not unusual ... or that some of the RAM or capacitors has a short ...
    maskenlos maskenlos December 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. …

    ... issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault ... , writing the decimal value 2 to each one. This ... byte (it should be 2), subtracts one from it ... to be 2, as written by the RAM-FILL routine). ... than telling the RAM to store 2 in all locations.< ...
    Zorn Zorn April 2012 Hardware
  • ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…

    ... have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy ... read would indicate a lower ram failure. I have lightly touched ... seem cool.

    The ram fitted is 8322 4116 2N ...
    serene serene June 2013 Hardware
  • Issue 2 Spectrum - Black screenHi I have an issue 2 spectrum which I'm having some issues with. I bought it on ebay so have no idea of the history or how it came to be broken. Whe…

    ...

    I have an issue 2 spectrum which I'm having ... that this is an upper RAM fault.
    As instructed I measured ... the resistance of pin 2 of the lower RAM and found 1 ... another note, I had an Issue 3 Spectrum that was also ...
    whoremoan whoremoan November 2014 Hardware
  • Issue 2 Upper Ram, Loading & ResettingI have a 48k Issue 2 Speccy and for the life of me can't track down what the problem is with it. I initially thought that some of the uppe ram ic's w…

    I have a 48k Issue 2 Speccy and for the ... on to desoldered the upper ram ic's, socketed the ... board and replaced the ram with known good chips. ... the upper ram with known good ram from another Issue 2, same chips ... cant now be the upper ram as I swapped and ...
    retrogamemart retrogamemart December 2014 Hardware
  • 48k issue 2 video issueHi folks. I am currently tring to fix an issue 2 board. I was getting the yellow greenish screen. (also there there is a lower ram fault with it i th…

    ... currently tring to fix an issue 2 board. I was getting the ... there there is a lower ram fault with it i think) I ...
    Firefox11 Firefox11 January 2015 Hardware
  • Issue 2 Board - CPU 'Patch'I've been wondering why my issue 2 board has been kicking out this signal when powered up... [IMG]http://www.drumfu.com/ResizedDuffIssue2.jpg[/IMG] …

    ... 've been wondering why my issue 2 board has been kicking out ... is symptomatic of a CPU fault.
    I've had the ...
    jp jp September 2008 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... a pair of non-working issue 2 48K Spectrums that
    ... br />
    The lower RAM chips are marked ITT 4116 ... looking RAS signals at all RAM chips (upper and lower ... and input pins of all RAM chips
    (upper ... WE is ~5V at all RAM chips (upper and lower).
    Zorn Zorn November 2011 Hardware
  • My Issue 2 spectrum"IT'S ALIVE!!!!!" - Dr Frankenstein I got my issue 2 spectrum up and running, colours and all. I borrowed socketed lower ram from my issue 3 that is…

    ... />
    I got my issue 2 spectrum up and running, colours ... borrowed socketed lower ram from my issue 3 that is working ... not find its upper ram. It is quite possible ... as it did lower ram and cpu. They are ... is finally fixed, my Issue 2 spectrum 48k lives with ...
    Johan1973 Johan1973 May 2012 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    ... been trying to upgrade my Issue 2 with the help of Velesoft ... /> I can not find the fault, and I am starting to ...
    Johan1973 Johan1973 July 2012 Hardware
  • 16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …

    I today got an Issue 2 16k board (thank you PMSR) ... i added the logic and ram on to get a 48k ...
    Johan1973 Johan1973 August 2012 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    Ive got an issue 2 here that firstly had a ... the whole upper RAM, still same issue, Paul Farrows RAM tester produced no ...
    Macc Macc August 2012 Hardware
  • Issue 2 problemHeres a video of what happens when I fire up an Issue 2 board ive had hanging around for ages, this is with Paul Farrows RAM test cart in btw If this…

    ... when I fire up an Issue 2 board ive had hanging around ... , this is with Paul Farrows RAM test cart in btw
    RAM ill give it a go ...
    Macc Macc November 2012 Hardware
  • Issue 2 video problemHello all, Need some help with an issue 2 board that I 'm trying to restore. I've replaced all the electrolytic capacitors, changed the voltage regu…

    ... /> Need some help with an issue 2 board that I 'm trying ... the board came to life. Ram is ok and my divide ... have no problems with another issue 3 board. My knowledge in ...
    Pluto63 Pluto63 December 2012 Hardware
  • Compatible Memory Chips for Issue 2 48K MotherboardHi I was wondering if anybody have a list of manufacturer chips which is compatible with the Issue 2 48K Motherboard, especially the upper 32K RAM.…

    ... with the Issue 2 48K Motherboard, especially the upper 32K RAM. According to ... must be used in the Issue 2, where Issue 3 will work with ... an Issue 2 board and found that 7 of the 8 RAM chips ...
    Pierre Pierre April 2013 Hardware
  • Issue 2 colour problemsHey all, I've got a slight colour problem with my Issue 2 Spectrum, as can be seen below: [IMG]http://www.bennyalford.com/images/issue2a.jpg[/IMG] …

    ... slight colour problem with my Issue 2 Spectrum, as can be seen ... trim adjustments available on this issue, but one further complication is ... seems to be a solid fault.

    Is it worth ...
    balford balford June 2013 Hardware
  • Issue 2 black paper white borderGot an issue 2 here that has a 6c001e ULA, no cockroach, no transistor mod (although you can clearly see on the top of the z80 and on some legs, some…

    Got an issue 2 here that has a 6c001e ... ) now Im using Zorns excellent RAM upgrade for the lower memory ...
    Macc Macc July 2013 Hardware
  • No colour - Issue 2 SpectrumThis one is driving me mad - any suggestions appreciated. I have an issue 2 Spectrum with no colour at all. I found the 12v rail was at just over …

    ... />
    I have an issue 2 Spectrum with no colour at ... 9v, and although the RAM was working, assumed this ... them on a different issue 2 board to verify it ... have a fully working issue 2 board to check against ... on another board (faulty RAM), I will try and ...
    Graham Graham October 2015 Hardware
  • 48K Issue 2 Spectrum showing exactly 16KI've acquired an issue 2 and it quickly became clear that only 16K of memory is available. I've read that some early 48K Spectrums with malfunctionin…

    I've acquired an issue 2 and it quickly became ... 48K Spectrums with malfunctioning upper RAM were sold as 16K ... are populated and the upper RAM are all TI and ... tell me that the upper RAM has been disabled? If ... the lowest upper RAM IC is faulty, can ...
    LoonyJetman LoonyJetman August 2016 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…

    A friend send me his issue 2 Spectrum for diagnosis. It boots ... , which failed the upper memory RAM test, suspecting IC25 and 26 ...
    protek protek January 2017 Hardware
  • Issue 2 problem.Hi all, I'm trying to repair / upgrade an Issue 2 Spectrum for a friend, but have come accros the following problem. When I power the machine …

    ... to repair / upgrade an Issue 2 Spectrum for a friend, but ... cartridge in my Interface 2 (or RAM turbo), the menu ... 16K fitted the sinclair ram test works and says ... the machine has 16K ram which is completely working. ... upper 32K and the RAM test will fail with ...
    prime prime February 2017 Hardware
  • No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…

    ... 'm trying to fix an issue 2.

    The symptoms are ... as tested on the lower ram chips.

    It will ...
    lesoleil70 lesoleil70 April 2017 Hardware
  • Broken Issue 2 - likely culpritsI've just got hold of an issue 2 spectrum with an interesting layout (heatsink is vertical and goes down to the speaker, some variable resistors and …

    ... just got hold of an issue 2 spectrum with an interesting layout ... that far and a lower RAM issue is also questionable as again ... get that far. Maybe an issue with a chip as it ...
    dave18 dave18 March 2018 Hardware
  • retro - edge issue 2ive just managed to grab a copy of the retro edge magazine issue 2 , its excellent , loads of reviews of old classics such as chuckie egg , lords of …

    ... of the retro edge magazine issue 2 , its excellent , loads of reviews ...
    sirclive1 sirclive1 February 2003 Games
  • ZX DIGEST ISSUE 2 - NEARLY FINISHED!HI FOLKS! ZX Digest issue 2 is nearly finished, at the moment it looks like its going to be about 25-30 pages long. We have incorperated many new s…

    ... FOLKS!

    ZX Digest issue 2 is nearly finished, at the ... are hoping to to release issue 2 towards the back end of ...
    ANDREW RYALS ANDREW RYALS March 2003 Announcements
  • ZX DIGEST ISSUE 2 - NEARLY FINISHEDHI FOLKS! ZX Digest issue 2 is nearly finished, at the moment it looks like its going to be about 25-30 pages long. We have incorperated many new s…

    ... FOLKS!

    ZX Digest issue 2 is nearly finished, at the ... are hoping to to release issue 2 towards the back end of ...
    ANDREW RYALS ANDREW RYALS March 2003 Sales
  • ZX DIGEST ISSUE 2 - FINISHED AT LONG LAST!Hello everyone! I have finally finished Issue 2 of ZX Digest. The final touches are being applied and I' just tarting the thing up! Sorry for the lo…

    ... />
    I have finally finished Issue 2 of ZX Digest. The final ...
    ANDREW RYALS ANDREW RYALS September 2003 Announcements
<1234567…34>

Latest Posts

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HitBox

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ram 12.6K 21.4K
fault 4.2K 4.8K
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  • Seriously weird Issue 2 issue... (RAM-related)Hi guys;<br /> <br /> I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopef…
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  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
  • Issue 2 Speccy faultHi Guys,<br /> <br /> I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy.<br /> <br /> After perserverin…
  • ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…
  • Issue 2 Upper Ram, Loading & ResettingI have a 48k Issue 2 Speccy and for the life of me can't track down what the problem is with it. I initially thought that some of the uppe ram ic's w…
  • 48k issue 2 video issueHi folks. I am currently tring to fix an issue 2 board. I was getting the yellow greenish screen. (also there there is a lower ram fault with it i th…

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