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  • Lowest rated game you intentially bought?What I mean by this is what is the game that you knew full well wasn't rated highly by your fave mag yet, for some unknown reason you bought it anywa…

    ... change games if they are faulty, sorry!'
    Mark R. Jones Mark R. Jones July 2007 Games
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... ;199951]Could it be a faulty RF connector (the big box ... the RF output) or a faulty Ferranti ULA chipset?[/QUOTE]
    faulty too.
    But lets not ...
    gtsamour gtsamour July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... a signal, your modulator is faulty. I would recommend you to ...
    Sonic Sonic July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... on that one could be faulty too.
    But lets not ...
    Phu Phu July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... parts than the 7805 is faulty.
    Pilsener Pilsener July 2007 Hardware
  • HelpI have received my RGB SCART / P?ritel cable for my +2A, and now I have attempted to connect it, resulting in a crap signal on my TV! Can someone hel…

    Have you another Spectrum to try?
    It is possible that the RGB port on your Spectrum may not be working correct a faulty component perhaps.


    Mike.
    swift240 swift240 July 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    sounds like faulty ram
    guesser guesser July 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... of the memory chips is faulty the next ones in line ...
    MARKZX MARKZX July 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... of the memory chips is faulty the next ones in line ...
    DEATH DEATH July 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... of the memory chips is faulty the next ones in line ...
    Winston Winston July 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... sign that there's a faulty 4116 (lower 16K RAM) chip ...
    Winston Winston July 2007 Hardware
  • Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…

    ... drive is working and not faulty, as in need to get ...
    swift240 swift240 July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... (see signature below) - for example, faulty output stages (so the chip ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... row can't all be faulty..."

    I can supply ...
    Phu Phu July 2007 Hardware
  • more Spectrum uploadsHI all, just to let you know I've added some more stuff, including a white spec +, more keyboard development sketches for Geoff, Alpha Numeric pad, …

    ... silicon wafer as one device. Faulty / Dead RAM segments were disabled ...
    Quazar Quazar July 2007 Sinclair Miscellaneous
  • Spectrum 128K - Needs Your HelpI have a Spectrum 128K (with the external heatsink on the RHS) it is a 1985 Version 6K mainboard, I got it out of the loft the other day and it wont …

    ... possible for it to be faulty.

    My wild guess ... it and swap out the faulty parts :)

    -- Richard
    Phu Phu July 2007 Hardware
  • Regarding older dot-matrix printersLong ago I had the [URL="ftp://ftp.worldofspectrum.org/pub/sinclair/hardware-adverts/ZXLprintIII.jpg"]Lprint III interface[/URL] and I still have (in…

    ... printer is found to be faulty? Rich mentioned that there aren ...
    BruceNorton BruceNorton July 2007 Hardware
  • Is it my dvd-r's or my dvd recorder ?I have bought some new DL dvd blanks and some SL blanks but i seem to be burning about 95% coasters how can i tell if the probs with the discs or the…

    ... brand youll know shouldnt be faulty.
    try a rewritable so ...
    mel the bell mel the bell August 2007 Chit chat
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... know" if the memory is faulty unless it is written back ...
    dmsmith dmsmith August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... know" if the memory is faulty unless it is written back ...
    zub zub August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... .
    I have never experienced faulty RAM.
    On the ZX80 ...
    Geoff Geoff August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... happens if the memory is faulty, when dec (hl) is executed ... zero if its faulty. So dec (hl) on faulty memory would result ... still be zero cause its faulty. But the test wouldnt know ...
    dmsmith dmsmith August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... many cases, if memory is faulty, this routine won't detect ... it will always detect a faulty chip where the chip's ... the hardware is missing (or faulty to the extent that the ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... the memory were to be faulty/not present and therefore reads ... the memory were to be faulty/not present and therefore read ...
    Laser Laser August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... many cases, if memory is faulty, this routine won't detect ...
    Laser Laser August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... the hardware is missing (or faulty to the extent that the ...
    zub zub August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... technique to locate the actual faulty chip. I've run into ... quite a few faulty 4116s that'll pass every ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... run into quite a few faulty 4116s that'll pass every ...
    Laser Laser August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... heat up.

    Re: faulty speccy RAM, I've experienced ...
    Digital Prawn Digital Prawn August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... is usually just an intermittently faulty chip. It'll work for ...
    Winston Winston August 2007 Sinclair Miscellaneous
<1…19202122232425…34>

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