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Search Again :: Adv Search 1000 results in 0.011s
<1…15161718192021…34>
  • A 64K Spectrum?? Is this real?I have seen avertised on Ebay today two boxed ZX Spetrum Rubber Keys. One 16K and the other a 64K upgraded model?? Is this for real??? [url]http://…

    Well, I repaired a Issue 2 Speccy putting 4164 chips on the upper memory, so I have a 80K RAM Speccy ;-)
    Hernán Pablo Álvarez Hernán Pablo Álvarez November 2008 Sinclair Miscellaneous
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... , detecting 16K or 48K of RAM available.

    Watch out ... previous version.
    Pseudo-random RAM filling test, with 16-bit ... indication of which bit is faulty.
    No 128K support.
    Digital Prawn Digital Prawn January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... less trustworthy than the screen RAM that the program itself is ... />
    Also if that is faulty, then the program can go ...
    Digital Prawn Digital Prawn January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... going to knock together a RAM test routine today but my ... .2 of [b]16/48K RAM Tester[/b]:-

    [strike ... now shows each faulty BIT of the last faulty byte found (see ...
    Digital Prawn Digital Prawn January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ...
    ;at least 48K of RAM

    JR NC, ...
    NoBitFade

    ;Blank RAM before printing message
    LD ... NotFaultyBit

    ;Bit is faulty
    LD (HL),C ;Load ... br /> String2Edit
    DB "48K RAM",0
    String3
    DB ...
    Digital Prawn Digital Prawn January 2009 Games
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... indeed, they could be faulty, but swopping the ROM ... />
    If your RAM is in sockets, try swopping ... changes - if so, RAM is most likely at fault ... You can get these RAM chips from old style ... br /> If you change your RAM chips, use sockets ;) They cost ...
    DEATH DEATH February 2009 Hardware
  • R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…

    ... one...bet it's lower RAM going faulty. This seems to be ...
    Winston Winston February 2009 Hardware
  • R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…

    ... one...bet it's lower RAM going faulty.
    .... swap chips that ... before (even try) swapping lower RAM!!!

    [QUOTE=Winston;334096 ...
    roko roko February 2009 Hardware
  • New Guy Wants Speccy - SWAP !Hi, I`m new here so here is a little background info ! I always had a C64 when I was in my teens in the 80`s, my friends had Spectrums, so it was alw…

    ... :D

    4116 RAM chips, 4164 upper RAM chips, any of the ...
    DEATH DEATH February 2009 Wanted
  • Keys don't work even with new membrane, HELP!Hi folks. I have a 1983 48k Zx Spectrum. It powers up fine, but none of the keys respond. I have tried fitting a new keyboard membrane from rwap, but…

    ... then there is a RAM problem as the RAM test failed. eg ... I GUESS that rules out faulty membrane or a bad solder ...
    spec09 spec09 February 2009 Hardware
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... .
    Basically after replacing 3 ram chips from a spanish 2a ... parts :) .
    They still have 4164 dram?s for the 48k ...
    PauloAlb PauloAlb March 2009 Hardware
  • Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…

    ... membrane). Your upper 32K of RAM is also almost certainly bad ... test the upper 32K of RAM. You may need to run ... find out which chips are faulty depending on the failure mode ... failed chips easiest. Remember Spectrum RAM is one bit wide, not ...
    Winston Winston April 2009 Hardware
  • Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…

    ... it not to be the RAM after all :roll:

    faulty one with my Dad next ... the values read/written to RAM change intermittently then I'm ... mention it before but the faulty board is an Issue 2 ...
    szeliga szeliga April 2009 Hardware
  • Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…

    ... Z80, ROM, lower RAM or ULA were faulty, the Spectrum wouldn't ...
    RetroTechie RetroTechie April 2009 Hardware
  • What spec/age is your computer(s)?Not started a thread for a while so here goes. I have a Desktop Replacement Rock Direct Quaddra Ti 3.4Ghz machine which was 4 years old in January. …

    ... .5GB RAM
    80GB+250GB HDs
    ATI Radeon 9600Pro gfx (faulty ... "
    Sempron 3000+
    512MB RAM
    40GB/40GB/500GB/750GB ... /> Intel Celeron, 667Mhz
    512MB RAM
    40GB HD
    ATI ... /> Commodore Amiga A1200
    2MB RAM
    No HD

    Marko Marko May 2009 Chit chat
  • What spec/age is your computer(s)?Not started a thread for a while so here goes. I have a Desktop Replacement Rock Direct Quaddra Ti 3.4Ghz machine which was 4 years old in January. …

    ... /> AMD 64 3000+
    512MB RAM (Did buy 1GB of 'extra ... fast Ram - cept it turned out to be faulty, just took ...
    Collie Collie May 2009 Chit chat
  • zx81 help neededHi, I got a ZX81 today supposedly in working order, it was for the first two minutes, but after that the keyboard produces the wrong letter, number …

    ... TV picture)
    If the RAM was failing then it's ... .
    If the keyboard was faulty then your typed in program ...
    Jimmy Jimmy June 2009 Hardware
  • building a PCIv'e decided to get my old PC and try and get the thing working again. not really sure what went wrong with it, and instead of buying a new one i pre…

    ... - 1 Ghz Crucial CL2 PC133 RAM
    - ATI Radeon 8500 ... .

    PC133 RAM is a technology called SDRAM ... five years use DDR2 RAM; and the latest boards ... use DDR3 RAM.

    In ... replace whichever component is faulty. You'd normally do ...
    ajmoss ajmoss July 2009 Chit chat
  • Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …

    ... which gives supply to video RAM are faulty (can you hear a ... with a Spectrum with a faulty ROM chip.

    The ...
    mcleod_ideafix mcleod_ideafix July 2009 Hardware
  • Two dead SpectrumsHi all, Long time since I posted on here. I'm having a bit of a clear-out, and I've re-discovered two Spectrums I had in the loft : One is an orig…

    ... means the lower 16K of RAM is dead. 4116 memory seems ... - this will kill lower RAM too because lower RAM needs -5v supplying ... machine may also have a faulty internal power supply. No display ...
    Winston Winston August 2009 Hardware
  • divIDE & Joystick interface / other peripheralsHi, Anyone on here with a divIDE, managed to get the divIDE to play nice with a Kempston joystick interface; specifically - a RAM Turbo joystick int…

    It doesn't though - maybe my RAM-Turbo has become faulty :-(
    The_Beard The_Beard August 2009 Hardware
  • divIDE & Joystick interface / other peripheralsHi, Anyone on here with a divIDE, managed to get the divIDE to play nice with a Kempston joystick interface; specifically - a RAM Turbo joystick int…

    ... t though - maybe my RAM-Turbo has become faulty :-([/QUOTE]

    RAM TURBO interface ? This connector ... you connect only ZX with RAM TURBO, then ZX work ... />
    For 100% parallel connection RAM TURBO + DIVIDE is better true ...
    velesoft velesoft August 2009 Hardware
  • Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …

    ... the Spectrum video RAM bank so it uses 4164 chips instead of ... the available memory on the 4164, but this device uses only ... or DVD's). Besides, the 4164 is far more reliable than ...
    mcleod_ideafix mcleod_ideafix August 2009 Hardware
  • Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …

    ... />
    ram chips have been changed to similar ones - 4164 instead 2 ... and -5V are used by RAM chips in first bank ??
    lotharek lotharek August 2009 Hardware
  • dead issue 6a boardI've just been back to the uk and found my old 48K + there - and bought it back with me to singapore - it's giving white border and red bars. From wh…

    ... image to the video RAM, so you can easily ... missing bit and hece, the faulty chip:
    [img]http ... first division.
    A faulty DRAM chip has often ... image must not use any RAM position. That is, ... no stack, no RAM variables, no interrupts.
    < ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... (does it mean all the RAM chip are damaged?)
    I ... try to see what RAM chip is faulty.
    BTW. I did ...
    xc8 xc8 September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... ? I recall that when a RAM error is found, the processor ... border color according to the faulty bank, but it does not ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    It is possible that bad RAM causes this problem: the Spectrum ... starts using RAM for the stack with the ... stage that there's faulty memory (or a faulty PCB trace/solder ...
    Winston Winston September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... (of the dead +3) WAS FAULTY! When I put the old ... on the sockets only the RAM IC5 and IC6 I see ... on the sockets only the RAM IC3 and IC4 I see ... I ll get the new RAM ICs....


    Chris
    xc8 xc8 September 2009 Hardware
  • Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…

    ... speccy is AFAIK unloaded as 4164 ram ONLY uses a +5 supply ...
    nuggetreggae nuggetreggae October 2009 Hardware
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HitBox

Word Docs Hits
faulty 2.3K 2.8K
ram 12.6K 21.4K
4164 377 528

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  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
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  • Febuary offer - 4164 ram chips: 10pcs ?9, 20pcs ?16Special febuary offer: <br /> <br /> [B]10x 4164 chips[/B]: normally 12 GBP, now for [B]only 9 GBP (11 EUR)[/B] + postage.<br /> [B]20x 4164 chips[/B…
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  • How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement.<br /> Know what I found? My old ZX Spectrum.... Those were the days!<…
  • Faulty Keyboard membraneHello,<br /> <br /> My keyboard membrane of the 48K doesn'nt work anymore,<br /> Does anybody know how to get a new one ?<br /> <br /> Thanks,<br /> …
  • just got three 'faulty' speccys...off of eBay - and found they all work :)<br /> <br /> I was geared up with schematics and soldering irons as well, half hoping to have to get the 'sc…

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