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<1…12131415161718…34>
  • just thinking about ...compo for zx 16k ? anyone ?

    ... that are rather common on 48 or even on 128. but ... , you have about 8-9 KB to play (which is VERY ...
    Fikee Fikee November 2009 Development
  • faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…

    I'd still put money on it being lower RAM. (I've replaced plenty of faulty lower RAM chips, but never found a hot one).
    Winston Winston December 2009 Hardware
  • faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…

    ... 've replaced plenty of faulty lower RAM chips, but never found a ... . In your experience how many chips usually need replacing cos if ...
    rustyredline rustyredline December 2009 Hardware
  • 16 K Sinclair Spectrums Still Available?Hi. I wanted to know if the 16 K Sinclair Spectrums are still available to buy. I have looked around on the net without any success. Maybe someone kn…

    ... /> One of my ZX 48 K is faulty and I will test ...
    -Micky -Micky January 2010 Sinclair Miscellaneous
  • Best Spectrum game from 2009Ok, its almost 2010, and we have to decide which was the best game this year :) Miles Mad Mission [url]http://www.worldofspectrum.org/infoseekid.cg…

    ... is Pentagon which is 128 kB machine with 3,5 MHz ... non-standart machine, it has 48 Hz frame rate, thus having ...
    Shiru Shiru January 2010 Games
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... about memory.We have 128 kB. So the approximate memory ... )

    - about 10 kB music

    -about 10 ... all)

    -about 10 kB - level maps.

    -----------------------------< ... size: I think that 48 pixels for the main character ...
    Ralf Ralf January 2010 Development
  • more memoryi dunno if this has been mentioned, apologies if it has (i cant be arsed to search :P) Ive just been reading about the zx81 and it popped into my he…

    ... and installing 8? little memory chips onto the motherboard.

    48 into a 64 or someat ... struggled to fit everything into 48
    mel the bell mel the bell January 2010 Hardware
  • At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…

    ... x speccy +'s (2 faulty and need membrane + chips replacing ) , a 48k ...
    fog fog February 2010 Chit chat
  • Castlevania ZXDoes anybody know what happened to the Castlevania ZX project? Yet again another great game that missed the Spectrum but had a port on the C64 [url…

    ... put more interfaces) and 128 KB of RAM (so it does ... not matter if you have 48 or 128K).

    The ...
    kgmcneil kgmcneil March 2010 Development
  • Earliest ULA datecode ??I'm on a mission to find the earliest ULA datecode. Ie, when the first batch of ULA's were manufactured. The earliest picture of the Spectrum circu…

    ... 8213 Modulator 8226, NEC memory chips with no datecode 240808 ?177 ... 48 1 5C102E 8223 Z80A 8213 Mod 8226,NEC memory chips ... 014599 1
    001-015140 48 171009 ?36,resale 111209 ?17 ... 151008 ?21
    001-019392 48 160908 ?13.50
    001 ...
    Jakeyw Jakeyw March 2010 Sinclair Miscellaneous
  • Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…

    ... some methods of desoldering 4116 chips here : [url]http://www.worldofspectrum ... />
    if a 4116 is faulty, I think I'll gice ... best because most of the chips can be removed without using ...
    gibs gibs March 2010 Hardware
  • Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…

    ... ]
    If the ram is faulty and if I cut the ... if any of the RAM chips in the lower bank is ... often a sign of a faulty chip.
    Or you could ...
    Pilsener Pilsener March 2010 Hardware
  • Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…

    ... a large screen memory (16 KB) coupled with no hardware assistance ... of a load of VIC chips that it had made for ...
    Alien 8 Alien 8 April 2010 Sinclair Miscellaneous
  • BBC B ebayI've just bid on a BBC micro on ebay, here's what they say in the listing:- ' BBC model B computer from the 80's working fine when we put it up the …

    ... completely honest, I find a faulty 'B an easier prospect of ... are socketed, me hates desoldering chips, fitting a socket and then ...
    spider spider May 2010 Chit chat
  • Big Trak is Back!This should make a lot of big kids happy! [url]http://www.onebo.co.uk/products/Bigtrak-Tank.html?gclid=CI7gh__1wKICFQ-Y2AodyFl46w[/url] And Bigtrak…

    ... of years ago (it was faulty)

    I took it ... /> Needs one of the logic chips iirc...
    spider spider June 2010 Chit chat
  • ZX Spectrum + Issue 6A Repair attemptHello everybody! I got ZX Spectrum + which doesnt work properly. On power up I can see color mosaic, then paper goes black and i can see thin red ba…

    ... I assume the upper RAM chips aren't socketed? In that ... ), or an ULA that's faulty but not completely dead. Let ...
    RetroTechie RetroTechie July 2010 Hardware
  • ZX Spectrum + Issue 6A Repair attemptHello everybody! I got ZX Spectrum + which doesnt work properly. On power up I can see color mosaic, then paper goes black and i can see thin red ba…

    ... RetroTechie. I try this tomorrow. Chips are not socketed :cry: I ... upper memory, if it is faulty computer hangs for sure. Thats ...
    emes30 emes30 July 2010 Hardware
  • New Russian ZX clones available?Is it possible to buy new Russion ZX clones? I mean where these computer build nowadays? Micky

    ... , VGA output (requires display with 48.8 Hz support). Available as ... (means no turbo mode), 1024 KB, AY, FDC. mATX board, PS ...
    Shiru Shiru August 2010 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... known is that Sinclair used faulty 64Kbit chips to implement the upper ... has sockets on upper memory chips, two multiplexers, the 74LS00 ... , but the CPU which proved faulty.

    But, above ... responsible of bit 0 is faulty, the screen displayed is like ...
    mcleod_ideafix mcleod_ideafix August 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... ;473626]More than 512 kB RAM would surely be ... hard for connect with separate chips 74xx or GAL's. ... is use low price CPLD chips in PLCC socket ! (as ... about.[/quote]
    CPLD chips are 5V tolerant and all ... You can sell spare CPLD chips ( or include spare CPLD ...
    velesoft velesoft September 2010 Hardware
  • Help and Advice with DivIDE PlusHi Guys, Really struggling to get any reliable actiivty with my DivIDE Plus and am looking for some pointers. I am trying to get it to work with on…

    ... 473752]I believe you have faulty Z80 M1 line, probably ... , if you have a faulty M1 line, the DivIDE ... 4 spare modern Z80 chips which I could make ... them(?)

    [b]Faulty M1 Line?[/b]
    I ... unlikely that they all have Faulty M1 lines.
    Also ...
    BloodBaz BloodBaz September 2010 Hardware
  • Spectrum lost upper memoryHi again, I have a Rubber key Spectrum(issue 4S) which lost it's whole upper memory. It's worked okay, but i forgot it on over last night. My son wa…

    ... out. There are 8 RAM chips making up the upper RAM ... of two types of "half faulty" RAM which you need to ...
    BloodBaz BloodBaz September 2010 Hardware
  • How do I make a ROM selector switch ?I would like to have a ROM switch for my good old Alesis HR-16 drum machine, so I can switch between 2 sets of ROMs to get different sets of sounds. …

    ... a faulty chip.

    I'll get some more chips and ...
    Pilsener Pilsener September 2010 Chit chat
  • DIVIDE games crashingMy DIVIDE arrived today complete with 512K CF Card, ready to go. First impressions, really good - simple file browser works fine & games load no prob…

    ... switch from +3 basic to 48 basic:
    1) ... switch from +3 basic to 48 basic without reset. And memory ... 3) OUT 32765,48 - switch ZX to 48 basic with true ... you replace +2B rom chips with ZX128 rom then will ... MODE - start to 48 mode (48 rom with 48kB memory)< ...
    velesoft velesoft September 2010 Hardware
  • zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…

    ... you what memory bank is faulty (which I find not very ... -i.e. which chip- is faulty).

    Is the border ... ), composed each one of 8 chips. One of these banks is ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • Broken +3I have noticed that some members on this forum prefer to repair Spectrums instead of just buying another one from ebay. I would like mine fixed at so…

    ... s either a faulty Z80, or a faulty ROM B, or ... you have IC3 to IC6 chips socketed, then remove the ... Then, remove the four memory chips, and start trying them, ... putting two chips on IC3-IC4 sockets ... least, two working memory chips, you will be able ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…

    ... which IC's can be faulty ?

    PS I am ... swop around to determine the faulty IC's I have ordered ... well as a few KM14256 chips (they should be here tomorrow ...
    ZXZaber ZXZaber October 2010 Hardware
  • zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…

    ... have to determine which memory chips are faulty. If you can do ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…

    ... first batch of ULAs were faulty and had a "Dead Cockroach ... of the Z80. However, the chips were all compatible as such ...
    The President The President October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... all 48 and 128K+ ULAs.
    Attached them on the chips with ...
    gtsamour gtsamour October 2010 Hardware
<1…12131415161718…34>

Latest Posts

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