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  • 128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…

    ... [/url]

    ...issue 4 schematic, note TR6.

    The ...
    Winston Winston September 2010 Hardware
  • 128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…

    ... TR6 is shown on the schematic, it was implemented on the ...
    Jonathan Harston Jonathan Harston September 2010 Hardware
  • TR-DOS and DIVIDE emulationSome ZX emulators ([B]SPIN, FUSE, SPECEMU, SPECTACULATOR[/B]) contain configuration menu with possibility select ZX Spectrum model and interfaces. Bu…

    ... *.SCH file as virtual interface (SCHematic from Eagle). And for memory ...
    velesoft velesoft September 2010 Emulators
  • TR-DOS and DIVIDE emulationSome ZX emulators ([B]SPIN, FUSE, SPECEMU, SPECTACULATOR[/B]) contain configuration menu with possibility select ZX Spectrum model and interfaces. Bu…

    ... *.SCH file as virtual interface (SCHematic from Eagle). And for memory ...
    Philip Kendall Philip Kendall September 2010 Emulators
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    how about i show you the old schematic? if i can find it
    Robin Robin September 2010 Chit chat
  • Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…

    ... a 4116 datasheet or 48K schematic for correct pins, they should ...
    RetroTechie RetroTechie September 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... that whole area of the schematic is riddled with errors, or ... the manual, and on the schematic the pins of the keypad ... should just redraw the entire schematic properly instead of trying to ...
    guesser guesser September 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... switch to using a proper schematic drawing tool instead of a ...
    guesser guesser September 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    I agree with roko. Anyone who tinkers with their +3 will be grateful for an accurate schematic! (And I see you're doing it in gschem, you can even then generate a netlist for PCB so you can make your own +3 PCB if you really wanted to :-) :-) )
    Winston Winston 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. …

    ... also found a ROM selector schematic for a device using 27C512 ...
    Pilsener Pilsener September 2010 Chit chat
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... redrawing/correcting of the +3 schematic I'm uncovering lots of ... are many differences between the schematic from the "+2A +3" diagram ... them are errors as the schematic has several other obvious errors ...
    rich_chandler rich_chandler September 2010 Hardware
  • How compatibel is the Sprinter 2000?How compatibel is the Sprinter 2000? I have one but only trd software runs. Joystick did not work and tape in and tape out too. I have schematics bu…

    ... /> Micky[/QUOTE]

    In Schematic of SPRINTER 2000 and here ...
    velesoft velesoft September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... />
    you've found a schematic showing the transistor circuit instead ...
    guesser guesser September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... ;480849]you've found a schematic showing the transistor circuit instead ...
    Jose_Leandro Jose_Leandro September 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... here's what the completed schematic looks like (at a fairly ...
    guesser guesser October 2010 Hardware
  • Help needed +2 pleaseI have a 128k+ that when powered up through the rgb or aerial connection just shows a black screen. But I can still see the list of options and run d…

    ... datasheet or look up the schematic to find the right pin ...
    Winston Winston October 2010 Hardware
  • Help needed +2 pleaseI have a 128k+ that when powered up through the rgb or aerial connection just shows a black screen. But I can still see the list of options and run d…

    ... datasheet or look up the schematic to find the right pin ...
    Modge Modge October 2010 Hardware
  • Recapping your SpeccyHas anyone ever done it? I have several vintage amps, tuners, cassette decks that have been recapped. So just wondering are there many on WOS who ha…

    ... a special part of the schematic of a device where a ...
    ingo ingo 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…

    ... ]

    According to the schematic I have, IC17-24 are ... contended memory.

    My schematic does not clarify which bit ...
    mcleod_ideafix mcleod_ideafix 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…

    ... lazy) do we have a schematic of the multiface in question ...
    csmith csmith 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…

    ... lazy) do we have a schematic of the multiface in question ...
    Macc Macc 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…

    ... lazy) do we have a schematic of the multiface in question ...
    fog fog October 2010 Hardware
  • Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…

    ... ) wasn't reproduced correctly, and schematic shows which RAM chip corresponds ...
    RetroTechie RetroTechie October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... , I think the +2A/+3 schematic is done, so I'll ...
    guesser guesser October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    I tried to use this schematic to spot a faulty memory ... , but... I couldn't! The schematic lacks the information about which ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... ]I tried to use this schematic to spot a faulty memory ... , but... I couldn't! The schematic lacks the information about which ... for clarity like the +2B schematic, Of course I missed the ... for the RAM chips. New schematic at the same URL.
    guesser guesser October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... need to know which, the schematic was wrong for the +3 ... pin connect, if anywhere (The schematic doesn't show the TEST ...
    guesser guesser October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... pin connect, if anywhere (The schematic doesn't show the TEST ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    Ok, here's the +2B schematic. Hopefully correct but I have no way to confirm that, since I don't have one myself.

    [url]http://alistairsserver.no-ip.org/public/spectrum/schematics/+2Bschematic.png[/url]
    guesser guesser October 2010 Hardware
  • Faulty +2A questionDug out some Spectrums earlier and amongst them I had +2A's which i've never even bothered to power up. First one powered up no probs, clean picture …

    ... isn't part of the schematic. It's not fitted to ...
    guesser guesser November 2010 Hardware
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Latest Posts

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