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<1…24252627282930…34>
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... are indeed inconsistencies in the schematic. Well done for finding those ...
    RetroTechie RetroTechie June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... are indeed inconsistencies in the schematic. Well done for finding those ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • DIVIDE 2k11hello, just short link - for Your info (cpld, 4 layers, rohs, cpld code for future development for clones..) [url]http://lotharek.pl/product.php?…

    ... Xilinx IDE also has a schematic editor method of programming their ... Verilog, you can draw a schematic just like you would for ...
    Winston Winston June 2012 Hardware
  • Spectrum +3 FavourCan a kind soul with a multimeter and a +3 measure the resistance on the power socket between the 5V and the ground? I have a dead +3 that only has 0…

    ... take a look to the schematic...
    [url]http://hardware.speccy ...
    mcleod_ideafix mcleod_ideafix June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... villain, time to examine the schematic and look for a short ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • 'Jumping' Composite Video Output on +2bNot having much luck recently... I have converted my +2b to composite out using the info contained [URL="http://www.secarica.ro/html/plus3_hardware.…

    Hmm... I removed the 1k resistor and soldered the collector straight to +12v as in the schematic and got almost no picture whatsoever. Interestingly enough, I've found that if I touch C35, even the ceramic part then the flicker stops.
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • DIY AY for 48k schematicHello! I can't seem to find a diy schematic for attaching AY to 48k so it gets 128k compatible sound. I see offers to sell ready made devices, but n…

    Schematic of AY interface is here:
    [url]http://hw.speccy.cz/ayinterface.html[/url]
    velesoft velesoft June 2012 Hardware
  • DIY AY for 48k schematicHello! I can't seem to find a diy schematic for attaching AY to 48k so it gets 128k compatible sound. I see offers to sell ready made devices, but n…

    [QUOTE=velesoft;634636]Schematic of AY interface is here:< ... />
    Thanks. That's the schematic i've chosen to implement ...
    ArtemKuchin ArtemKuchin June 2012 Hardware
  • ZX 128k +2 Bad deal - BrokenI recently traded a C64 for a ZX Spectrum 128k +2 (grey model). I sent a fully working C64, with doubles of the tapes I had. I recieved a shabby and …

    yes, it is mono, found it by schematic. Need to do stereo mod.
    Johan1973 Johan1973 June 2012 Hardware
  • Need some advice about electronicsI have wired up an ATX power supply to power my spectrums through a DC-DC converter that gives 9V from the +12V rail. It works well. However, I also …

    ... you could show me a schematic of it, it would help ...
    Johan1973 Johan1973 June 2012 Hardware
  • +2A/+3 schematicsI have downloaded the +2A/+3 schematics and I was wondering what the history of the document is. I also have a pdf by Guesser 30/10/2010. That one …

    ... drawn from scratch in a schematic editor rather than trying to ...
    guesser guesser June 2012 Hardware
  • Issue 4S Schematics and DC-DC circuitA while ago I bought a Spectrum 4S that had problems tuning. I removed the RF tuner as I was not going to use it and did the composite mod. It worked…

    ... components are not on the schematic, and some are. Took me ... connected. Still the issue 4 schematic is of some help, even ...
    Johan1973 Johan1973 June 2012 Hardware
  • Issue 4S Schematics and DC-DC circuitA while ago I bought a Spectrum 4S that had problems tuning. I removed the RF tuner as I was not going to use it and did the composite mod. It worked…

    ... components are not on the schematic, and some are. Took me ... connected. Still the issue 4 schematic is of some help, even ...
    roko roko June 2012 Hardware
  • Wanted: 128 +2 B issue 4 Chips RomHello, I am looking for following chips to repair my (2) 128 + 2 B Spectrum + 2 B The board is an[B] issue 4[/B] [COLOR="Red"][B]and not[/B][/CO…

    [QUOTE=guesser;636539]That image came from the manual for the old flash boards :)[/QUOTE]

    I double checked with the schematic and edited my post. Do you know which kind of RAM chips they are, other than that they're DRAM?
    chev chev June 2012 Wanted
  • Internal amp and signal cleaner for tape inHello! Is there known to work INTERNAL schematic which cleans signal from tape in and amplifies it. I need such thing so i can load from my smartpho…

    ... am thinking about the following schematic:

    1) Input cap ...
    ArtemKuchin ArtemKuchin July 2012 Hardware
  • I have a destroyed SpectrumI have a Sinclair Spectrum 128k +2. When I connect the computer with a monitor, coloured lines that flash on and off appear. How can I detect the de…

    Looks like chip ram problem (MK 4164) on your schematic
    You must found the faults chips,and change them..
    Anemos Anemos July 2012 Hardware
  • Building a PlusD - problemsI'm building a PlusD for myself, but I'm having difficulty getting the ROM to page in properly. At this moment the ZX Spectrum boots, but is VERY slo…

    ... .

    Here's the schematic I used:
    [URL="http ...
    bverstee bverstee July 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... post a link to the schematic you are using?

    ArtemKuchin ArtemKuchin July 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... />
    And this is the schematic I've used. As I ...
    mcleod_ideafix mcleod_ideafix July 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... at it, going through the schematic, checking component for component that ...
    Johan1973 Johan1973 July 2012 Hardware
  • ZX Spectrum ULA core available at OpenCoresHi! On April, 23th, I opened a new project at the OpenCores website: [url]http://opencores.org/project,zx_ula,Overview[/url] Right now, it has a, h…

    ... .[/QUOTE]

    Here is schematic and code. [url]https://skydrive ...
    superfo superfo July 2012 Hardware
  • Odd / interesting things to do with Spectrums, IF1 and Microdrives.Firstly, I did not know where to put this, whether to shoe horn it into one of the more recent microdrive-ish threads, or drag up one of my old ones.…

    ... limitation. Looking at the drive schematic, there is no ?protection? against ...
    RST#08 RST#08 July 2012 Hardware
  • ROM-elHi, I have a bunch of [URL="http://store.go4retro.com/products/ROM%252del-23128%7B47%7D23256-FLASH-ROM-Replacement.html"]these[/URL]. They are 23128…

    ... , I'd not spotted the schematic.

    So indeed you ...
    guesser guesser July 2012 Hardware
  • Schematic of MULTIFACE 128Exist schematic of Multiface 128 ? I find on WOS only pictures of PCB layers. I mix both layers for possibility make schematic from picture, but it's…

    ... ]

    A have complette schematic of MULTIFACE 128 created from ... on/off ? This part of schematic is bad... :-(
    velesoft velesoft July 2012 Hardware
  • Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…

    ... book also includes the circuit (schematic) diagram (page 51). Note that ...
    1024MAK 1024MAK July 2012 Hardware
  • Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…

    ... book also includes the circuit (schematic) diagram (page 51). Note that ...
    guesser guesser July 2012 Hardware
  • 80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…

    ... do it. But with the schematic from Timex Ferranti could have ...
    chev chev August 2012 Sinclair Basic
  • 80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…

    ... do it. But with the schematic from Timex Ferranti could have ...
    guesser guesser August 2012 Sinclair Basic
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... =velesoft;644177]Have anyone photos, schematic, rom images, documentation, or software ...
    chev chev August 2012 Hardware
<1…24252627282930…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
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    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
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    harriusherbartio on April 21
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    mel the bell on April 20

HitBox

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interface1 124 168
schematic 1.4K 1.8K

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  • Issue 6a SchematicSince a scanner will only get you so far in reproducing a clear image I decided edit the 6a schematic to take the fuzz out. <br /> <br /> Martin like…
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