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<1…11121314151617…34>
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... external memory". Looking at some schematics and photos of various divIDE ... except for the video signals /Y, U, V, VIDEO and 0Vvideo. This ... because the interface monitors the video signals in order to synchronise ... to use any of these video lines (when used on a ...
    Fruitcake Fruitcake January 2013 Sinclair Miscellaneous
  • ahh..sooo close :) Spec128k+ RGB on LCD monitor helpHello, Was trying out RGB on my 128k+ and a Samsung Syncmaster 204 lcd monitor. Tried this monitor with a Genesis/Megadrive and a SNES and works real…

    ... />
    There are several inconsistent schematics on the web.
    Paul ... ohm resistor between CVBS and Video In, the other does not ... or CVBS be connected to Video in (pin 20) on ... /hobby/vanmezelf/ZX Spectrum 128K video fixes and video cables.pdf[/url]
    bverstee bverstee February 2013 Hardware
  • Thinking of modding an Atari paddle controller for games like Arkanoid...Hello, Was thinking of trying out a controller mod using an Atari 2600 paddle controller to use with games like arkanoid, Batty, etc... The paddle c…

    ... in mind. Made a short video on trying out an Atari ... the Kempston mouse. Any info, schematics, or how it operates is ...
    thomas3120 thomas3120 May 2013 Hardware
  • Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…

    ... power rail will affect the video signal and will probably damage ... circuits and ability to follow schematics. I encourage you to engage ...
    Zorn Zorn July 2013 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... SCART signals: switching voltage for video switching, audio on scart
    Where can i see the schematics and the gebler files of ...
    flopping flopping August 2013 Hardware
  • Didaktik Gama and M manualsI?m looking for manuals for the Czech Spectrum clones Didaktik Gama and M. Thought this would be an easy task, but I couldn?t find any user or servic…

    ... .htm[/URL]

    Some schematics here:
    [URL="http://zxm ... internal kempston port and TV + VIDEO out. Square ULA chip contain ...
    velesoft velesoft August 2013 Hardware
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... br /> I know the video driver is messy but it ... didn't work with a video capture device I bought. ... works in sync with the video driver. At the moment ... sequence in sync with the video.

    I' ... together and upload some schematics and DIY instructions for ...
    Basher Basher September 2013 Hardware
  • ULA pinsHi I am trying to figure out where on the ULA , among other things, the VYU pins are. I have been reading schematics , but I am really lost when I …

    ... are. I have been reading schematics , but I am really lost ... how the ULA reads from video ram from a hw perspective ...
    guesser guesser March 2014 Hardware
  • Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…

    ... I intend to put the schematics and programing files online so ... and accept them into its video RAM, at least for a ...
    Basher Basher April 2014 Hardware
  • TEA2000 mod for better CVBS quality?Has anyone tried this before? :confused: [URL=http://s1063.photobucket.com/user/JRT480/media/Evenmoreperfect_zpse2505ab9.jpg.html][IMG]http://i1063…

    ... video showing the mod (explained around the 18:25 mark with schematics ...
    Shockwav3 Shockwav3 April 2014 Hardware
  • Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…

    ... in the television composite video input completes the circuit ... 128K circuit produces composite video at twice the required ... pub/sinclair/technical-docs/ZXSpectrumIssue2-Schematics.gif[/url]

    video output is momentarily connected ...
    rga24 rga24 April 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... seems to use the composite video as the RGB switching pin ... every cable should come with schematics to avoid surprise.
    If ... ) that means no more composite video (which maybe good when TV ...
    kpuchatek kpuchatek May 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... every cable should come with schematics to avoid surprise.
    If ... ) that means no more composite video (which maybe good when TV ...
    bverstee bverstee May 2014 Hardware
  • Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…

    ... all TC2068s are worse. The video circuit looks the same on ... against the schematics when I am converting them to s-video.
    rga24 rga24 May 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... I only followed the schematics on your video. I have a very ... a look at Richard's video you will understand that it ...
    Renegade Renegade July 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... for tv schematics and looking at the ones with external video inputs ...
    guesser guesser August 2014 Hardware
  • The MCC-TV (Multiple Classic Computer) ???Someone on another forum mentioned the Multiple Classic Computer (aka MCC-TV), which apparently is a Spectrum, C64, and Amiga in one box. I'd never h…

    ... versions:
    MCC-TV (comp. video output), which is the cheapest ... joypad.
    MCC-216 (S-Video output), which supports 6 cores ... published, neither is documentation or schematics, no forums or user community ...
    RetroTechie RetroTechie February 2015 Sinclair Miscellaneous
  • Video ZX Spectrum+ 48k<span>Good day ... is a bit of time that I try to fix my zx spectrum ... I replaced the ram 4116, all electrolytic capacitors ... but the monitor loo…

    looking at the schematics, I can not convince me that the ULA is the problem, I saw that the video output is controlled by lm1889 ... and later by tr1 and tr2 ... I will do some testing ...
    Puglisia Puglisia May 2015 Hardware
  • Microdrive-Microdrive incompatibility?Hi All! Finally I could get enough Microdrives and connecting blocks (or cable replacement) to make the largest storage configuration of the classic…

    ... is not shown on the schematics. Finally I used 100pF ceramic ... yours have already seen the video on the rather reliably working ...
    jimre jimre July 2015 Hardware
  • Some downloads fail meI want download the schema of the Spectrum +2A and I can not because appears a user and password request in all links of "SCHEMATICS, MANUALS AND TEC…

    ... : http://zxnet.co.uk/spectrum/schematics/

    Because the ... signal (known as composite video) with a ultra high ... when using the composite video signal that is available ... sometimes disconnected to improve the video picture.

    The ...
    1024MAK 1024MAK November 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... +12VA line going to the video chip IC14. (board issue 4a ... ohms, removed most of the video noise.[/quote]

    Ok ... is R42, and according to schematics is a 1Kohm resistor (am ...
    Renegade Renegade December 2015 Hardware
  • Hardware databaseWe don't currently have a comprehensive list of hardware, so will be looking at adding one. So, what categories? Do we count the new machines as …

    ... (on originals) - p.e. a video connection, casings, memory replacements
    schematics, p.e. datasheet for 7805 ... /> Just some issues:.
    Should schematics be in the section hardware ...
    roko roko May 2016 Hardware
  • Spectrum 128k 2a or not 2b....Just picked up a +2 black case version and I'm in as little bit of a quagmire, The case is definitely black, has '+2A' stamped on the bottom, but in…

    ... the modulator socket to composite video, or if you're going ... a 2b so thats the schematics I should be using, now ...
    povvercrazy povvercrazy April 2017 Hardware
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... read the schematics right. They amplify and feed composite video to the ...
    Mad Fritz Mad Fritz June 2017 Hardware
  • ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…

    ... fact that you get a video display, shows that most of ... /sinclair/zxspectrum/Technical/Hardware/ZXSpectrumIssue4ab-Schematics.gif

    If yes ...
    1024MAK 1024MAK August 2017 Hardware
  • I can't get my +2B to work over RGB to SCART.Hi so I have a black +2B and no matter what I do I get a black screen using the RGB-SCART scart cable (specific for the model ) and I'm using a SCART…

    [quote="ivanb303;921824"]So in the schematics it's pin 4 on the peritel connector marked NCSYNC. What should the output be here ?[/quote]
    A composite sync signal. Essentially composite video without the video, just the sync pulses.
    guesser guesser September 2017 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... be better but S-video is not too far ... ll soon realise that s-video is "already there" but ... is changed into composite video and in turn into RF ... /> I quite like S-video output and on some 'vintage ... simple mods, but reading the schematics is (still) hard for ...
    emuola emuola October 2018 Hardware
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …

    ... could have looked at the schematics of the TV, understand them ... output.
    [b]--> S-Video modification:[/b] no idea if ...
    paf paf November 2018 Hardware
  • Gaaaahhhghh! Christmas (Lights)Tis the season to be a grumpy old git. Its now December and as is customary in the USA, after thanks giving the decorations 'must' come out. I've …

    ... service technicians by providing circuit schematics and service manuals. Some also ... about going into the TV/Video repair trade at one time ...
    1024MAK 1024MAK December 2019 Chit chat
  • X128 keysAs you may know, the Spectrum 128 had Extend Mode, True Video, Inv Video and Graphic buttons. Are these buttons emulated on X128? If not, can anyone …

    ... 128 had Extend Mode, True Video, Inv Video and Graphic buttons. Are ...
    Spector Spector July 2001 Emulators
<1…11121314151617…34>

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