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<1234567…34>
  • Two new spectrums arrived. One no video.Got a +2 and a Toastrack arrived today. Toastrack was actually in good condition, little wear, though a little dirty. Worked well on first power up, …

    ... can't even get video sync, and the video modulator is gone and ... hard since there's no video. Will put it aside until ...
    cj7hawk cj7hawk September 2021 Hardware
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ...
    [*]Quick'n'dirty audio/video sync; you may experience audio glitches ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • Spectrum AV Lead?I own a Specci +2a and someone kindly made me a scart lead many moons ago. Now I want to use my specci with a Commodore 1084 monitor which only has A…

    ... cable using an LM1881 chip (video sync seperator) to give you an ...
    KeepGood KeepGood December 2005 Hardware
  • 50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…

    ... You can either sync to audio or to video, but not ... are both in perfect sync (and perfect means driven ... or you can force the video sync (which you normally can' ... extra frames in the video (if you sync to audio) or ... the audio (if you sync to video). Even if this ...
    Patrik Rak Patrik Rak October 2007 Emulators
  • ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …

    ... that down by simplifying the video sync back to the cheat employed ... finish prototyping/test the composite video driver and cassette IO interface ...
    csmith csmith July 2008 Hardware
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... enable vsync
    [*]Better audio/video sync (works perfect on my LG ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... , I use a barebones audio/video sync algorithm that simply drops PC ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... Interframe blending uses video sync instead of audio sync like on previous versions ...
    Please check that your video drivers are suitable, up to ... is NOT disabled on the video card preferences.

    video card/driver does not ...
    Madonna Mk 2 Madonna Mk 2 April 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... I presume it's a video card/driver/preferences problem.
    video sync methods than pure vsync (no ... display gets rendered out of sync, chopped, teared :(
    Madonna Mk 2 Madonna Mk 2 April 2010 Emulators
  • Things I'd ask Chris Smith if he would give an interview about his book and researchGiven your current knowledge about the ULA interns, knowing what technology was capable to do those days, and knowing what people then and now would …

    ... , everything would be synchronous, proper video sync, cheaper faster memory would allow ...
    csmith csmith August 2010 Hardware
  • Things I'd ask Chris Smith if he would give an interview about his book and researchGiven your current knowledge about the ULA interns, knowing what technology was capable to do those days, and knowing what people then and now would …

    ... , everything would be synchronous, proper video sync, cheaper faster memory would allow ...
    mcleod_ideafix mcleod_ideafix August 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…

    ... changed the timing of one video sync signal (IIRC) and needed matching ...
    Patrik Rak Patrik Rak October 2010 Hardware
  • So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…

    ... />
    That's down to video timings. The original Speccy has ... second clock to generate the video sync because 3.5Mhz doesn't ... clock that generates the right video sync for NTSC and the 128s ... clock that generates the right video sync for PAL.

    [ ...
    chev chev April 2011 Sinclair Miscellaneous
  • 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…

    ... "break"!

    Incidentally, what video sync version made it onto the ...
    csmith csmith February 2012 Hardware
  • Spectrum +3 into a Microvitec CUB 452 MonitorSo nearly had this working! Had a lead made up for me that should have worked but the wiring was a bit off, after a bit of messing around and search…

    looks to me like you need a video sync separator, sucj as the LM1881 [url]http://www.gamesx.com/misctech/lm1881.htm[/url] since as the monitor is expexting separate vertical and horizontal syncs but the zpeccy only output composite sync

    HTH
    andy_rea andy_rea May 2012 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... the video signals that are only present on the 48K for sync ... you could use the video sync from the composite video and still have ... short lead and obtain the sync from that, it just wouldn ...
    Winston Winston August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... luminance signal to get the video sync, you will have to take ... .
    2. Have an alternative sync mechanism. For 128K users, provide ... syncs to the Spectrum's video. This will likely require fewer ... to support 128K machines, a video interface also has to take ...
    Winston Winston October 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... luminance signal to get the video sync, you will have to take ... .
    2. Have an alternative sync mechanism. For 128K users, provide ... syncs to the Spectrum's video. This will likely require fewer ... to support 128K machines, a video interface also has to take ...
    BloodBaz BloodBaz October 2012 Sinclair Miscellaneous
  • ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…

    ... be able to fix the video sync problem but I have a ...
    JohnH JohnH November 2012 Hardware
  • Video output questions...Two questions... [QUOTE]1. The yellow and blue colours seem out of phase on the display. Is this normal for an RF connection to the TV/monitor?[/QUO…

    ... has nothing to do with sync. If this is working, you ... do with pin 20 (composite video & sync), some modern LCD TV ... seem to be able to sync with some, retro Computer, and ...
    Crimbo Crimbo February 2013 Hardware
  • Has anybody used any of the following hardware?I have a DK?Tronics light pen and a RAM Music machine for the Spectrum. I have them now for quite a while, but I have never connected them to a Spect…

    ... pen. The type where the video hardware supports light pens and ... Sinclair ULA to generate the video display and the ULA does ... timing the difference between the video sync signals and the response from ...
    1024MAK 1024MAK April 2013 Hardware
  • ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…

    ... lines of how negative going video sync's can be 'taken' from ... they were, to the amplified video part.
    I have no ...
    roko roko June 2014 Hardware
  • ZXMAK2Hi everyone, I'm glad to present you the latest version of my emulator - ZXMAK2 :) There are a lot of changes were made since the last topic about t…

    ... menu (added menu "Frame Sync Source" and "Video Filter");
    - reduce CPU ... next release :smile:

    Video Sync works much better now (better ... . So, on 60 Hz display Video Sync will get a small jerks ...
    ZXMAK ZXMAK January 2015 Emulators
  • Speccy vs PiI've been doing some side by side comparisons on emulation (rpi) vs actual speccy (48k+). And I'm really impressed with what Fuse can do when the pi …

    ... be a problem with the video sync , because the emulator uses its ... because the emulator resizes the video driver to fill the display ... driver)
    Try the recommended video settings for rpi:
    ./zesarux ...
    chernandezba chernandezba April 2016 Emulators
  • Spectrum +2 various problemsHey there, I just recently acquired a Spectrum +2 and it's got various problems with it. First off, I get a rolling picture through both RGB and comp…

    ... cable is wired for c-sync or composite video sync.
    mityay mityay October 2016 Hardware
  • Sinclair ZX Spectrum 128My loving mum has brought me back one of these beauties from a carboot sale but I'm haven a slight problem with it I CAN'T FIND THE ON SWITCH!!!!!…

    ... the audio signal from the video sync signal - [improves the RGB picture ...
    murtceps murtceps November 2016 Sinclair Miscellaneous
  • ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …

    ... had no proper clock or video signals using 74HC175 as 2 ... he has some issues with video sync
    - Zipp firstly used ... U39 !!!) but this caused some video sync issues and he had to ... . And his screenshots shows good video quality.
    - I build ...
    screemer screemer June 2017 Hardware
  • Harlequin video problemsHi everyone at the forums, this is my first post here, so forgive me if I don't post this at the right place. I hope that you can help me. I buil…

    ... /> the problem is related to video sync. replacing the 4.433619 crystal ...
    megariffer megariffer January 2018 Hardware
  • RGB SCART Lead for +3 Spectrum. Picture issues. (Fades to Black, Rolling, Sync Issues)Hi there, I recently ordered a Sinclair Spectrum 128 +2 & +3 RGB Scart Cable (Ean13: 0705693506845) from coolnovelties.co.uk to use my Sinclair Spect…

    ... website "Power requirements for (CSYNC) video sync separator"
    It's trying ... depend how much current the sync separator draws.
    guesser guesser February 2019 Hardware
  • What is VSYNC-based sound on ZX80/81?An Z81 emulator demo with quite impressive sound has this explanation -- "manipulating the vertical sync to create sound with the TV buzz". This is …

    The TV/video sync signals are controlled by the ... at all over the sync signals, as all sync timing is done ...
    1024MAK 1024MAK April 2022 Development
<1234567…34>

Latest Posts

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