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Search Again :: Adv Search 1000 results in 0.009s
<1234567…34>
  • Converting PAL +2b to NTSC[B]Hello my fellow WoS'ers[/B] I have a strange request for your knowledge and advice. A chap in the US would like to use a Spectrum +2B, however w…

    ... RGB output is agnostic of colour carrier - however this is only ... way I could change the colour burst for the composite alongside the ...
    Zetr0 Zetr0 July 2013 Hardware
  • Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…

    ... the same sync pulse and colour burst timing. You get a nice ... on some televisions because the colour burst comes too late.

    rga24 rga24 May 2014 Hardware
  • OT: but still hardware, BBC Micro questionOff Topic, but I guess people who know hardware may be able to help. Does anyone know if it is safe to have S39 jumpered in the Beebs video circuits.…

    The link is unmade by default because including the colour burst signal causes ghosting on many monochrome monitors. Therefore, only make this link if you are plugging into a colour composite monitor.

    --
    JGH
    Jonathan Harston Jonathan Harston November 2005 Hardware
  • No colourHi! I'm trying to fix a 6A 48K machine that outputs no colour and shows the characters as if they were in bold. So far, I've done a couple of thing…

    ... going pulse followed by a burst of 4.43MHz subcarrier then ... 64uSec).

    If the colour burst is not present then this ... bad generation of a correct colour signal.
    IN31 IN31 April 2008 Hardware
  • Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…

    ... MHz crystal produces the NTSC colour burst component.

    So basically ...
    csmith csmith April 2009 Hardware
  • Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…

    ... NTSC, 14MHz for PAL), correct colour burst clock and correct video signal ...
    Fred Fred April 2009 Hardware
  • Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…

    ... NTSC, 14MHz for PAL), correct colour burst clock and correct video signal ...
    superfo superfo April 2009 Hardware
  • Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…

    ... ]

    The ULA is colour-encoder agnostic. It just supplies ... YUV colour difference signals containing a number ... to generate, not how the colour burst is encoded.
    csmith csmith April 2009 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... alters the timing of the colour burst signal, and
    improves the ...
    Cignale Cignale July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... alters the timing of the colour burst signal, and
    improves the ...
    Cignale Cignale July 2010 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... a 60hz Vertical and NTSC colour bust (3.579545 MHz ) based ... they can re-encode the colour burst to PAL 4.43361875 MHz ...
    Zetr0 Zetr0 March 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... they can re-encode the colour burst to PAL 4.43361875 MHz ...
    guesser guesser March 2011 Hardware
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... and VGA are agnostic towards colour burst carriers like PAL / NTSC. velesofts ...
    Zetr0 Zetr0 May 2011 Hardware
  • Spectrum Emulator that supports low resolutions and runs smoothlyHello to All, I have been trying to find a spectrum emulator that will work well through my CRT TV (using RGB to Scart) Most emulators seem to supp…

    ... , because it will overlap the colour burst.
    Lets work this out ...
    csmith csmith July 2012 Emulators
  • Spectrum Emulator that supports low resolutions and runs smoothlyHello to All, I have been trying to find a spectrum emulator that will work well through my CRT TV (using RGB to Scart) Most emulators seem to supp…

    ... , because it will overlap the colour burst.
    Lets work this out ...
    guesser guesser July 2012 Emulators
  • Black and white composite displayJust pulled out an old CRT display and tried my trusty rubber key on it (comp modded), im using one of those scart adapters for an xbox to accept the…

    ... are also correct that the colour information is transmitted by ... (so how "loud" the colour subcarrier is) encodes our saturation ... what is called a [I]colour burst[/I]. This is a brief ... (2.25 microseconds) burst of the colour subcarrier at a known ...
    guesser guesser April 2013 Hardware
  • zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.

    ... 6C001E was introduces to enhance colour burst signal. Some TV models were ...
    Pierre Pierre October 2013 Hardware
  • Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…

    ... altered the timing of the colour burst component of the video signal ...
    balford balford November 2013 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... -6: Lower power version, alters colour burst timing for increased compatibility with ...
    balford balford March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... -6: Lower power version, alters colour burst timing for increased compatibility with ...
    bverstee bverstee March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... is just lower power with colour burst changes.

    I've ... fine apart from the usual colour smearing. I did swap it ...
    balford balford March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... -5 include the change to colour burst timing of the 6C001E-6 ...
    zub zub March 2014 Hardware
  • ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…

    ... during black level (when the colour burst appears) and found it was ...
    rga24 rga24 April 2014 Hardware
  • Why was the Speccy screen displaced?Okay, so maybe this has been discussed before but no idea what search terms to look for. I just watched a YouTube video of someone filiming himself …

    ... was moved so that the colour burst would start earlier on the ... have been to move the colour burst earlier on the back porch ... this; a glitch in the colour burst would have been much less ...
    rga24 rga24 May 2014 Sinclair Miscellaneous
  • 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 …

    ... appear to expect a PAL colour burst signal to be present on ...
    Fruitcake Fruitcake May 2014 Hardware
  • ULAAre ULA's (for Spectrum 48k's) interchangeable through the different issues? To give some background, to work out what was wrong with an old speccy I…

    ... -6: Lower power version, alters colour burst timing for increased compatibility with ...
    balford balford September 2015 Hardware
  • 48K colour issuesGentlemen, A friend handed me over a number of 48K machines to service, and among these there are four of them with various flavours of colour iss…

    ... trace with the clearly visible colour burst, there is a very low ... , and this hides completely the colour burst. I forgot to tell that ...
    Opus Discovery Opus Discovery September 2015 Hardware
  • 50 Hz / 60 Hz switch in Timex Computer 2068I'm not sure if this is common knowledge, I've certainly never read about it online, though it may be documented in Portuguese or Polish. There is a…

    ... refers to the PAL colour television system, even though ... SCLD includes NTSC colour encoding in its colour difference signals, ... they include an NTSC colour burst. They are designed for ... an LM1889 colour encoder directly, which takes colour difference signals. ...
    rga24 rga24 October 2017 Hardware
  • 5C Horizontal timing vs 6C horizontal timing.Hi all, Just considering the timing difference in the video signal between the 5C and the 6C where the 6C ULA seems to have 50% longer horizontal …

    ... />
    The timing of the colour burst part of the video signal ... are to do with the colour mixing done by IC14 (LM1889 ...
    1024MAK 1024MAK October 2021 Hardware
  • 5C Horizontal timing vs 6C horizontal timing.Hi all, Just considering the timing difference in the video signal between the 5C and the 6C where the 6C ULA seems to have 50% longer horizontal …

    ... />
    The timing of the colour burst part of the video signal ...
    cj7hawk cj7hawk October 2021 Hardware
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