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<1234567…34>
  • 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…

    ... />
    There is a 50 Hz / 60 Hz mode switch in the Timex ... nothing to do with the 50 Hz / 60 Hz mode; that is simply ... SCLD pin which controls 50 Hz or 60 Hz mode selection. The default ... connected; this gives you normal 50 Hz PAL operation. Connect the jumper ...
    rga24 rga24 July 2013 Hardware
  • Need help from people with CRT TVs (50 Hz)I’m wrapping up the development of my [url="https://www.worldofspectrum.org/forums/discussion/54152/new-game-a-yankee-in-iraq-2017-a-shoot-em-up"]gam…

    ... the good-old 60 Hz vs 50 Hz LCD/CRT problem raises ... />
    1—every field (50 Hz)
    2—every other field ... (25 Hz)
    3—every third ... field (17 Hz)

    Now, ... this is to a real 50 Hz CRT TV). Option 2 ...
    Ast_A_Moore Ast_A_Moore March 2017 Development
  • The quest for true 50 HzAfter experimenting with interframe blending on Sinclairean, I wonder if someone has ever managed to get a custom Spectrum-friendly 50 (or better, 50…

    ... a custom Spectrum-friendly 50 (or better, 50.08!) Hz video mode on ...
    Madonna Mk 2 Madonna Mk 2 April 2010 Emulators
  • damn 60 HzYou know I am really glad that ZX Spectrum is 50 Hz only. Not only the games always run in correct speed (unline Atari, Commodore, Sega, Nintendo...)…

    ... glad that ZX Spectrum is 50 Hz only. Not only the ... PAL CRT TVs handle the 50 Hz signal without issues which is ... Philips 14PT1354 is stable at 50 Hz but a bit shaky ... the fact is that 60 Hz picture is less crisp ... even when they support 60 Hz on the paper, are not ...
    maiki maiki January 2016 Chit chat
  • Timing... in the CSS faqI was looking at the CSS faq for something completely unrelated and noticed: [quote] Then the 192 screen+border lines are displayed, followed by 56 …

    ... long, which means that the '50 Hz' interrupt is actually a 3 ... .5MHz/69888=50.08 Hz interrupt. This fact can ...
    Winston Winston 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…

    ...
    [*]Smooth screen updates and 50 Hz conversion
    [/LIST]
    The ... frequency is different from 60 Hz
    [*]Only a generic Trinitron ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…

    ... on your TV. So 50 frames per second (50 hz), actually means 25 ...
    RMartins RMartins August 2015 Development
  • TZX/Taper headachesI've been doing a stocktake of all my Spectrum stuff, most of which I bought in a job lot a few years back, and there's a whole load of covertapes in…

    ... , surprise surprise, that's a 50 Hz mains signal, but it disappears ...
    The Mighty Dopethrone The Mighty Dopethrone December 2017 Games
  • CRT VGA monitor: 640x480@50Hz is possible?Anyone knows or has any information regarding a particular brand/model of VGA monitor capable of attaining such screen resolution at 50 Hz vertical r…

    Anyone knows or has any information regarding a particular brand/model of VGA monitor capable of attaining such screen resolution at 50 Hz vertical refresh rate? :-?
    Renegade Renegade August 2019 Hardware
  • Speed-up tool Pac Speed Tweaker for zx Pac-Man emulatorHello, The zx pacman emulator by Simon Owen is running at 83% of the arcade version speed. . It's because the game is rendered at 50 Hz (50.01Hz…

    ... the game is rendered at 50 Hz (50.01Hz exactly on the zx ...
    4Ocrisis 4Ocrisis February 2022 Games
  • Confounded modern thingsIt appears the server instability has left a gap in the forums listing so I'll post this again. Given a complete lack of anything on the projects pa…

    ... 't have to keep a 50 Hz screen update in that kind ...
    Anonymous Anonymous December 2001 Games
  • Your favourite machine apart from The SpectrumI've asked this on a couple of other sites, so now it's time to ask it here: what is your favourite machine, forgetting about the Speccy? For me, it'…

    ... single Spectrum game that had 50 Hz full screen scrolling or moving ... was "only" updated at 25 Hz.

    Most games developed ...
    Anonymous Anonymous November 2001 Games
  • Your favourite machine apart from The SpectrumI've asked this on a couple of other sites, so now it's time to ask it here: what is your favourite machine, forgetting about the Speccy? For me, it'…

    ... pixel at a time at 50 Hz, then the game would chop ... 8 pixels a time at 50 Hz. The alternative that most speccy ... times per second (i.e. 50 / 8 = 6.25). At such ...
    Anonymous Anonymous November 2001 Games
  • AY 8912 QuestionI got some problem... Does anyone have a formula to convert from Hz / kHz to the Pitch value of AY Sounchip of Spectrum? Please help...

    Thanx, I got it! The formula is; pitch=1760000/(hz*16). The Oscilator frequency of AY in Spectrum is 1.76 Mhz (half of CPU clock)... So the Pitch for a 50 Hz tone is 2200
    LCD LCD July 2002 Sinclair Miscellaneous
  • Connecting a PC's VGA monitor to speccy's RGB...I've searched the entire web for this... can anyone help me? I want to talk with my speccy...

    ... 15 KHz horizontal sync and 50 Hz vertical... hasn't this circuit ...
    unoesis unoesis May 2004 Sinclair Miscellaneous
  • Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …

    ... generate the cpu clock and 50/60Hz vertical blanking interrupt.
    (there are 50 frames per second in Europe ... 60 Hz (cycles per second),
    these programs must replace 50 by ... original wall wart designed for 50 Hz.


    [ This ...
    Alcoholics Anonymous Alcoholics Anonymous November 2004 Sinclair Miscellaneous
  • Determining 50hz/60hz in softwareHow can you determine in software if you are running at 50hz or 60hz?

    ... what it will return 60/50 Hz

    Then in inrtupt ...
    Dr BEEP Dr BEEP March 2006 Development
  • Determining 50hz/60hz in softwareHow can you determine in software if you are running at 50hz or 60hz?

    ... -Blanks (interrupts). Longer time - 50 Hz, shorter - 60 Hz, assuming that CPU clocks ...
    piters piters March 2006 Development
  • Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…

    ... same as a 128k spectrum (50 Hz most important). Spectrum tunes are ... 60Hz(Atari ST) and Manual(Hz) of 1764750 when composing. You ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Games
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... , which is [B]50 Hz[/B] vertical, [B]15625 Hz[/B] horizontal. Don ...
    Marcelo Marcelo April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... , which is [B]50 Hz[/B] vertical, [B]15625 Hz[/B] horizontal. Don ...
    piters piters April 2007 Hardware
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... multiplies the Sync Frequencies (15625 Hz / 50 Hz, I think), or does it ...
    Marcelo Marcelo August 2007 Sinclair Miscellaneous
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... multiplies the Sync Frequencies (15625 Hz / 50 Hz, I think), or does it ...
    Gods Gods August 2007 Sinclair Miscellaneous
  • Very noob question re +3First things first, ive never owned any Sinclair equipment until last week. I have used Amstrads, Atari, Commodore etc, but not a Sinclair! So, apolo…

    As it can use both 50 Hz and 60 Hz frame rate, I think that it can display both PAL and NTSC.

    See this link for some info and specs on different models:
    [URL]http://www.amiga-hardware.com/showhardware.cgi?HARDID=849[/URL]
    Pilsener Pilsener August 2007 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?…

    ... what you get is identical 50 frames per second. This is ... />
    ZX is synced to 50 Hz interrupt and the interrupt is ... synced to 50 Hz monitor refresh, correct? If this ...
    omega omega October 2007 Emulators
  • 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?…

    [QUOTE=Tom-Cat;223795]Unfortunetly none of the ZX windows emulators support this :([/QUOTE]

    If you could get Fuse for Windows to sync to 50 Hz, then be my guest! :)
    zub zub October 2007 Emulators
  • 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?…

    [quote=zub;223929]If you could get Fuse for Windows to sync to 50 Hz, then be my guest! :)[/quote]
    What about syncing it to "any" monitor interrupt? OK, emulation will be faster. I can live with that.
    omega omega October 2007 Emulators
  • 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?…

    ... why not. Certainly at 100 Hz, you could sync to every ... other frame, and at 60 Hz, you could emulate the TS2068 ... could just run an emulated "50 Hz" machine faster than normal, or ...
    zub zub October 2007 Emulators
<1234567…34>

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  • The quest for true 50 HzAfter experimenting with interframe blending on Sinclairean, I wonder if someone has ever managed to get a custom Spectrum-friendly 50 (or better, 50…
  • Need help from people with CRT TVs (50 Hz)I’m wrapping up the development of my [url="https://www.worldofspectrum.org/forums/discussion/54152/new-game-a-yankee-in-iraq-2017-a-shoot-em-up"]gam…
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