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  • 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…

    ... /> frame length 0xe700 is 59136 tstates
    CPU speed = 14.110MHz ... / 59136 = 59.65Hz
    224 tstates/line = 264 lines[/QUOTE]
    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…

    ... that each frame is 59136 tstates long, and given the CPU ... on the Spectrum is 224 tstates, there are 264 lines in ... a frame length of 58688 tstates, runs at 60.11Hz and ...
    zxbruno zxbruno 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…

    ... needs to be called 69355 tstates after the interrupt. This presents ...
    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…

    ... needs to be called 69355 tstates after the interrupt. This presents ... to be called ( 69888 - 69355 ) tstates before the interrupt.
    Philip Kendall Philip Kendall 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…

    ... TS2068 flashes faster than the 50Hz Spectrums every 16/60 = 0 ...
    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…

    ... TS2068 flashes faster than the 50Hz Spectrums every 16/60 = 0 ...
    Jimmy Jimmy April 2009 Hardware
  • Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....

    ... what the Amiga did at 50Hz, but it could have been ...
    joefish joefish May 2009 Chit chat
  • Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....

    ... what the Amiga did at 50Hz, but it could have been ... do much the same at 50Hz on the ST, you might ...
    Matt_B Matt_B May 2009 Chit chat
  • Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....

    ... you press '0' to switch 50Hz/60Hz mode too.

    joefish joefish May 2009 Chit chat
  • Maze Mania - How did they do it?Hi, I was looking at the game "Maze Mania" by Hewson Consultants, written in 1989. The game can be downloaded from here [URL]http://www.worldofspec…

    ... it takes most of two 50Hz frames to do it. You ...
    joefish joefish May 2009 Development
  • Using a Spectrum in JapanHi all, at the moment I have a 48k Spectrum on its way (with a LOT of other stuff) to Japan where I intend to use it. So I have some fairly straight…

    ... the vertical hold for a 50Hz signal (though it's in ...
    MagicKnight MagicKnight May 2009 Hardware
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... like trying to do a 50Hz update with a virtual processor ...
    joefish joefish May 2009 New game ideas
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... like trying to do a 50Hz update with a virtual processor ... need to run it on 50Hz ? 25Hz or 17Hz will be ...
    Fikee Fikee May 2009 New game ideas
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... need to run it on 50Hz ? 25Hz or 17Hz will be ... have to render multicolour picture @50hz). The original is coded to ... work on 50hz interlaced mode, I guess I ...
    Arda Arda May 2009 New game ideas
  • Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…

    ... deep), but tracking pc in 50hz looks like a unusable feature ...
    Arda Arda May 2009 Emulators
  • Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…

    ... deep), but tracking pc in 50hz looks like a unusable feature ...
    rich_chandler rich_chandler May 2009 Emulators
  • Ashes To AshesI really enjoyed that. What a weird ending. Can't wait to find out what that was all about. [spoiler]Who was the guy that drugged Alex and what was …

    ... . It should have been the 50hz purring one, not the modern ...
    Winston Winston May 2009 Chit chat
  • Ashes To AshesI really enjoyed that. What a weird ending. Can't wait to find out what that was all about. [spoiler]Who was the guy that drugged Alex and what was …

    ... . It should have been the 50hz purring one, not the modern ...
    murtceps murtceps May 2009 Chit chat
  • Pera Putnik's RGB interfaceI am sure some (if not many) of you will have seen Pera Putnik's RGB interface [URL="http://members.tripod.com/%7Epiters/uvyrgb.htm"]circuit diagram…

    ... 60Hz while you will get 50Hz from the ULA.
    Living ... thing is that converting from 50Hz to 60Hz will change the ...
    ingo ingo May 2009 Hardware
  • Sinclair Light Gun and modern tellies/monitorsDoes the Sinclair Light Gun work with modern LCD/TFT/plasma screens? I have my Speccy linked up by TV card to a PC outputting to a LCD monitor, and …

    ... 'll only work with a 50Hz CRT. They work by watching ...
    joefish joefish June 2009 Sinclair Miscellaneous
  • DVD regions, why?Why do we have to put up with DVD region encoding? I mean, I know why they were invented (so the DVD companies could control the market, and incident…

    ... / 60Hz instead of 625 lines / 50Hz - pretty much all PAL TVs ...
    Winston Winston July 2009 Chit chat
  • Rom Loader questionI want to generate a wav file from a tap file that will load in a Spectrum, so I've had a look at the [URL=http://www.worldofspectrum.org/ldbytes.htm…

    Almost. The sync pulse is just one edge of 667 tstates followed by one edge of 735 tstates, not two of each.
    Philip Kendall Philip Kendall July 2009 Development
  • Question about ZX Spectrum AY interfacesI got this information from Mike, author of EigthyOne: [QUOTE]128k spectrum 1.7734 MHz Timex 1.764 MHz ZON-X 1.625 MHz Fuller 1.625 MHz QuickSilva 0…

    ... chiptune will run off a 50Hz interrupt and take up a ... suppose you could fake a 50Hz interrupt with fiddly delay loops ...
    gasman gasman July 2009 Hardware
  • Question about ZX Spectrum AY interfacesI got this information from Mike, author of EigthyOne: [QUOTE]128k spectrum 1.7734 MHz Timex 1.764 MHz ZON-X 1.625 MHz Fuller 1.625 MHz QuickSilva 0…

    ... chiptune will run off a 50Hz interrupt...[/QUOTE]

    Good ... has some experience in making 50Hz tunes play correctly on 60Hz ...
    chev chev July 2009 Hardware
  • Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …

    ... the sinclair; in 240c AC 50Hz, out 9v DC at 1 ...
    josteint josteint July 2009 Hardware
  • Spectrum+3 to 9pin VGA (EIZO 8060s)[img]http://pspemulation2.condor.serverpro3.com/screenshots/ZX+3-to-9pin-VGA(eizo).jpg[/img] [img]http://pspemulation2.condor.serverpro3.com/screen…

    9-pin video-in is not VGA but EGA-input. And EGA uses 15kHz/50Hz.

    Greets Ingo.
    ingo ingo July 2009 Hardware
  • Spectrum+3 to 9pin VGA (EIZO 8060s)[img]http://pspemulation2.condor.serverpro3.com/screenshots/ZX+3-to-9pin-VGA(eizo).jpg[/img] [img]http://pspemulation2.condor.serverpro3.com/screen…

    ... -input. And EGA uses 15kHz/50Hz.

    Greets Ingo.[/QUOTE ...
    Anemos Anemos July 2009 Hardware
  • wavide: WAV player for DivIDEPrompted by an email from zxbruno yesterday, cobbled together much quicker than expected... [url]ftp://ftp.untergrund.net/users/gasman/zx/wavide/[/u…

    ... a sample exactly every 49 tstates, regardless of whether it's ...
    gasman gasman August 2009 Announcements
  • Some DVD and film questions1. You know how some DVDs are region free (either because they are released that way, or because they are copies of region protected DVDs that have h…

    ... significant viewer advantage over a 50Hz TV screen (does it?), but ...
    PAL DVD - 720x576, 25fps, 50hz

    Apart from the ...
    The Starglider The Starglider August 2009 Chit chat
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... a monitor to run at 50Hz, and/or throw in some ...
    gasman gasman August 2009 Development
<1…11121314151617…34>

Latest Posts

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    harriusherbartio on 11:01AM
  • I am currently watching.....
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  • New video about S-video modification on Issue two 48K Spectrum.
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    harriusherbartio on April 21
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