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  • 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…

    As for the horizontal resolution, the ULA book claims ... contains 352 pixels worth of video (32 pixels of left border ... the 96 pixels worth of horizontal blanking.
    According to my ...
    guesser guesser 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…

    ... =guesser;639344]As for the horizontal resolution, the ULA book claims ... contains 352 pixels worth of video (32 pixels of left border ... the 96 pixels worth of horizontal blanking.
    According to my ...
    csmith csmith July 2012 Emulators
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... mantain the original timings for video access memory. It's possible ... /> The implementetion (in theory) for horizontal scroll is delaying X cycles ... instead 256). X is the horizontal scroll offset between 0 and ...
    antoniovillena antoniovillena July 2012 Development
  • 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…

    ... generates a 312 line video signal at 50Hz and ... a total of 304 actual video lines. Some of these ... later.

    For horizontal resolution it all comes down ... 352 "pixels" worth of video which is divided up into ... now we treat the video as having 576 visible ...
    guesser guesser 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…

    ...
    The overall amount of video signal that can be generated ... addition chapter 16 [I]Analogue video[/I] explains how the ... clocks controlling the vertical and horizontal counters are delayed slightly ... the positioning of the video signal relative to the ...
    guesser guesser August 2012 Emulators
  • 128k ULA pinout?Is there someone who has a circuit diagram or pinout for the 128k (+2) ULA?

    ... main difference is in the horizontal counter, which counts up to ... PAL clock, so the composite video output would were more free ... />
    VB (pin 12) is "video bank". It's an input ... ,G,B,SYNC,BRIGHT are video output signals. They go straight ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... [/B][/SIZE]

    No video output at this moment, as ... simple TV output generator, with horizontal and vertical counters, and a ... behave as a 3-bit video DAC :)
    mcleod_ideafix mcleod_ideafix September 2012 Hardware
  • decoding loading barsI was idly pondering if it would be possible to decode the tape loading bars - just the header, say, for a standard loader, to determine the title o…

    ... and horizontal blanking intervals, where no output is made to the video ...
    Winston Winston October 2012 Sinclair Miscellaneous
  • decoding loading barsI was idly pondering if it would be possible to decode the tape loading bars - just the header, say, for a standard loader, to determine the title o…

    ... and horizontal blanking intervals, where no output is made to the video ... in the ULA).[/QUOTE]
    Horizontal retrace is not important, as ...
    ccowley ccowley October 2012 Sinclair Miscellaneous
  • Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…

    In the ZX81, ROM video routines 'execute' character data in ... time the ULA sends 8 horizontal pixels to the screen (pixel ... , so even with the simplest video logic there's usually [I ... may be able to generate video without any extra hardware. But ...
    RetroTechie RetroTechie January 2013 Chit chat
  • 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…

    ... ]horizontal sync (HSYNC)[/B] signals the beginning of each new video line ... from the floating (AC coupled) video signal.[/QUOTE] So as you ... can see, a composite video signal can be both a ...
    1024MAK 1024MAK April 2013 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…

    ... horizontal synchron signal does also work) or a positive video signal ... of SCART to the video processor inside the TV.< ... that amplifies the (composite) video signal used for synchronizing to ... with such superchip for video and synchron signal processing.< ...
    ingo ingo April 2013 Hardware
  • SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…

    Very nice video mcleod_ideafix! Great to see those ... suitable and would allow smoother horizontal animation with very little colour ...
    Fruitcake Fruitcake May 2013 Hardware
  • ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…

    ... perform a minor miracle :). That video is extremely helpful too.
    horizontal lines slowly bouncing? Power issue ...
    serene serene June 2013 Hardware
  • US Timex-Sinclair 2068 in EuropeWhilst in the States, I convinced a colleague to bid on a Timex-Sinclair 2068. We won the auction with a price much better than in Europe. Next time …

    ... .

    A composite video signal (also known as baseband ... signal plus the synchronization signals (horizontal and vertical) plus the colour ... VHS machine to watch American video tapes), in Europe most ... a 525 line 60Hz NTSC video signal on the composite ...
    1024MAK 1024MAK July 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... as subtitling over a composite video signal. Putting between 1 and ... there is no vertical and horizontal sync inputs like on a ... so that the decoded composite video is always suppressed.

    video interfacing and didn't just ...
    guesser guesser August 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... control pins, put analogue RGB video signals (of the correct ... level, and correct video system) in the composite video input pin, all ... there is no vertical and horizontal sync inputs like on a ... Spectrum computers (that have RGB video output sockets) is that the ...
    1024MAK 1024MAK August 2013 Hardware
  • Connect spectrum to monitorHello, Probably a stupid question but I'll ask it anyway :) Is there a way to connect a spectrum to a vga or dvi monitor? Thanks, Ant?nio

    ... a 625 line video signal with a line rate (horizontal) frequency of ... ]) monitors use a line rate (horizontal) frequency of 31.4686 kHz ... that you can display the video output from a ZX Spectrum ... you are using (UHF / composite video / RGB) and on the input ...
    1024MAK 1024MAK September 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... uni you can select the video line you want to look ... recognise composite sync as a video waveform and trigger off it ... composite video output as below.

    If you have separate horizontal ... and just connect the composite video out to the trigger or ...
    guesser guesser December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... started being equipped with basic video displays. "Digital" RGB just means ... wish to measure. Now the horizontal line will move up or ...
    1024MAK 1024MAK December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... started being equipped with basic video displays. "Digital" RGB just means ... wish to measure. Now the horizontal line will move up or ... 'm using RGB and composite video for the Sync.

    thomas3120 thomas3120 December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... 'm using RGB and composite video for the Sync.

    Horizontal and Vertical sync signals. You ... true for all monitors. Composite video can be used as sync ...
    pkersey pkersey December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... monitors expect is a separated Horizontal and Vertical sync signals. You ... true for all monitors. Composite video can be used as sync ... & 128k+). Both have great video though... interesting.

    I ...
    thomas3120 thomas3120 December 2013 Hardware
  • [NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…

    ... release adds two [B]special video effects[/B]: the [B]"vertical ... effect when both vertical and horizontal scanlines enabled.
    * Fixed a ...
    fms fms January 2014 Emulators
  • Canonical Spectrum pixel aspect ratioHi, Do any emulators support scaling the Spectrum image to have the "correct/canonical" pixel aspect ratio? On a 4:3 display, Spectrum pixels aren'…

    ... /56) horizontally would give a horizontal size of about 1349 pixels ... with lots of info about video standards and aspect ratios (it ... [url=http://lurkertech.com/lg/video-systems/]Programmer's Guide to ...
    mark_k mark_k January 2014 Emulators
  • 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…

    ... feed with VCC if the horizontal input is supplied with a ... vertical sync input of the video IC. Therefore one small connection ...
    ingo ingo February 2014 Hardware
  • New Game:Killer BeesI have ported one of my favourite games for the Phillips G7000 to the ZX Spectrum. Killer Bees, I spent hours playing this as a kid. The original g…

    ... by doing some mucking with horizontal retrace in the time interval ... right instant, mucked with the video controller registers in some way ... as to mess up the video signal, then undid this N ... imprecision, I positioned some other video element on top of the ...
    BobHarris BobHarris February 2014 Brand new software
<1…12131415161718…34>

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