Amiga TV Out
trixter at oldskool.org
Wed Nov 28 00:41:36 CST 2007
Rod Smallwood wrote:
> I'm sure that I heard that some Commodore systems could do TV out
Composite only, but yes. You could get better results with a "genlock"
device; a few of them supported Y/C ("s-video").
I produced a DVD last year with footage of running Amiga programs and I
had to resort to scan-converting the RGB port itself to get acceptable
quality. My signal path was RGB port->vga adapter->R/G/B/H/V breakout
cable->scan converter->Y/Cr/Cb output->Y/Cr/Cb video capture card. That
sounds heinous, but the scan converter and the video capture card were
very high-end broadcast-quality units (scan converter was RGB Spectrum
Videolink 1650x; capture card was Black Magic Designs Decklink SP) and
there were really only two generational losses (RGB->scan converter and
scan converter->capture card). The quality from this process was an
order of magnitude better than the A500 and A4000's composite video
> and were in fact used to produce CGI stuff for 'Babylon Five"
That was a NewTek Video Toaster, not a stock Amiga :-) The Video
Toaster hardware had it's own set of video output ports, IIRC, although
I could be wrong as I've never used one.
> Does anybody know which ones and could they do PAL or just NTSC?
All models except the A4000 (and maybe the A3000, but I'm not sure) were
made in NTSC or PAL specific versions, with a different color generator
and crystal to match. The A4000 had a jumper on the motherboard that
selected either NTSC or PAL timings.
You could get any model to "emulate" the other by using free utilities
like Degrader, but these only affected the RGB video output timing. I
used Degrader extensively on my NTSC A1200 to get European PAL games to
run, since they required a 50Hz display, but that didn't affect the
composite video output port, which was still NTSC (although it output
some quasi-NTSC-50-gibberish when running in "pal" mode).
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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