Posted By
Richard42
on 2012-05-22
11:08:46
|  Re: PAL/NTSC switch
I have a couple of tape games (Powerball and Speed King) which require PAL, so I used these for testing.
Another tricky thing is converting the CVBS or SVideo signal to VGA. I have several cheap ($40-50) converters which can take both PAL and NTSC. One of them won't sync to the video output of the plus/4 at all (because it's really not that close to spec when you look at it with a scope), and the other one has a lot of noise. I just ordered a more expensive converter (startech.com VID2VGATV2). Hopefully that one will give a better picture. The best picture that I have seen comes from hooking it up to a regular old CRT TV, but of course (in the US) mine won't take PAL, and I don't have room for more big heavy CRTs.
I've also ordered some 27C256 EPROMs, and I'm going to re-do the kernel ROM hack to use the single chip, so that my case will close without bending the PC board.
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