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Posted By

Richard42
on 2012-05-01
23:46:41

Re: PAL/NTSC switch

Thanks for the link; that was helpful. My mod is going to require the extra crystal and eprom, but I'm just going to stack 2 eproms on top of each other rather than wiring up that extra board.

Posted By

Csabo
on 2012-05-01
21:33:34

Re: PAL/NTSC switch

This topic came up last year (just linking it in case you see something informative in there):
http://plus4world.powweb.com/forum/21354

I'm no hardware guru by any means, so I would never dream of building something like this myself. But... if it's not too much trouble though, I'd like to see the instructions... Just for completeness sake, you never know when someone else might want to do it.

Posted By

Richard42
on 2012-05-01
14:27:53

PAL/NTSC switch

I've ordered parts and plan to mod my plus/4 to add a PAL/NTSC switch, to select the video format at startup. I decided to do this because some software that I want to run (Logo) only runs under NTSC, while other software (games) only run under PAL. I think it can be done with only a DPDT switch, a crystal, and a couple of 27C128 EPROMs.

Does anyone else have interest in this mod? If so, I can post instructions. If not, I won't bother.