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From: feinberg@acsu.Buffalo.EDU (john a feinberg)
Newsgroups: comp.sys.cbm
Subject: Re: Connecting an RGB monitor to the C64?
Message-ID: <29483@eerie.acsu.Buffalo.EDU>
Date: 28 Jun 90 00:16:43 GMT
References: <13954.2688d8f5@max.u.washington.edu>
Sender: news@acsu.Buffalo.EDU
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I'm afraid you can't connect an RGB monitor to a c64...
The extra pin you are talking about on the 64c isn't really extra, since all
c64 computers have it.  Commodore computers have separate chroma and luma out
jacks; a few monitors out there have separate chroma and luma inputs.  Although
this method isn't quite as good as RGB, it gives you a picture with at least
double the resolution and ten times the stability of a tv picture.  Many c64
monitor cables splice the chroma and luma output pins together to get a single
composite line, which can then be plugged into generic monitors or VCRs or 
things like that.  Tell your friend to buy a Commodore monitor!  :)  Mine's 6
years old, and it'll beat the pants of the best tv on the market, if hooked up
to a decent LD player (it can actually be done)

John Feinberg
SUNY Buffalo