Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!tel.inrs.CDN!sloan
From: sloan@tel.inrs.CDN (David Sloan)
Newsgroups: comp.sys.apple
Subject: RGB boards for ][e
Message-ID: <26*sloan@tel.inrs.cdn>
Date: 4 Jan 89 03:40:00 GMT
References: <6150@ecsvax.uncecs.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 12

I hope that the following helps. It is taken from the Technical Introduction 
to the Apple IIGS publication.

"At one time, Apple provided an RGB adaptor card and an RGB monitor, the
 AppleColor (TM) 100 monitor, for the Apple II. Using that system, Hi-Res
 and Double Hi-Res color displays were restricted to a horizontal resolution
 only 140, a restriction that does not apply to the Apple IIGS. Note that
 an AppleColor 100 Monitor requires separate digital signals (as opposed
 to the Analogue RGB on the IIGS), so it will not work on the Apple IIGS."

 The Sony RGB monitor is compatible with the II GS analogue RGB so that I
 don't think that the Apple RGB adaptor card would be suitable.