RGB The Apple IIc and Mac's also use 15p cables. Any chance all three are compatible? John A.

At 02:05 PM 8/5/2001 -0700, Mike Ford wrote: The RGB video specs for the Mac, IIgs, //c, //e and /// series machines are all different. So RGB cables and RGB monitors designed for one series do not work on any of the others. There is an esoteric exception, which is that a RGB IIgs monitor will display RGB output from a ///. However, the colors are reversed. I don't think I've ever seen a //c hooked to a RGB monitor, so I've never learned what's required. IIRC, the RGB specs for the //e, //c, IIgs, and /// series were all variations on an odd analog RGB system designed by Apple. I believe that starting with the color Macs, they embraced a more traditional, but still proprietary, digital TTL spec. I welcome and encourage any corrections. Arthur Clark

Which is why it's a fairly simple cable change to go between the two as long as the monitor sense line is taken into account. There are certainly enough adapters from various manufacturers out there made to do just that, going both directions. Jeff -- Home of the TRS-80 Model 2000 FAQ File http://www.cchaven.com http://www.geocities.com/siliconvalley/lakes/6757