Re: AE RGB Option ---> Mac Monitor

[carrk@pilotc.msu.edu (Kevin M. Carr)]

In article <dempson-0308961819040001@dempson.actrix.gen.nz>,
dempson@actrix.gen.nz (David Empson) wrote:

> In article <3200c95b.40103418@news.concentric.net>, wernst@cris.com
> (Warren "Llama" Ernst) wrote:
> 
> >dempson@actrix.gen.nz (David Empson) wrote:
> >
> >>In addition to that: the RamWorks RGB option expects a digital RGB monitor
> >>(the equivalent of a CGA monitor on the PC), while the IIgs, Mac, and
> >>VGA/SVGA monitors are all analog RGB.
> >
> >Hold on, hold on. Later versions of the RGB add-on card for RamWorks
> >had BOTH analog and digital RGB connectors - one for "PC RGB Monitors"
> >and one for "Apple RGB Monitors."
> 
> I wasn't aware of any such option.
> 
> Unless it was released after the IIgs (late 1986), I would still expect it
> to be digital RGB.  Almost all RGB monitors for the Apple ///, Apple //e
> and Apple //c are digital RGB.  As far as I know, the only analog RGB
> options are with a Second Sight Card (IIgs or VGA monitor) or a Video
> Overlay Card (IIgs monitor).
> 
> The Apple /// was the first Apple computer to support RGB (unless there
> was a third-party card for the ][+ which supports RGB), and it only
> supports digital RGB.  Its video port pinout is the basis for the IIgs and
> Mac video ports, but they are not fully compatible.
> 
> I would expect the adaptor to simply provide the correct pinout for
> Apple's digital RGB monitor.
> 
> -- 
> David Empson
> dempson@actrix.gen.nz
> Snail Mail: P.O. Box 27-103, Wellington, New Zealand

David,

There was indeed a daughter card for the RamWorks III which supported both
digital (CGA) _and_ analog RGB output.  I have one in my //e at home. 
(Unfortunatly my slush fund is depleted so I don't actually have an RGB
monitor to connect to it.)  As Mitch Spector noted in another post, it is
called the 'ColorLink RGB Option.'  I don't have any of the data with me
but if you like, I could check when I get home as to the year of
manufacture and other technical details.

As to the original question of this thread, even with its analog output,
this card could not support the higher sync rates of Mac or modern PC
monitors.  (Note: I should say that I am almost, 100% positive of this
statment but have no technical documents on hand to back up this claim.)

-- 
Kevin M. Carr
Research Assistant
Department of Biochemistry
Michigan State University