Re: Digital Prism cable

[dempson@actrix.gen.nz (David Empson)]

Wayne Stewart <waynes@intergate.bc.ca> wrote:

> I've got an Applied Engineering Digital Prism RGB card in 
> my IIe. I'd like to use it with an Apple IIgs RGB monitor 
> but I lack the cable between the card and the monitor cable.

I don't think this will work.  "Digital Prism" implies that this card
works with a digital RGB monitor.  The IIgs monitor is analog RGB.

Digital RGB was used on the Apple III, and on the PC for CGA monitors
(also EGA, which use 64-bit digital, compared to 16-bit for CGA and the
Apple III).

The IIgs, Atari ST, Amiga, Mac and IBM's VGA all use analog RGB.  (The
first three use TV scan frequencies and the last two are higher
frequency; the two groups are nearly always incompatible with each
other.)

Various cards for the IIe and adaptors for the IIc support digital RGB.
Some later cards/adaptors support analog RGB (IIgs/Atari/Amiga
monitors).

I don't know of this particular card by name, so I might be wrong about
it supporting digital RGB.  Does anyone else out there know for sure?
 
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand