apple rgb monitor problems

From: Phil Beesley <pb14_at_leicester.ac.uk>
Date: Tue Nov 11 08:23:59 1997

On 10 Nov 97 at 18:15, Zane H. Healy wrote:

> >This really sounds like the monitor for an Apple IIgs. I have three
> >such monitors. (One isn't in very good shape and the other two are
> >in use.) I think there are some Macs that can use this monitor, but I'm
> >not positive. Make sure you are using analog RGB, not digital.

No standard Macintosh can use the Apple IIgs RGB monitor. The video
port on the Mac provides a signal with a horizontal scan rate of
about 35kHz -- this figure is for the Mac II; newer Macs may be
higher. The Apple IIgs monitor and system video port use a scan rate
of about 15.75kHz. Both IIgs and Mac systems provide analog signals.

> In my opinion the LC would have been the most likely to be able to use the
> monitor.

The LC and IIsi were the first (non compact) Macs to have video on
the main board and folks were pleased to note that, using the right
cable, it was possible to hook up to a standard grotty PC VGA
display. The pinouts are available in Apple's Tech Info library.

> I'd heard rumors that it would, but when you think about the fact
> that they'll all work with a Multisync monitor, doesn't really make sense.

Lots of older computers will work with the early Multisync monitors.
I've used the same Multisync on my IIgs and on a PC. I've run out of
D-connectors temporarily; when I've been shopping I'll sort out the
cables to attach the monitor to my (digital output) Apple III and to
an LC-series Mac.

Phil
**************************************************************
Phil Beesley -- Computer Officer -- Distributed Systems Suppport
University of Leicester

Tel (0)116 252-2231
E-Mail pb14_at_le.ac.uk
Received on Tue Nov 11 1997 - 08:23:59 GMT