Re: Apple 'Monitor 100' works on GS

[Chet Gerhardt <transit@wco.com>]

Mitchell Spector <spec@vax2.concordia.ca> wrote:
:     This is rather interesting. A local person, having come across a pair
: of Apple IIgs's and RGB monitors, asked for the pinouts to GS's RGB port
: (seeing that he lacked a cable to connect the monitor and wanted to build
: his own). I assumed he must have received an AppleColor RGB display, but
: after connecting things up, he reported the screen worked fine _but_ colors 
: weren't matching up. I asked for some details on the RGB monitor; he told 
: me it was an Apple model 'A9M0308', beige colored case and pointed out it
: had a motorized tilt screen. If I'm not mistaken, this is the Monitor 100.
: A *digital* RGB display for the Apple III and IIe (with RGB adapter card).

:     A few years ago, I managed to do the reverse. I plugged an analog RGB
: (AppleColor RGB) from a IIgs, into an Apple III. The results were similar,
: a perfectly viewable image but with color information not matching up.
: How is it an analog and digital RGB screens can be interchangable? Do these
: monitors have some sort of alternate mode, or the Apple III and IIgs
: themselves have some way of sending out different video signals.

: Mitchell Spector
: spec@vax2.concordia.ca

The standards are different for the 2 monitors.  It is my understanding
that they will connect to each other but the colors are poor and there is
also a brightness problem.  Long ago someone @ Alltech told me to reverse
several pins on the monitor and it would fix the problem.  That did not
work, using a rainbow display I got several large color bars with poor
color quality.  The IIgs standard for RGB was changed after the
prodution of the IIe RGB.  AE Ramworks Video Cards recongnize this
difference, the Digital Prism is for IIe RGB, the Color Link for the IIgs
RGB.

I use 100 Monitors on my IIe's, much better color than the runny
composited I formerly used.

Chet