DECmate III and Rainbow 100+

[Paul Koning]

>>>>> "Tony" == Tony Duell <ard at p850ug1.demon.co.uk> writes:

 >> 9600 or 19,200 bps).  I can't find my VR201 to check if video is
 >> coming out either one.

 Tony> If you're desparate I can find the pinouts of the monitor
 Tony> connector and you can hook up a composite (RS-170 'NTSC') mono
 Tony> monitor.

It's in the Pro 300 technical manual, on Al's website.

The video connector is a bit weird.  It carries both a mono
(grayscale) signal with standard sync, and also on separate wires an
RGB signal with sync on blue (not on green).  Don't know if the
Rainbow and DECmate have a color option, but the Pro does and that's
where it goes.

And yes, the whole thing is powered, rather poorly, from 12 volts.
(Poorly: if you flip significant quantities of white pixels on and
off, the scan area expands and shrinks very noticeably.  So clearly
the supply regulation is seriously inadequate.)

    paul