24 Jan
2008
24 Jan
'08
3:48 p.m.
What you need is the field maintenance printset for
the PDP11/23 or
PDP11/24 CPU board. I don't have either, alas, are they on-line
anywhere?
Bitsavers.org to the rescue!
http://bitsavers.org/pdf/dec/pdp11/1124/
The video from the Profesional (and indeed from the
'Bow and Decmates)
is
stnadard RS-170 TV-rate composite video. If you have the colour card
fitted, it's sync-on-green RS-170 timings (that is, the green signal
is a
RS-170 composite signal, the red and blue signals are video only, no
syncs). I would have thought you could find something to display that.
Ethan Dicks has suggested that a composite monitor will do. I've got a
Commodore Amiga monitor here with SCART, I'll wire it up to that. It
works at 60Hz (I'm in Australia - 50Hz PAL). Thanks for the tip too,
Ethan.
Looking at the schematics and descriptions for the F-11 CPU, it is
*very* tricky. A lot of the timings are handled externally. Still, it
would be cool to prototype a F-11 board - but first I'll see if I can
get the 350 humming.
Thanks!
Alexis.