26 Jul
2000
26 Jul
'00
8:11 a.m.
Bill Pechter <pechter(a)pechter.dyndns.org> wrote:
The protocol used by the RDC (as far as I know) was
very closely held.
I couldn't get any docs on it in Field Service (I wanted to write a
CP/M program so my VT180 or Zorba could be a remote console and diag
loader on the 11/70's.
I was told they were doing ascii bit flips on at least one bit on each byte
but I never got the datascope on the line to see what the protocol
looked like.
I know nothing about the standalone RDC box that's been discussed earlier.
But the 11/70 didn't use that. It used a replacement front panel (without
the usual switches and lights) and a Unibus board. IIRC, it was called
a KY11-R.
The protocol is documented in the manual, and is nothing too special.
Due to some idiot attempting to make their automobile occupy the same
space-time coordinates as mine, a bunch of chinese food was spilled on
my copy of the manual. Assuming that it's still legible, I'll try to
write up a summary when I find some time.