31 Oct
1998
31 Oct
'98
2:51 p.m.
Tony Duell wrote:
If you saw this CPU card in a junk pile and didn't know it was a UNIBUS
card you'd mistake it for some kind of 8085 controller board with 74181s
on it. Sort of sick, a PDP-11/44 slaved to a 8085.
--Mitch
One expects that the operating system executing on the 11/44 will be
RSTS or RX/11 or some other operating system. Hence, the commands
(and isn't this obvious) acceptable at the keyboard are relative to the
operating system. So, which OS is it that is running on your machine?
The 11/44 has a rather nice monitor built in to the CPU system. It runs
on an 8085 processor, and it lets you type commands on an standard ascii
terminal to edit the PDP11's memory, start/halt programs, etc. Even look
at the CPU microprogram counter.
It's a replacement for the old lights-and-switches panel. The commands
are totally independant of any OS you might be running - in fact you can
use the 'frontpanel' commands on a machine with no mass storage at all.
-tony