PDP-11/44 boot prompt

From: Mitch Wright <mew_jac_at_swbell.net>
Date: Sat Oct 31 22:51:09 1998

Tony Duell wrote:
>
> >
> > 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.

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


>
> 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
Received on Sat Oct 31 1998 - 22:51:09 GMT