PDP-11/60 WCS (was Re: pdp-11/60 Semi-Rescue)

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Nov 22 01:30:17 1999

Tony wrote:
> Wasn't the writeable control store an option for the 11/60 as well? I
> seem to remember that the 11/60 I did a couple of minor repairs on didn't
> have this board.

In fact, the 11/60 was the ONLY non-microprocessor-based PDP-11 that
had a writable control store option.

(The VAX-11/7xx machines aren't really PDP-11s, though they do have a
compatability mode.)

There was an aftermarket WCS option for the 11/45. However, this was
a very hairy device, because the standard 11/45 hardware did not have
enough leftover microcode address space to be useful, nor did it have
any data paths beyond what were necessary for the standard microcode.
They had to add a whole lot of stuff.
Received on Mon Nov 22 1999 - 01:30:17 GMT