10 Feb
2013
10 Feb
'13
12:42 p.m.
On Feb 8, 2013, at 5:29 PM, Ethan Dicks wrote:
One of the reasons that my MEM-11A project has been delayed
(other than not having enough time and other life issues) is to
provide enough functionality in one board to be able to run Unix
v1.
Right now it contains:
- 128KW of memory (because getting enough memory
reasonably in an 11/20 is hard)
- Boot ROMs
- LTC (of various flavors)
- KE11A/B functionality
- 2MW of RF11
- 2 SLUs
The goal of this board is to be able to have a complete Unix V1
11/20 system contained within the 11/20 CPU chassis (other than
the RK05 drives).
I've come to the conclusion that I've done almost as much as
I can with a Xilinx development board. I've done all of the part
selection and am going to layout a board (SPC) and continue
development on what I hope will be close to the final board but
time will tell.
Sorry, but I don't have a completion date yet.
TTFN - Guy
On Fri, Feb 8, 2013 at 1:41 PM, Dave McGuire
<mcguire at neurotica.com> wrote:
I was lucky enough to have a KE11-A for my 11/20 (and it works AFAIK).
Other's I know have managed to come across KE11-Bs.
Ahh, if the KE11-B will run in an 11/20, then
I'll be hanging onto one
of them, as I'm working on getting an 11/20.
It will work in pretty much everything, AFAIK, since it's a peripheral
not a "CPU extension". The KE11-A is functionally identical but
built on the backplane peripheral model of the 11/20 and rare enough
that I never figured on running across one I could get. I know that
there's an occasional KE11-B running around since it's a single card. I'd love to see v1 UNIX running on real
iron.
Me too. It's no big shake to run it on a real PDP-11 - as long
as you have a KE11 of some kind in there _and_ you have
matching peripherals for the 1972-era code. I haven't tried
it, but I would be surprised to learn that you couldn't get
v1 UNIX working on an 11/04 (peripheral issues aside).
What I really want to do (and it sounds like you do too) is
to run v1 UNIX not just on real iron, but the on the closest
approximate I can manage of what was used in 1972.