8 Feb
2013
8 Feb
'13
8:29 p.m.
On Fri, Feb 8, 2013 at 1:41 PM, Dave McGuire <mcguire at neurotica.com> wrote:
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.
Step one is to get the 11/20 doing *anything*. Step two
is to get the 11/20 running with RK05s. Then I can start
to consider how I would either provide a register-compatible
swap device or how much coding changes I'd have to tackle
to get v1 code to use some _other_ swap device. Once I
have a plan for how to provide swap, _then_ it's worth
looking in all seriousness for a KE-11.
Many steps to go before I have anything to purchase. Lots
to fix and play with.
-ethan
10 Feb
10 Feb
3:42 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.
4:37 p.m.
On Sun, Feb 10, 2013 at 3:42 PM, Guy Sotomayor <ggs at shiresoft.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.
Nice. I wouldn't turn up my nose at either one.
>> I'd love to see v1 UNIX running on real
iron.
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.
Cool!
Right now it contains:
- 128KW of memory (because getting enough memory
reasonably in an 11/20 is hard)
No doubt. I have somewhere between 4-6 memory backplanes
and card sets minus at least one core plane (saved by a fellow
employee who helped me rescue this machine from the dumpster).
I _might_ be able to get it back from him _if_ I sent him another
plane with a clear cover to hang on his wall.
I should have a better handle on what I have and what I need
in the next few weeks when I move this and other "interesting"
items.
- KE11A/B functionality
Sweet!
- 2MW of RF11
Sweeter!
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 was going to get a MEM-11A *anyway*. This makes it so much
more appealing. Now I might get two, one to leave in the 11/20
and one to float between my other older Unibus machines.
Sorry, but I don't have a completion date yet.
No worries. I wouldn't have my 11/20 in a working state this year
anyway. Too many other projects in the pipeline. If I didn't have
to completely re-do all the DC power supply wiring, it might be
feasible.
-ethan
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ethan.dicks＠gmail.com -
ggs＠shiresoft.com