21 Sep
2020
21 Sep
'20
9:30 p.m.
Interaction with the outside world on the first LSX system
used standard DEC interfaces of the day - DLV-11 (serial)
and DRV-11 (parallel), plus a specially designed interface
card for a local device. The DLV-11 supported only one
serial port in 1975. Other DEC interface devices may have
been added to the Qbus after the mid 1970's.
Heinz
On 9/21/2020 6:54 AM, Paul Riley wrote:
Heinz,
Using LSX on the 11/03, what did you use for interaction with the
outside world? The SLU of the time had only one port I believe, and
that would be tied up with the console terminal. Will LSX handle cards
with multiple serial ports? Was there a favoured digital or analog I/O
board with some form of kernel support?
Paul
*Paul Riley*
On Sat, 19 Sep 2020 at 22:22, Heinz Lycklama <heinz(a)osta.com
<mailto:heinz@osta.com>> wrote:
I do believe that it would be easier to use LSX source code,
but I also know that some folks at universities were able
to modify the source for Mini-UNIX to run on 11/03 in
the mid-70's because of the two, only Mini-UNIX source
code was available to universities.
Heinz
On 9/18/2020 8:22 PM, Paul Riley wrote:
Team,
I’ve read thru the FAQ and other sources regarding compatibility
of Research and other flavours on the PDP-11. I have two physical
machines, an 11/03 and an 11/23+. I’m choosing which version to
use on each machine.
Is LSX the only option on the 11/03, or could I run V6 or
Mini-Unix with more RAM?
From the FAQ, it says V7 would support 11/23 with kernel
recompilation, I assume includes 11/23+. I see 2.11BSD would also
run on a ‘23 (and + I guess) with 1MB or more of RAM, so that
would be preferred. I suppose 2.11 would be preferable.
I also have found another 11/23+ system from a seller here in
China. There’s the system, and a VT100, and a hard drive I can’t
identify. Here’s a photo, does anyone know what it is? I may bid
for it...
Paul
*Paul Riley*