22 Sep
2020
22 Sep
'20
5:16 a.m.
Nice find. What does the label on the big hard drive read? I have found a
similar drive with a worn label and i am trying to see if i can find a
system to connect it to.
On Mon, Sep 21, 2020, 3:38 PM Noel Chiappa <jnc(a)mercury.lcs.mit.edu> wrote:
From: Paul
Riley
Using LSX on the 11/03... Will LSX handle cards
with multiple serial
ports?
Ah, I just read this carefully; LSX only supports a single user at a time,
so
there's no use to multiple serial lines? (But see below.) (I thought Heinz'
reply message to this referred to Mini-Unix, which does suppport multiple
users, but on reading it again I see it does not.)
If you want multiple users on an -11/03, Mini-Unix would be an option; it
doesn't support the -11/03 'out of the box', but looking at it, it
shouldn't
be too hard. (Heinz mentioned that it had been done before.) Change all
cases
of 'mov xx, PS' in mch.s:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=Mini-Unix/usr/sys/mxsys/mch.s
to 'MTPS xx' (PS access needs a special instructtion in the /03); that
might
be all you need to do. (Installing a KEV11-A, so you can avoid using the
instruction emulation package for EIS instructions would be nice, but
apparently isn't required.)
If Mini-Unix supports multiple users, it ought to be possible to do the
same
with LSX. (I'm not sure what the rationale was for making LSX single-user:
perhaps the RX was too slow; perhaps there was no need in their use case;
etc.)
But it would probably be more work than going the Mini-Unix route; e.g.
to start with, init only supports a single user:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=LSX/src/init.c
and the tty driver:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=LSX/sys/tv.c
only supports a single line. One could cross-port the needed 'stuff' from
Mini-Unix, but it'd probably be easier to do the Mini-Unix -11/03
conversion.
Noel