16 Mar
2015
16 Mar
'15
6:58 a.m.
From: Pete Turnbull
2.9BSD doesn't need split I&D, but 2.11BSD
does.
Doesn't 2.11 also need Supervisor mode (at least, for the networking code)?
Of course, there is not (AFAICR) any machine with split I&D but not
Supervisor, so the question above is purely intellectual, not of practical
consequence. (Unless you have an 11/xx with an Able ENABLE board! :-)
Noel
16 Mar
16 Mar
7:26 a.m.
On Mar 16, 2015, at 7:58 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu> wrote:
Yep. Netnix runs as a standalone task in supervisor mode.
From: Pete
Turnbull
2.9BSD doesn't need split I&D, but
2.11BSD does.
Doesn't 2.11 also need Supervisor mode (at least, for the networking code)?
Of course, there is not (AFAICR) any machine with split I&D but not
Supervisor, so the question above is purely intellectual, not of practical
consequence.
Nothing wrong with purely intellectual questions.
(Unless you have an 11/xx with an Able ENABLE board!
:-)
What is an ENABLE board? Unibus, qbus?
Noel
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