21 Nov
2019
21 Nov
'19
11:29 p.m.
On 11/21/2019 5:58 AM, Dan Cross wrote:
On Thu, Nov 21, 2019, 1:33 AM Al Kossow
<aek(a)bitsavers.org
<mailto:aek@bitsavers.org>> wrote:
It was, and may still be in the afs heirarchy
I'm not going to say where, or how complete what was there is
I also seem to remember it still sat on top of an AIX microkernel
and didn't go down to bare metal.
No, that's not true. AOS was basically 4.3BSD Tahoe plus NFS and it ran
on bare RT hardware. There was source code available to universities,
though as I recall some bits related to memory management were missing
and distributed as object files. I gathered, at the time, this was due
to some obscure intellectual property reasons. People later tried to
Port e.g. 4.4BSD to aging RT hardware and found it challenging because
the memory subsystem was so different.
But anyway, there was no hypervisor involved.
There may well have been AFS for AIX and thus the confusion about
hypervisor (AIX VRM).
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