21 Nov
2007
21 Nov
'07
6:33 p.m.
Dave Mitton wrote:
As the KMC-11 Development Tools developer for RSX-11M
and VMS, I know
it's possible.
I just don't remember the all the hoops we jumped through to do it.
(this was circa 1978/79)
There are a bunch of KMC manuals up on Manx. I cannot find my hardcopy
right
now, but many of those sorts of manuals of that era (i.e. Comms & 1980s)
had sample PDP-11 code (sometimes for multiple Oss). So there's a chance
that the various hoops are documented somewhere accessible ....
On VMS I had to learn the very new facility (I
don't think it was in
V1.0) of Page Frame Mapping and allocate a page map to get to UNIBUS
IO
space. This required a specific privilege too.
The specific privilege was PFNMAP ...
Antonio
arcarlini at iee.org
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