Physical memory access under Xenix
Ted Lemonmellon/.name
mellon at mit-prep.ARPA
Thu May 8 03:48:40 AEST 1986
> Yup, there are two system calls dscralloc() which allocates a descriptor
> for you and mmudescr() which points it at a physical address. If you
> have far keywords enabled you can do something like
First of all, thanks for responding. I received some really good
suggestions, of which the above was the cleanest. Unfortunately, the
IBM version of Xenix does not have a symbol _dscralloc(), while the
SCO version does. Does anybody know if there is an equivalent
function in the IBM version of Xenix, or do I need to use John
Little's method of hacking a (hopefully) unused entry in the GDT?
When this is over and I have made a driver for IBM Xenix and SCO
Xenix, I will post a summary of how I did it... For now, I am going
to hack the GDT...
_MelloN_--
Ted Lemon
Project GNU of the Free Software Foundation
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