[Oberon] Re: CF-IDE adapter (Postscript)
shark at gulfnet.sd64.bc.ca
shark at gulfnet.sd64.bc.ca
Thu Nov 24 18:45:34 CET 2005
Postscript ...
ss> It seems, however, that NO does not use virtual memory at all
(or does it?).
We see in PC Native 05.01.2003
MODULE ATADisks; (** non-portable *) (* cp/pjm/prk *)
...
CONST ... MaxPRD = 3; (* <= 4 *) ...
TYPE ... PRDT = POINTER TO RECORD
prd: ARRAY MaxPRD OF RECORD ...
PROCEDURE TransferDMA ... (* init prdt *) ...
.
So a PRDT is used in TransferDMA even if there is no VM.
... Peter
Desktops.OpenDoc http://carnot.pathology.ubc.ca/
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