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From: urlichs@smurf.sub.org (Matthias Urlichs)
Newsgroups: comp.sys.mac.programmer
Subject: Re: DrvrInstall and DrvrRemove
Message-ID: <i$^ag2.kq3@smurf.sub.org>
Date: 13 Nov 90 07:25:13 GMT
References: <1990Nov12.062133.29315@ux1.cso.uiuc.edu>
Organization: University of Karlsruhe, FRG
Lines: 35

In comp.sys.mac.programmer, article <1990Nov12.062133.29315@ux1.cso.uiuc.edu>,
  resnick@cogsci.uiuc.edu (Pete Resnick) writes:
< I was reading a draft tech note written by Mark Bennett that talked
< about installing drivers at INIT time. I have a couple of questions
< concerning the procedure and my particular project:
< 
< 3. Can I do this at other than INIT time?
< 
No problem. Just make sure that your driver and your DCE end up in the heap
you want them to be in.

< 4. If I want to close the driver and get rid of it, I assume I call
< CloseDriver and then DrvrRemove. Is that right or do I only need to
< call CloseDriver (or PBClose)? If I need to call DrvrRemove, TN 108
< says that it calls ReleaseResource. If I have done a DetachResource,
< that won't work very well. Can this be right?
< 
Yes -- there are flags in the DCE which tell DrvrRemove what to do.
"IL DrvrRemove+0E" (A2 contains the unit table entry; hand-disassembled):
	MOVE.L	(A2),A1
	BTST #5,5(A1)
	BNE.S	Error
	BTST #6,5(A1)
	BEQ.S	noRes
	MOVE.L	(A1),-(A7)
	_ReleaseResource
noRes	MOVE.L	A2,A0
	_DisposHandle
	...
Error	MOVEQ	#$E7,D0
	BRA Out

-- 
Matthias Urlichs -- urlichs@smurf.sub.org -- urlichs@smurf.ira.uka.de     /(o\
Humboldtstrasse 7 - 7500 Karlsruhe 1 - FRG -- +49+721+621127(0700-2330)   \o)/