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From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Help With VBL Tasks
Keywords: VBL task; post itself; BOMB
Message-ID: <451@internal.Apple.COM>
Date: 20 Jan 89 17:58:17 GMT
References: <8343@orstcs.CS.ORST.EDU> <27628@ucbvax.BERKELEY.EDU>
Organization: Advanced Technology Group, Apple Computer
Lines: 16

In article <27628@ucbvax.BERKELEY.EDU> oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster) writes:
>n addition to all the previous problems, most versions of SetUpA5() look
>at a global variable, CurrentA5, which is not guaranteed to be correct
>under multifinder.


Tech Note 208 also mentions a problem in that SetupA5 saves the current A5
on the stack, which screws up some optimizing compilers (eg, MPW C 3.0).
It suggests that you save the current A5 value in a local place and restore
it at the end.

-- 
		 Larry Rosenstein,  Object Specialist
 Apple Computer, Inc.  20525 Mariani Ave, MS 46-B  Cupertino, CA 95014
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