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From: aaron@madnix.UUCP (Aaron Avery)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Help writing a vblank server in assembly
Message-ID: <455@madnix.UUCP>
Date: 1 Feb 89 13:50:06 GMT
References: <3777@crash.cts.com> <5854@cbmvax.UUCP>
Reply-To: aaron@madnix.UUCP (Aaron Avery)
Organization: ASDG Incorporated
Lines: 14

In article <5854@cbmvax.UUCP> jesup@cbmvax.UUCP (Randell Jesup) writes:
>	Oh, when writing vblank routines, currently you must not assume the
>value of a0 on entry, but MUST set a0 == _custom on exit!  Especially note
>this, people writing in C.

Interesting. So, does this mean that just preserving a0 isn't sufficient?
That's what you imply, since you can't assume that a0 points to _custom on
entry.

-- 
Aaron Avery, ASDG Inc.         "A mime is a terrible thing to waste."
                                                             -- Robin Williams
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