Article View: comp.sys.amiga.tech
Article #11299Re: Help writing a vblank server in assembly
From: Leo 'Bols Ewhac' Schwab
Date: Thu, 02 Feb 1989 08:46
Date: Thu, 02 Feb 1989 08:46
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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!
> ^^^^^^^^^^^^^^^^^^^^^^^^^
When did this become true? Is this required for handlers, servers,
or both?
I have a VBlank server in "Onion" that sets D0 to 0 on exit, and it's
worked great (so far).
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Leo L. Schwab -- The Guy in The Cape INET: well!ewhac@ucbvax.Berkeley.EDU
\_ -_ Recumbent Bikes: UUCP: pacbell > !{well,unicom}!ewhac
O----^o The Only Way To Fly. hplabs / (pronounced "AE-wack")
"Work FOR? I don't work FOR anybody! I'm just having fun." -- The Doctor
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!apple!well!ewhac From: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) Newsgroups: comp.sys.amiga.tech Subject: Re: Help writing a vblank server in assembly Message-ID: <10569@well.UUCP> Date: 2 Feb 89 08:46:57 GMT References: <3777@crash.cts.com> <5854@cbmvax.UUCP> Reply-To: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) Organization: Boing Boom Tschak Lines: 15 Quote: "I feel like such an idiot." -- Riker "Quite right. So you should." -- Picard