Re: Help writing a vblank server in assembly

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Article #11280

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#11280

From: Randell Jesup
Date: Wed, 01 Feb 1989 02:35

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In article <449@madnix.UUCP> aaron@madnix.UUCP (Aaron Avery) writes:
>        move.l  4,a6            ;moves SysBase into a6
>        jsr     _LVOSignal(a6)  ;not sure SysBase must go in a6, habit
...
>I'm just used to putting SysBase into a6 - may not matter.

	It does.  Library calls require the library base in A6.  (If they
don't break without it now, they may well in the future.)  Almost all CBM
supplied libraries currently break without the lib base in A6.

-- 
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup

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Message-ID: <5872@cbmvax.UUCP>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bbn!ulowell!cbmvax!jesup

References: <676@cord.UUCP> <449@madnix.UUCP>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bbn!ulowell!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Help writing a vblank server in assembly
Message-ID: <5872@cbmvax.UUCP>
Date: 1 Feb 89 02:35:13 GMT
References: <676@cord.UUCP> <449@madnix.UUCP>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Distribution: usa
Organization: Commodore Technology, West Chester, PA
Lines: 12

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