Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!usc!apple!dlyons
From: dlyons@Apple.COM (David A. Lyons)
Newsgroups: comp.sys.apple
Subject: Re: HyperC //gs patch
Message-ID: <38526@apple.Apple.COM>
Date: 11 Feb 90 05:31:47 GMT
References: <13758@phoenix.Princeton.EDU>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 18

In article <13758@phoenix.Princeton.EDU> kadickey@phoenix.Princeton.EDU (Kent Andrew Dickey) writes:
>Question: Does the //gs always enable the ROM when an interrupt occur?
>If so, how is one supposed to return to a routine on the language card
>that was interrupted?

No, certainly not before it calls the main interrupt handler, which I believe
is the one you're patching ($E10010).  It's your code's responsibility to
preserve, set up, and restore any particular memory environment you need
(the STATEREG at $E1C068 will be helpful here).
-- 

 --David A. Lyons, Apple Computer, Inc.      |   DAL Systems
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