Path: utzoo!utgpu!watserv1!ria!uwovax!7103_2622
From: 7103_2622@uwovax.uwo.ca (Eric Smith)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Spurious interrupt
Message-ID: <6855.26de8fe3@uwovax.uwo.ca>
Date: 31 Aug 90 20:27:15 GMT
References: <883@ehviea.ine.philips.nl> <1166@uhnix2.uh.edu> <885@ehviea.ine.philips.nl> <1168@uhnix2.uh.edu> <1081@netmbx.UUCP>
Lines: 17

In article <1081@netmbx.UUCP>, franky@netmbx.UUCP (Frank Bergemann) writes:
> anybody here, who knows how to get the tos-routines (gemdos, (x)bios)
> reentrant, to use in interrupts ? same question failed in german 
> nets. we don't know which adresses (or their contents) must be 
> saved and reinstalled before leaving an interrupt...
> 
The BIOS and XBIOS routines are already somewhat re-entrant, and can be
made more so by providing a bigger BIOS stack. GEMDOS is inherently
non-reentrant. The safest strategy is probably just to set a flag in the
interrupt routine, and then have the user code check the flag every so
often and take the appropriate action.
--
Eric R. Smith                     email:
Dept. of Mathematics            ersmith@uwovax.uwo.ca
University of Western Ontario   ersmith@uwovax.bitnet
London, Ont. Canada N6A 5B7
ph: (519) 661-3638