Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!udel!haven!umbc3!gmuvax2!2113av
From: 2113av@gmuvax2.gmu.edu (John Porter)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Is BIOS Reentrant?
Message-ID: <2893@gmuvax2.gmu.edu>
Date: 13 Nov 90 18:06:55 GMT
References: <4844@trantor.harris-atd.com> <11569@hubcap.clemson.edu>
Reply-To: 2113av@gmuvax2.UUCP (John Porter)
Distribution: na
Organization: George Mason Univ. Fairfax, Va.
Lines: 14

In article <11569@hubcap.clemson.edu> lsalomo@hubcap.clemson.edu (lsalomo) writes:
>but I do believe that you can use up to int 9 with no problems (someone else
>better verify this).

YAHHH! What do you mean by "use" up to int 9? Those are interrupts are 
hardware-generated; you might program a handler for them, but you should
never call them.  The question is, what interrupts can you call while
handling an interrupt.  Many BIOS interrupts don't care how deeply you
nest calls to them.  Results may be unpredictable, but at least you won't
snocker the system, unlike with many DOS calls.
--jp

#     "Baby...Mother...Hospital...Scissors...             #
#     "Creature...Judgment...Butcher...Engineer"   OMD    #