Path: utzoo!attcan!uunet!ateng!chip
From: chip@ateng.ateng.com (Chip Salzenberg)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Dos calls within TSR's
Message-ID: <1988Nov25.180809.13618@ateng.ateng.com>
Date: 25 Nov 88 23:08:08 GMT
References: <17309@vax5.CIT.CORNELL.EDU> <897@taurus.BITNET>
Organization: A T Engineering, Tampa, FL
Lines: 15

According to zifrony@TAURUS.BITNET:
>It seems DOS itself is not re-entrant.

No kidding.

>I have heard of an undocumented interrupt (at least in DOS 3.30), which
>enables the user to know whether its interrupt routine interrupted
>a DOS service or not.  I think books dealing with TSRs mention this
>function.

I learned a lot from "The MS-DOS Bible" (the Waite group).
-- 
Chip Salzenberg             <chip@ateng.com> or <uunet!ateng!chip>
A T Engineering             Me?  Speak for my company?  Surely you jest!
	   Beware of programmers carrying screwdrivers.