Path: utzoo!attcan!uunet!husc6!bloom-beacon!mit-eddie!uw-beaver!cornell!batcomputer!sun.soe.clarkson.edu!nelson
From: nelson@sun.soe.clarkson.edu (Russ Nelson)
Newsgroups: comp.sys.ibm.pc
Subject: multiplex interrupt (2F)
Message-ID: <1091@sun.soe.clarkson.edu>
Date: 20 Jun 88 18:19:30 GMT
Sender: nelson@sun.soe.clarkson.edu
Reply-To: nelson@sun.soe.clarkson.edu (Russ Nelson)
Organization: Clarkson University, Potsdam, NY
Lines: 9

According the Zenith's Programmer's Utility Package, Call 0 (Get
Installed State) of the Multiplex interrupt (2fh) *must* be defined
by *all* INT 2F handlers (their emphasis).

However, when I attempt to determine what mutiplex numbers are in
use by looping from 0 to 0ffh, my Z-386 running DOS 3.21 crashes
*when the program exits*.  Therefore, some multiplex handler doesn't
handle call 0 properly.  Does anyone know who, what, when, where, why
or how?