nelson@sun.soe.clarkson.edu (Russ Nelson) (06/21/88)
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?