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From: ekalenda@cup.portal.com (Edward John Kalenda)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Turbo C Interrupt Question
Message-ID: <34729@cup.portal.com>
Date: 10 Oct 90 19:04:40 GMT
References: <32923@nigel.ee.udel.edu>
Organization: The Portal System (TM)
Lines: 9

I may be wrong, but the way I do it is to look at the return address on the
stack. By examining the instruction it points to (actually the instruction
before) to see if it is an INT will tell me if it is hardware or software.
A better method is to have the interrupt handler call a second routine with a
flag parameter to indicate the hardware/software nature of the caller. When
you call from software, call the second routine instead of the handler.

Ed
ekalenda@cup.portal.com