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From: mark@sdencore.UUCP (Mark DiVecchio)
Newsgroups: net.micro.pc
Subject: Calling DOS from inside of Interrupts
Message-ID: <115@sdencore.UUCP>
Date: Sun, 19-May-85 13:40:27 EDT
Article-I.D.: sdencore.115
Posted: Sun May 19 13:40:27 1985
Date-Received: Thu, 23-May-85 04:27:56 EDT
References: <84@tekig5.UUCP> <1050033@acf4.UUCP>
Reply-To: mark@sdencore.UUCP (Mark DiVecchio)
Organization: Encore Computer Corp., San Diego
Lines: 16
Summary: 

I have worked out a technique which lets me make calls to DOS interrupt
21 on the IBM PC from within Interrupt Handlers. I don't know if the
routine is foolproof but it seems to work. If anyone would like a copy
of the assembly language contact me. If I get enough requests, I will
post it here otherwise I will just mail it to the requesters.

The technique, by the way, was not invented by me but I pulled
together 3 or 4 different attempts to make one that seems to work
consistently. Of course, without knowing what Microsoft did inside
of PC(MS)-DOS, we'll never know what works correctly all of the time.


-- 
Mark C. DiVecchio
K3FWT
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