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From: jp@lanl.ARPA
Newsgroups: net.micro.pc
Subject: Re: Questions on Interrupts and DOS
Message-ID: <25474@lanl.ARPA>
Date: Sun, 5-May-85 02:43:47 EDT
Article-I.D.: lanl.25474
Posted: Sun May  5 02:43:47 1985
Date-Received: Tue, 7-May-85 20:45:19 EDT
References: <79@tekig5.UUCP>
Sender: newsreader@lanl.ARPA
Organization: Los Alamos National Laboratory
Lines: 17



I have a related query.  I am attempting to convert a PC DOS program to
run under MS DOS.  The program crashes when I try to run it without any
changes.  Using debug I found that the point at which it died was an
INT 16H. Further searching led to the discovery that INT's 10, 14, 16,
and 17 are used.  I have learned that 16 is Video I/O, 14 involves 
communications (serial ports??), 16 refers to keyboard input, and 17
refers to the printer.  I don't believe the program uses any graphics
or BASIC functions.  I am not sure if it writes directly to the video
RAM.  Can anyone tell me more about these INT's and if I can patch 
corresponding DOS function calls at the interrupt locations to fix the
program so it will run under MS DOS??

Thanks,

Jim Potter     jp@lanl.arpa