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From: mower@sunybcs.UUCP (James E. Mower)
Newsgroups: net.unix,net.micro.pc,net.lang.c
Subject: Getting OUT from C
Message-ID: <60@sunybcs.UUCP>
Date: Mon, 9-Jun-86 10:08:01 EDT
Article-I.D.: sunybcs.60
Posted: Mon Jun  9 10:08:01 1986
Date-Received: Tue, 10-Jun-86 20:13:12 EDT
Distribution: na
Organization: SUNY/Buffalo Computer Science
Lines: 6
Keywords: IBM-AT, XENIX, C, assembler
Xref: burl net.unix:5938 net.micro.pc:6572 net.lang.c:7031

I'm trying to write to an internal port within the AT running under
XENIX.  Unfortunately, I don't know enough assembler to get to the 
OUT function directly (I keep getting segmentation faults when I try
to write to port 991 (decimal)) so I am looking for a comparable way
to get to it from the C compiler under XENIX.  Can anyone tell me how
this might be done?  Thanks in advance.