From:	CRDGW2::CRDGW2::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX" 30-OCT-1989 19:58
To:	MRGATE::"ARISIA::EVERHART"
Subj:	READMODEM.C

Message-Id:  <8910302037.AA04559@crdgw1.ge.com>
Received: From INDYVAX.IUPUI.EDU by CRVAX.SRI.COM with TCP; Mon, 30 OCT 89 12:22:12 PDT
Date: Mon, 30 Oct 89 15:17 EST
From: "James A. Harvey" <IJAH400@INDYVAX.IUPUI.EDU>
Subject: READMODEM.C
To: info-vax@sri.COM
X-Vms-To: IN%"info-vax@sri.com"

I recently posted some example code in VAX C (READMODEM.C) that displays
the controller type and modem control bits for a terminal, the idea being
that you can determine if a terminal is a LAT terminal by whether the
controller type code is equal to DT$_LAT.

Sites running versions of VAXC prior to 3.0 will get an undefined symbol
error for the symbol DT$_LAT when compiling the program.  To correct the
problem, add the following #define statement after the #include statements
at the beginning of the program:

#define DT$_LAT 74		/* Controller type code - LAT server */

This will correct the undefined symbol problem.  I don't know if the program
will give correct results on versions of VMS prior to 5.1 or not, the only
system I had to test it was a 5.1 system.

The problem doesn't occur for sites running the current version of VAXC (3.0).
Sorry about this; I should have included version information in the comments.

- Jim Harvey, Senior Analyst/Programmer, IUPUI Computing Svcs. (DEC Systems)
Internet: ijah400@indyvax.iupui.edu   UUCP: ...{uunet, ?}!iuvax!ivax!ijah400
BITNET: ijah400@indyvax   AT&T: (317) 274-0747                   Disclaimer:
Opinions expressed here are my own and not necessarily those of my employer.