Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!rutgers!husc6!necntc!custom!boykin
From: boykin@custom.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Need help with MS-DOS 3.1 and COM1 device
Message-ID: <501@custom.UUCP>
Date: Mon, 9-Feb-87 16:24:52 EST
Article-I.D.: custom.501
Posted: Mon Feb  9 16:24:52 1987
Date-Received: Tue, 10-Feb-87 05:43:40 EST
References: <3281@hplabs.hplabs.UUCP> <1342@kontron.UUCP> <1987Feb6.163015.22731@utcs.uucp>
Organization: Custom Software Systems; Natick, MA
Lines: 13
Summary: DOS has problems opening devices


In article <1987Feb6.163015.22731@utcs.uucp>, gervers@utcs.UUCP writes:
> I had same problem using MSC v3, I used fopen and did fprint, etc.  It turns
> out fopen("COM1:","w") returned NULL, so I abandoned this approach.  
> gervers@utcs

DOS Version 2.XX has MAJOR problems when trying to open a device via the
OPEN call.  It works some of the time, but not always.  Microsoft fixed
the problem in one of the rev 3.X releases (I don't remember which one).

Joe Boykin
Custom Software Systems
{necntc, frog}!custom!boykin