Path: utzoo!utgpu!attcan!uunet!mcvax!enea!kth!draken!chalmers!volvo!peter
From: peter@volvovd.volvo.se (Peter Hkansson)
Newsgroups: comp.sys.ibm.pc
Subject: how to use AUX: in ms-dos
Summary: AUX: COM1: usage, how to ?
Keywords: help wanted
Message-ID: <383@volvovd.volvo.se>
Date: 4 Aug 88 13:35:21 GMT
Reply-To: peter@volvo.UUCP (Peter Hkansson)
Distribution: comp.sys.ibm.pc
Organization: Volvo Data AB, Goteborg, Sweden
Lines: 13

machine ? I am writeing a utility package to communicate with a FANUC
NC machine. As part of that i have to emulate a tape reader controlled by
X/ON X/OFF characters. How do i do to, while transmitting characters, be
able to react on received X/OFF's ?. If i read one character , then if none
is sent, a time out seems to appear after about 1 sec. returning a NULL 
byte. This behavior is not documented (as i know) but at least it prevents
my program to hang forever.     
What i really want is a way to catch incoming characters as they arrive.
In unix a child could be set up, in VMS an AST could be used, both from C.
It is really possible (kermit does it), please give me a clue how.

Thanks an advance
Peter HPkanson /Volvo/data sweden/