Path: utzoo!attcan!utgpu!watmath!iuvax!mailrus!ukma!simon
From: simon@ms.uky.edu (G. Simon Gales)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Activating COM3 and COM4
Message-ID: <11675@s.ms.uky.edu>
Date: 10 May 89 13:44:37 GMT
References: <8036@fluke.COM> <102455@sun.Eng.Sun.COM>
Reply-To: simon@ms.uky.edu (G. Simon Gales)
Distribution: na
Organization: U of Kentucky, Mathematical Sciences
Lines: 16

DOS keeps the port address table at 40:0, there should be a port 
address for each COM port (1-4).

0040:0000 Port address of COM1
0040:0002   "     "    "  COM2
0040:0004   "     "    "  COM3
0040:0006   "     "    "  COM4

This is also documented in the MS-Kermit manual, which includes a 
short COM prg (type it in in DEBUG) that does this for you.  The
actual port addresses depend on the serial card(s).

-- 
/------------------------------------------------------------------------\
  Simon Gales@University of Ky
  {rutgers, uunet}!ukma!simon  -  simon@ms.uky.edu  -  simon@UKMA.BITNET