Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!cwsys2!rong
From: rong@cwsys2..CWRU.Edu (Rong Chen)
Newsgroups: comp.sys.ibm.pc
Subject: Re: telix and com3
Message-ID: <646@cwjcc.CWRU.Edu>
Date: 19 Mar 89 03:48:19 GMT
References: <94545@sun.Eng.Sun.COM>
Sender: news@cwjcc.CWRU.Edu
Reply-To: rong@cwsys2.UUCP (Rong Chen)
Distribution: usa
Organization: CWRU Dept of Systems Engineering
Lines: 59

In article <94545@sun.Eng.Sun.COM> kirk%enterprise@Sun.COM ('Captain' Kirk DeHaan) writes:
>I recently bought an internal 2400b modem.  I also have 2 com
>ports in my system.  My problem is that I want to maintain the
>two RS-232 ports as com1 and com2 while having the modem at
>com3.  Using procomm+ allows me to do just this but a problem
>arises when trying to dial in to a unix system.  Regardless
>of the settings I get nothing but garbage from the unix system.
>If I move the modem to com1 or com2 and use telix it works great.
>The modem internal with procomm+ works fine when calling all
>the other systems I have access to.  
>
>I guess I have two questions then.
>
>1.  Is there a fix for the procomm+ problem?  I'm not sure what the
>cause is but it is definately related to procomm+.  Using a
>different modem (USR Courier) gives the same problem.
>
>2.  Can Telix (3.11) be made to work with com3?  The docs say yes but
>trying to do so results in a hung system.  Looking at the telix.cnf file
>shows the values assigned to the port addresses but I can't
>figure out how they are used.  They are listed as 1000 for com1 and
>1016 for com3. 
>
>BTW, I would prefer to use Telix.  It has zmodem capabilities built
>in and seems to have the bells and whistles I desire.
>
Some hints:

"industry standard" port address and interrupts:
port		i/o address		interrupt
-------------------------------------------------
com1		3F8 hex			4
com2		2F8 hex			3
com3		3E8 hex			4
com4		2E8 hex			3

therefore if you use interrupt driven software at com1, e.g. a mouse, then
the communication software(no matter which one you use, Telix or Procomm)
at com3 will conflict with com1 since they use the same interrrupt when
the bus drivers on both serial ports are turned on at same time.

If you configure the communication software( Telix or Procomm) on com3,
and do not use the com1 port, you should have no problem.

To remind you, following are almost always interrupt-driven applications:
* communication programs
* laptop/desktop file transfer programs
* serial port LANs
* bulletin board programs
* remote access programs
* PC fax softwares

DOS MODE command redirect program(i.e. MODE LPT:=COM1:) is not interrupt-
driven program.

Hope these will help you.

Rong Chen
rong@cwsys2.cwru.edu