[2938] in linux-net channel archive
Modem Trouble...
daemon@ATHENA.MIT.EDU (Edward D. Silver)
Fri May 17 21:32:47 1996
Date: Fri, 17 May 1996 14:21:08 -0400 (EDT)
From: "Edward D. Silver" <eds@a1.ipcc.com>
To: linux-net@vger.rutgers.edu
Cc: linux-admin@vger.rutgers.edu, Aaron Lieberman <aaronl@a1.ipcc.com>
Dear Linux Gurus,
I am trying to connect two modems to a linux machine (P5-90).
One modem by itself works fine, however, the second seems to be
causing an interrupt problem (very very slow data transfer speed).
I am using /proc/interrupts to determine if my system is configured
correctly. So far, only the first two used Com ports are showing up
as using an interrupt. I have two US Robitics Modems that are fully
configurable. I would like to have the following configuration...
COM1 IRQ4 Mouse
COM2 IRQ3 Modem #1
COM3 IRQ5 Modem #2
If I switch Modem #1 to Com4, /proc/interrupts shows that IRQ5 is
being used but not IRQ3. So apparently only the first two USED
Com ports are being detected. After reading the Serial-HOWTO file,
I added the following lines to both /etc/rc.d/rc.local and
/etc/rc.d/rc.serial:
/bin/setserial /dev/cua0 uart 16450 port 0x3F8 irq 4
#disable COM4 or COM2 to avoid using IRQ3 twice
/bin/setserial /dev/cua3 uart none
/bin/setserial /dev/cua1 uart 16450 port 0x2F8 irq 3
/bin/setserial /dev/cua2 uart 16450 port 0x3E8 irq 5
If you have any additional suggestion, please direct them
to aaronl@ipcc.com or 1-407-989-9330.
Thanks
Aaron Lieberman
