[2944] in linux-net channel archive
Re: Modem Trouble...
daemon@ATHENA.MIT.EDU (Antonio Garcia =?UNKNOWN-8BIT?Q?A=)
Sat May 18 07:13:59 1996
Date: Sat, 18 May 1996 12:49:57 +0100 (GMT+0100)
From: Antonio Garcia =?UNKNOWN-8BIT?Q?A=F1o?= <garcia@pluton.csnet.es>
To: linux-admin@vger.rutgers.edu
cc: eds@a1.ipcc.com, linux-net@vger.rutgers.edu
n Fri, 17 May 1996, Edward D. Silver wrote:
>=20
> Dear Linux Gurus,
>=20
> 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=20
> as using an interrupt. I have two US Robitics Modems that are fully
> configurable. I would like to have the following configuration...
>=20
> COM1 IRQ4 Mouse
> COM2 IRQ3 Modem #1
> COM3 IRQ5 Modem #2
>=20
> If I switch Modem #1 to Com4, /proc/interrupts shows that IRQ5 is =
=20
> 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=20
> /etc/rc.d/rc.serial:
>=20
> /bin/setserial /dev/cua0 uart 16450 port 0x3F8 irq 4
>=20
> #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=20
>=20
> /bin/setserial /dev/cua2 uart 16450 port 0x3E8 irq 5=20
> =20
> If you have any additional suggestion, please direct them
> to aaronl@ipcc.com or 1-407-989-9330.
>=20
> Thanks
>=20
> Aaron Li>=20
Perhaps your UARTS are 16550 or 16550A if you have internal=20
modems, if they are external you have to look at the UART of your seria=
l=20
port attached to your modems.
=20
::::::::::::::::::::::::::
:Antonio Garc=EDa A=F1=F3:::::::
:Tel: +34-64-514659:::::::
::::::+43-64-517143:::::::
:E-mail: garcia@csnet.es::
:::::::angar@dsic.upv.es::
:::::1897757@finf.upv.es::
::::::::::::::::::::::::::=09
