Re: Multiport Serial Card !!!!

From: Paul Schulz (
Date: Sun Mar 05 2000 - 23:56:58 EST

Have just installed a 4port serial card, I can say that it's
relatively painless.

The card that I used had 4 separate serial chips on it (16550)..
(Do you know what your's are? 16550A, 16650? )

You need to know the IO address for each port (different for each one)
and the Interrupts (IRQ) used by each port (which may be shared).

[ Does the card have jumpers on it to set the Interupt
and IO address for each port? Or is it configured some other way? ]

( you'll have the serial module (serial.o) because it's a RH 6.1
  and it will be working.. you'll know this if you have a serial mouse
  attached. :-)

use something like the following... for each port...

setserial /dev/ttyS4 port 0x2a0 irq 4 uart 16550
setserial /dev/ttyS5 post 0x2a8 irq 4 uart 16550
... etc ...

[ these were my settings, check 'ma
It you add these lines to the file
then they will get run every time your machine is booted.

You will need to do the following as well:
mknod /dev/ttyS4 c 4 68
mknod /dev/ttyS5 c 4 69
mknod /dev/ttyS6 c 4 70
mknod /dev/ttyS7 c 4 71
mknod /dev/ttyS8 c 4 72
mknod /dev/ttyS9 c 4 73

This creates the character device nodes, and only needs to be done

You should be able to talk to each serial port by reading/writing to
the above character devices?

Good Luck,

Pradish Mathews wrote:
> Hello friends,
> I have a specialix sx multiport serial card.
> My system is RH 6.1 & kernel-2.2.12.
> Can anyone tell me the exact procedure to follow for the installation.
> The sx card which i have is the EISA card.
> Thanks in advance !!!
> -====---====---====---====---====---====---====---====---====---====---====-
> to unsubscribe email "unsubscribe linux-admin" to
> See the linux-admin FAQ:

Paul Schulz( SysAdmin
CAE MRad, Innovation House West, First Avenue, TECHNOLOGY PARK SA 5095
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to

This archive was generated by hypermail 2b29 : Tue Mar 07 2000 - 21:00:27 EST