Anyway: manually using setserial should be done first if you are having
trouble with it before using it in /etc/rc.d/rc.serial.
Be sure to check the settings of the new serial ports before using
setserial.
Here is an excerpt from the setserial man page:
----------------------------------------------
setserial is a program designed to set and/or report the
configuration information associated with a serial port.
This information includes what I/O port and IRQ a particu-
lar serial port is using, and whether or not the break key
should be interpreted as the Secure Attention Key, and so
on.
During the normal bootup process, only COM ports 1-4 are
initialized, using the default I/O ports and IRQ values,
as listed below. In order to initialize any additional
serial ports, or to change the COM 1-4 ports to a non-
stadard configuration, the setserial program should be
used.
/--------------------------------------------\
| Kirk Wolff gwn.vhtcg@fire2wire.com
|
| "Well, that was a piece of cake, eh K-9?"
|
| "Piece of cake, Master? Radial slice of baked confection ...
| coefficient of relevance to Key of Time: zero."
\ -- Dr. Who