15 Serial Ports

To add a new serial port from a PCI card if the system does not see it.

1. Determine the I/O port and interupt the card uses
   $ less /proc/pci 
   Bus 2, device 1, function 0: 
   Serial controller: NetMos Technology 222N-2 I/O Card (2S+1P) (rev 1).  
   IRQ 11.  
   Master Capable. Latency=64.  
   I/O at 0xecf8 [0xecff].  
   I/O at 0xece8 [0xecef].  
   I/O at 0xe4d8 [0xe4df].  
   I/O at 0xecc8 [0xeccf].  
   I/O at 0xecb8 [0xecbf].  
   I/O at 0xeca0 [0xecaf].
2. Create the file /etc/rc.d/serial.sh. Using the above I/O and Interrupt values add a line for each ttyS* 
   /bin/setserial /dev/ttyS1 port 0xecf8 uart 16550 irq 11 baud_base 115200 
   /bin/setserial /dev/ttyS2 port 0xece8 uart 16550 irq 11 baud_base 115200
3. Repeat for as many ports as the card(s) support.
4. Source this file in /etc/rc.d/rc.local
   . /etc/rc.d/serial.sh