Only four /dev/ttyS# files for serial ports.

[Script Cat]

The PCI serial cards I have installed seem to work but only four ttyS# devices are present in the dev directory.
ttyS0, ttyS1, ttyS2, ttyS3. Is there a place in the bootup shell scripts where these are set?
Do I have to compile the kernel or add modules?
I've looked everywhere I can think of and the only references I can find are in

/proc/tty/driver/serial

serinfo:1.0 driver revision:
0: uart:16550A port:000003F8 irq:4 tx:11 rx:0
1: uart:16C950 port:00008000 irq:20 tx:11 rx:0
2: uart:16C950 port:00008008 irq:20 tx:11 rx:0
3: uart:16C950 port:00008010 irq:20 tx:11 rx:0

AND

/proc/tty/drivers



/dev/tty /dev/tty 5 0 system:/dev/tty
/dev/console /dev/console 5 1 system:console
/dev/ptmx /dev/ptmx 5 2 system
/dev/vc/0 /dev/vc/0 4 0 system:vtmaster
serial /dev/ttyS 4 64-67 serial
pty_slave /dev/pts 136 0-1048575 pty:slave
pty_master /dev/ptm 128 0-1048575 pty:master
pty_slave /dev/ttyp 3 0-255 pty:slave
pty_master /dev/pty 2 0-255 pty:master
pty_slave /dev/pts 136 0-1048575 pty:slave
unknown /dev/tty 4 1-63 console

However I don't really know what these files are.
Could it be as simple as editing these then remastering or maybe these are output file to show what was found.

I appeciate any help on this.

Thanks,
Script Cat

I think I have found the place to change in the Kernel Config File "config2.6.19" under "#serial drivers" there exists the lines
CONFIG_SERIAL_8250_NR_UARTS=4 I changed to CONFIG_SERIAL_8250_NR_UARTS=16
CONFIG_SERIAL_8250_RUNTIME_UARTS=4 I changed to CONFIG_SERIAL_8250_RUNTIME_UARTS=16
Then I recompiled the Kernel using this as the ".config file" and make oldconfig. Now I'm having trouble trying to get the knoppix to use this Kernel.