Serial ports

[M D L]

I'm running Fedora 18 on a computer that's being used to connect to a Cisco lab.  I have three serial cards of four ports each, plus an unused serial header on the motherboard.  ttyS0 is assigned to the motherboard serial port.

cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A port:000003F8 irq:4 tx:16 rx:0
1: uart:16C950/954 mmio:0xFEA01000 irq:18 tx:85 rx:121 CTS
2: uart:16C950/954 mmio:0xFEA01200 irq:18 tx:87 rx:84 CTS|DSR
3: uart:16C950/954 mmio:0xFEA01400 irq:18 tx:90 rx:320 CTS


I've tried adding 8250.nr_uarts=13 to the grub kernel boot line, but still only have ttyS0-ttyS3.  I would prefer something that would remain in effect across reboots (MAKEDEV I also had problems with).

Thanks,

Michael
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