Acrosser Technology AAD-C622A Series, Руководство пользователя

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4.3. Appendix A
Users have to modify the boot loader configuration to support COM6. Take the grub
configuration file as an example. Add ‘8250.nr_uarts=XX noirqdebug’ at the setting
of kernel. Here, XX represents the number of COM ports the system will support.
Because the power subsystem connects to main system via COM6, the XX must be
greater or equal to 6.
1. Modify the grub.conf.
[root@linux ~]# vi /boot/grub/grub.conf
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.27.5.117.FC10)
root (hd0,0)
kernel /vmlinuz-2.6.27.5.117.FC10 ro root=/dev/hda2 rhgb
quiet
8250.nr_uarts=6 noirqdebug
initrd /initrd-2.6.27.5.117.FC10.img
2. List the status of the COM ports in the system.
# setserial -g /dev/ttyS*
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: 16550A, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: 16550A, Port: 0x03e8, IRQ: 11
/dev/ttyS3, UART: 16550A, Port: 0x02e8, IRQ: 10
/dev/ttyS4, UART: 16550A, Port: 0x04f8, IRQ: 11
/dev/ttyS5, UART: 16550A, Port: 0x04e8, IRQ: 10
The node ‘/dev/ttyS5’ corresponds to COM6. The IO port is
0x4e8, IRQ 10.