I get IRQ 0 also.  It look suspicious, but works anyway.
I am checking the Intel docs.

Kim Hendrikse <kim@kiwiclan.com> wrote:
What interrupt is it using? If I cat /proc/interrupts, it doesn't
show up. And dmesg|fgrep -i tty shows irq 0. What do you get
when you do this?

- Kim

Do you Yahoo!?
New and Improved Yahoo! Mail - Send 10MB messages!