Warner Losh 1cf5f5552b MFS: I was confused. This code wasn't in -current after all.
Merge in the irq 0 detection.  Add comment about why.

If we have irq 0, ignore it like we do irq 255.  Some BIOS writers aren't
careful like they should be.
2001-11-26 21:25:03 +00:00
..
2001-11-06 16:15:47 +00:00