K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2001-11-26T21:25:03.000000Z
K 7
svn:log
V 221
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.

END