> One of the big problems here is that the Alpha has exactly 1 device
> interrupt level, and when you block e.g. network or scsi interrupts,
> you block serial interrupts, too.

Which Alpha systems are you thinking of here? I know that at least the
AXPvme boards have lots of distinct interrupt mask bits, and the PALcode
uses them to simulate real numbered interrupt levels.

Todd Whitesel
toddpw @ best.com