> Would it be easier to use a "mask" instead?  i.e.:
> 
> sb0  at isa? port 0x220 irq 1 drqs 0x22	# 1,5
> gus0 at isa? port 0x300 irq 1 drqs 0xA0 # 5,7
It might be easier, but it's much less readable.
I prefer the computer figuring out where bits go
instead of me.

        -- Lennart