> >Since it's not really explained out there that I can see, will portmeister
> 
> Without DUMMY_NOPS, operations that go out to the CPU's I/O ports are
> padded with NOPS, so that slower motherboards can keep up.  With
> DUMMY_NOPS, the NOPS are removed, making I/O operations faster (or
> actually, normal speed -- not slower).
> 
> Hopefully, no motherboards that require these NOPS have been made for
> years.  Certainly, all the motherboards I have owned over the last
> five years have worked with DUMMY_NOPS.

Perhaps it's time to update this. Rename it to 

#options	ADD_NOPS	# For slow (<1993) motherboards

default	it to commented out and invert the logic where used in the source?

							David Maxwell