> > jmp $+2
> JV> 
> JV> A little do-nothing meant to create a slight I/O delay by clearing
> JV> the prefetch queue and forcing the CPU to re-read memory. Not really 
> JV> effective anymore, better to use OUT 4Fh,AL and using the motherboard 
> JV> AT-BUS to provide a stable delay period.
> 
> Huuh ?  (4 am coder typing).  What's this OUT 4fh stuff ??  
I'll pass the responsibility of a more technical explanation on to
someone more knowledgeable than me, but basically the reasoning is that
when you perform an OUT there is a return from the motherboard before
the CPU can continue. The first page of ports are always on the 8MHz
bus, and port 4Fh is always unused, so a stable form of jmp $+2.
--- ifmail-tx (i386 Linux)
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