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SubjectRe: ix86 Atomic ops during DMA...
On  9 Aug, Richard B. Johnson wrote:

How about:

lock andl (%ebx),0xffffffff

Not sure 100% if I have the arguments in the right order ;-).


> I need...
>
> movl (%ebx), %eax # Read status from register in ebx
> movl %eax, (%ebx) # Write it back
>
> ..to occur together without the bus being taken away by a DMA
> operation until these two instructions are complete.

--
Bart Hartgers - TUE Eindhoven
http://plasimo.phys.tue.nl/bart/contact/
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