Any way to force a 64-bit transaction

[Michael Richardson <mcr@solidum.com>]

  We have a 64/66 card.
  We are testing it against a Micron Samurai chipset motherboard with
an Intel processor.

  We are looking for a way to *force* a 64-bit write from our (PIII) CPU to
our device so that we can test our handling of 64-bit operations. So far
we have been unable to find a way to do this.

  Does anyone have any suggestions? Does it matter how we map the device?
(Cacheable vs non-cachable) Are there any extra instructions on PIII that 
might help us? Since it is really a 32-bit CPU with a 64-bit external bus,
there is not (to my knowledge) a 64-bit write.

   :!mcr!:            |  Solidum Systems Corporation, http://www.solidum.com
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