>    Bill> data path. I don't think that the PIII has 64-bit address modes
>          (the name ia32 says a lot :-) . As long as it's using a 32-but
>          address space,
>
>  Yes, I have since learned this. We will be getting a Micron 64bit/66Mhz
>motherboard.  It has a PII on it. I don't know if/how it can make 64 bit
>access, perhaps some hacks in the bridge.

Actually, the P6 architecture added a 36 bit addressing mode which I
believe is also available in the PII and PIII.  I can't remember which
chipset it is, but there is at least one made by Intel that supports
33bit addressing for use with these processors.

--
Justin