On Tue, Jul 24, 2001 at 08:34:48AM -0500, Todd Gruhn's account wrote:
> 
> Yesterday Bill O'Neill wrote:
> 
> >I really wanted to try the Promise Ultra/100TX2 due to its capability to use
> >the 66MHZ PCI interface  and also the Intel PRO/1000T due to its using both
> >the 64-bit and 66MHZ PCI interface, but I understand someone has to write
> >support for these.
> 
> I recall having a discussion about a 64bit graphics card (Matrox Mill II).
> I was told that what made it a 64bit card was the presence of 64bit registers,
> and that all PCI slots pass 32b data. Can someone enlighten me here...

The slots have additional pins, with a division. Just like you can
(generally) put 16-bit ISA cards in 8-bit slots, and the card hangs over
the edge - PCI defined that in the spec well up front.

Take a look here: http://www.compute-aid.com/64bitpci.html

-- 
David Maxwell, david@vex.net|david@maxwell.net -->
All this stuff in twice the space would only look half as bad!
					      - me