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querries on PCI

Answers are welcome for the following querries on PCI.
Here they go.

I have got the PCI 2.1 rev  specs.

I am dealing with 64 bit PCI.

1. What are the commands that are supported in the C/BE[7:4] pins.
Where do I find the commands list?
During this address phase what the C/BE[3:0] contain?

2. Does the target need to assert both DEVSEL# and ACK64#?

3. Do the PAR and PAR64 represent the corresponding parities
   (for lower 32 and upper 32 respectively along with the corresponding
    C/BEs) ? Will both signals be asserted ?



Thanks in advance

Botlaguduru. S
11th Nov 1998