Intel D425 AU80610006252AA 用户手册

Datasheet 

 153 

B/D/F/Type: 0/2/0/PCI 

IO 

Address Offset: 

4-7h 

Default Value: 

00000000h 

Access: RW; 

Size: 32 

bits 

MMIO_DATA: A 32 bit IO write to this port is re-directed to the MMIO register/GTT 
location pointed to by the MMIO-index register. A 32 bit IO read to this port is re-

directed to the MMIO register address pointed to by the MMIO-index register 

regardless of the target selection in MMIO_INDEX(1:0). 8 or 16 bit IO writes are 
completed by the CPU UNCORE and may have un-intended side effects, hence must 

not be used to access the data port. 8 or 16 bit IO reads are completed normally. 

Note that if the target field in MMIO Index selects "GTT", reads to MMIO data return is 

undefined. 

 

 

31:0 RW 00000000h 

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