Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

16.1.6.HWS_PGA—Hardware Status Page Address Register

Address Offset:

02080h

Default Value:

1FFFF000h.

Access:

Read/Write

Size:

32 bits

Hardware status page physical address. The programmed address should be 4 KB aligned. Bits [11:0] are hardwired to 0. This Page will be used to report hardware status into system memory as follows.

Note: For the GMCH bits 31:29 must be “0”.

 

31

29

28

12

11

0

 

 

Must be 0s

 

 

Base Physical Address of Status

 

0s (hardwired)

 

 

 

 

 

Page [28:12]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DWord

 

 

Description

 

 

 

Offset

 

 

 

 

 

 

0Report Interrupt Status Register.

1Report Low Priority Ring Head Pointer.

2Report Interrupt Ring Head Pointer.

3Reserved for other ring.

(1K-1): 4

Can be Written through indexed store DWord instruction.

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Intel 815 manual HWSPGA-Hardware Status Page Address Register, DWord Description Offset