Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

20.3.4.DPLYBASE—Display Base Address Register

Memory Offset Address:

70020h

Default:

0000h

Attributes:

Read/Write

The display can be read from graphics memory. This register is the display staging register when written. The load register is transferred into the active register on the asserting edge of Vertical Sync. The read back register is from the active register.

31

26

25

3

2

0

 

 

 

Reserved

Display Base Address Bits

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

Descriptions

 

 

 

 

 

 

 

 

 

 

31:26

Reserved. Bits <27:26> are implemented as scratch bits.

 

 

 

 

 

 

 

 

 

 

25:3

Display Base Address Bits [25:03]. This is the base address of the display.

 

 

 

 

 

 

 

 

 

 

 

2:0

Reserved.

 

 

 

 

 

 

 

 

 

 

 

 

 

358

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Image 358
Intel 815 manual DPLYBASE-Display Base Address Register