Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

17.5.VBLANK—Vertical Blank Register

Address Offset:

 

60010h

 

Default Value:

 

00000000h

 

Access:

 

 

Read/Write

 

Size:

 

 

32 bits

 

31

28

27

16

 

 

 

 

Reserved

 

Vertical Blank End

 

 

 

 

 

 

 

 

15

12

11

0

 

 

 

 

Reserved

 

Vertical Blank Start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

Description

 

 

 

 

 

 

 

 

31:28

Reserved.

 

 

 

 

 

 

 

 

27:16

Vertical Blank End. Vertical blank end expressed in terms of absolute line number relative to the

 

 

 

 

vertical active display start. Note: Vertical blank will be deasserted when vertical total occurs

 

 

 

 

irrespective of what is programmed in vertical blank end.

 

 

 

 

 

 

 

 

15:12

Reserved.

 

 

 

 

 

 

 

 

11:0

Vertical Blank Start. Vertical blank start expressed in terms of absolute line number relative to the

 

 

 

 

vertical active display start.

 

 

 

 

 

 

 

 

 

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Image 337
Intel 815 manual VBLANK-Vertical Blank Register