Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

16.1.11. INSTPM—Instruction Parser Mode Register

Address Offset:

020C0h

Default Value:

00h

Access:

Read/Write

Size:

8 bits

The bits in this register control the operation of the Instruction Parser.

Note: If an instruction type is disabled, the parser will read it out of the instruction / batch FIFO but will not send it to its destination. Error checking will be performed.

 

 

7

 

6

5

 

4

3

2

1

0

 

 

Reserved

Enable

Enable

 

Disable

 

Disable

Disable

Disable

Disable

 

 

 

 

 

 

Sync

Sync

 

Mcomp

 

GDI Blitter

Render

State

Render

 

 

 

 

 

 

Packet

Packet

 

Instrs

 

Instrs

(3D/Stretc

Variable

Palette

 

 

 

 

 

 

AGP Flush

Flush

 

 

 

 

h) Instrs

Updates

Updates

 

 

 

 

 

 

(Rsvd)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

Enable Sync AGP Flush. Enable pipe and AGP flush. Set by software and cleared by the parser on

 

 

 

 

detecting graphics pipe flushed before parsing a subsequent packet.

 

 

 

 

 

 

1

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Cleared by graphics controller

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

Enable Sync flush. Enable pipe flush. Set by software and cleared by the parser on detecting graphics

 

 

 

 

pipe flushed before parsing a subsequent packet.

 

 

 

 

 

 

 

1

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Cleared by graphics controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

Disable Mcomp Instructions. Disable processing of mcomp instructions by parser.

 

 

 

 

 

1

= Disable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

Disable GDI Blitter Instructions. Disable processing of Blitter instructions

 

 

 

 

 

 

1

= Disable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

Disable Render (3D/Stretch) Instructions. Disable processing of 3D instructions (Client 00h) by

 

 

 

 

parser.

 

 

 

 

 

 

 

 

 

 

 

 

1 = Disable

 

 

 

 

 

 

 

 

 

 

 

 

0 = Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Disable State Variable Updates.

 

 

 

 

 

 

 

 

 

 

1

= Disable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

Disable Render Palette Updates.

 

 

 

 

 

 

 

 

 

 

1

= Disable

 

 

 

 

 

 

 

 

 

 

 

 

0

= Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 314
Intel 815 manual INSTPM-Instruction Parser Mode Register, Disable State Variable Updates