Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

16.2.3.IIR—Interrupt Identity Register

Address Offset:

020A4h

Default Value:

0000h

Access:

Read/Write Clear

Size:

16 bits

The individual interrupt(s), which occurred, are determined via this register. The bit is set by the interrupt event and held until cleared by writing a ‘1’ into the bit position.

15

 

 

14

13

12

11

10

9

8

 

 

HW

 

Reserved

Sync

Pri Dply

Reserved

Overlay 0

Reserved

 

 

Detect

 

 

 

Status

Flip

 

Flip

 

 

 

Error

 

 

 

Toggle

Pending

 

Pending

 

 

 

Master

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

6

5

4

3

2

1

0

 

 

Pri Dply

Pri Dply

Reserved

Reserved

Reserved

Reserved

User

Breakpoint

 

 

VBLANK.

Event

 

 

 

 

Defined

 

 

 

 

 

 

 

 

 

 

 

Interrupt

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

15:0

 

Interrupt Identity. See. Table 17

 

 

 

 

 

 

 

 

1 = Interrupt occurred.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 324
Intel 815 manual IIR-Interrupt Identity Register, Interrupt Identity. See. Table