Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

16.2.1.HWSTAM—Hardware Status Mask Register

Address Offset:

02098h

Default Value:

FFFFh

Access:

Read/Write

Size:

16 bits

This register has the same format as the Interrupt Control Registers. The corresponding bits are the mask bits that prevent that bit in the Interrupt Status Register from generating a PCI write cycle. Any unmasked interrupt bit (set to 0) will allow the Interrupt Status Register to be written to the address specified by the Hardware Status Vector Address Register when the Interrupt Status Register changes state.

 

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 Status Mask Bits.

 

 

 

 

 

 

0 = Not Masked.

1 = Masked (prevents PCI write cycle.).

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Page 322
Image 322
Intel 815 manual HWSTAM-Hardware Status Mask Register, Bit