82801DB Datasheet, PDF (471/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

AC ’97 Audio Controller Registers (D31:F5)
14.1.5
14.1.6
14.1.7
14.1.8
RID—Revision Identification Register (Audio—D31:F5)
Offset:
Default Value:
Lockable:
08h
See Bit Description
No
Attribute:
Size:
Power Well:
RO
8 Bits
Core
Bit
Description
7:0
Revision Identification Value — RO. Refer to the ICH4 Specification Update for the value of the
Revision ID Register.
PI—Programming Interface Register (Audio—D31:F5)
Offset:
09h
Default Value: 00h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Bit
7:0 Programming Interface — RO.
Description
SCC—Sub Class Code Register (Audio—D31:F5)
Address Offset: 0Ah
Default Value: 01h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Bit
Sub Class Code — RO.
7:0
01h = Audio Device
Description
BCC—Base Class Code Register (Audio—D31:F5)
Address Offset: 0Bh
Default Value: 04h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Bit
Base Class Code — RO.
7:0
04h = Multimedia device
Description
Intel^® 82801DB ICH4 Datasheet
471