82801BA Datasheet, PDF (398/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

AC’97 Audio Controller Registers (D31:F5)
13.1.7
13.1.8
13.1.9
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
HEDT—Header Type Register (Audio—D31:F5)
Address Offset: 0Eh
Default Value: 00h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Bit
7:0 Header Type Value. Hardwired to 00h.
Description
13-4
82801BA ICH2 and 82801BAM ICH2-M Datasheet