5-30
www.hp.com
Technical Reference Guide
Input/Output Interfaces
5.8.4 Audio Programming
Audio subsystem programming consists of configuration, typically accomplished during POST,
and control, which occurs during runtime.
Audio Configuration
The audio subsystem is configured according to PCI protocol through the HD audio controller
function of the 82801 ICH. Table 5-22 lists the PCI configuration registers of the audio
subsystem.
NOTE:
Values without “h” suffix (denoting hexidecimal value) are decimal.
[1] Refer to Intel data sheet for more information.
Table 5-22.
HD Audio Controller
PCI Configuration Registers (82801 Device 27/Function 0)
PCI Config.
Address
Register
Value on
Reset
PCI
Config.
Address
Register
Value on
Reset
00-01h
Vendor ID
8086h
14-17h
HD Audio Upper
Base. Addr.
0
02-03h
Device ID
24D5h
2C-2Dh
Subsystem Vender ID
0000h
04-05h
PCI Command
0000h
2E-2Fh
Subsystem ID
0000h
06-07h
PCI Status
0280h
34h
Capability List Pointer
50h
08h
Revision ID
XXh
3Ch
Interrupt Line
00h
09h
Programming
00h
3Dh
Interrupt Pin
02h
0Ah
Sub-Class
01h
40h
HD Audio Control
0’s
0Bh
Base Class Code
04h
44h
Traffic Class Select
00h
0Eh
Header Type
00h
4C, 4Dh
Docking
Control/Status
0080h
10-13h
HD Audio Lower Base
Addr.
4
50-14Fh
-HD audio functions
[1]
Содержание Compaq dc7700 CMT
Страница 8: ...1 2 www hp com Technical Reference Guide Introduction ...
Страница 152: ...8 18 www hp com Technical Reference Guide BIOS ROM ...
Страница 172: ...A 20 www hp com Technical Reference Guide Error Messages and Codes ...
Страница 176: ...B 4 www hp com Technical Reference Guide ASCII Character Set ...
Страница 194: ...C 18 www hp com Technical Reference Guide Keyboard ...