HP DC71XX, DX61XX 5.8.4 Audio Programming, Audio Configuration, Table, AC97 Audio Controller, PCI Configuration Registers (82801 Device 31/Function 5)

Input/Output Interfaces

5.8.4 Audio Programming

Audio subsystem programming consists configuration, typically accomplished during POST, and control, which occurs during runtime.

Audio Configuration

The audio subsystem is configured according to PCI protocol through the AC97 audio controller function of the 82801 ICH. Table 5-24 lists the PCI configuration registers of the audio subsystem.

Table 5-24.

AC97 Audio Controller

PCI Configuration Registers (82801 Device 31/Function 5)

			PCI
PCI Config.		Value on	Config.		Value on
Address	Register	Reset	Address	Register	Reset
00-01h	Vendor ID	8086h	14-17h	Native Audio Bus	1
				Mstr. Addr.
02-03h	Device ID	24D5h	18-1Bh	Reserved	1h
04-05h	PCI Command	0000h	1C-2Bh	Reserved	1h
06-07h	PCI Status	0280h	2C-2Dh	Subsystem Vender ID	0000h
08h	Revision ID	XXh	2E-2Fh	Subsystem ID	0000h
09h	Programming	00h	30-3Bh	Reserved	--
0Ah	Sub-Class	01h	3Ch	Interrupt Line	00h
0Bh	Base Class Code	04h	3Dh	Interrupt Pin	02h
0Eh	Header Type	00h	3E-FFh	Reserved	0’s
10-13h	Native Audio Mixer	1	--	--	--
	Base Addr.

Technical Reference Guide 361834-002 5-33