HP dx7300 5.8.4 Audio Programming, Audio Configuration, Table, HD Audio Controller, PCI Configuration Registers (82801 Device 27/Function 0)

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.

Table 5-22.

HD Audio Controller

PCI Configuration Registers (82801 Device 27/Function 0)

			PCI
PCI Config.		Value on	Config.		Value on
Address	Register	Reset	Address	Register	Reset
00-01h	Vendor ID	8086h	14-17h	HD Audio Upper	0
				Base. Addr.
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	0080h
				Control/Status
10-13h	HD Audio Lower Base	4	50-14Fh	-HD audio functions	[1]
	Addr.

NOTE:

Values without “h” suffix (denoting hexidecimal value) are decimal. [1] Refer to Intel data sheet for more information.

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