Audio Specifications - HP Compaq d330 DT Technical Reference Manual

Chapter 5 Input/Output Interfaces
Audio subsystem programming consists configuration, typically accomplished during POST, and
control, which occurs during runtime.
5.8.5.1 Audio Configuration
The audio subsystem is configured according to PCI protocol through the AC'97 audio controller
function of the 82801 ICH. Table 5-24 lists the PCI configuration registers of the audio
subsystem.
Table 5-24. AC'97 Audio Controller PCI Configuration Registers
PCI
Conf.
Addr. Register
00-01h Vender ID
02-03h Device ID
04-05h PCI Command
06-07h PCI Status
08h Revision ID
09h Programming
0Ah Sub-Class
0Bh Base Class Code
0Eh Header Type
10-13h Native Audio Mixer Base Addr.
5.8.5.2 Audio Control
The audio subsystem is controlled through a set of indexed registers that physically reside in the
audio codec . The register addresses are decoded by the audio controller and forwarded to the
audio codec over the AC97 Link Bus previously described. The audio codec's control registers
(Table 5-25) are mapped into 64 kilobytes of variable I/O space.
Table 5-25. AC'97 Audio Codec Control Registers
Offset
Addr. / Register
00h Reset
02h Master Vol.
04h Reserved
06h Mono Mstr. Vol.
08h Reserved
0Ah PC Beep Vol.
0Ch Phone In Vol.
0Eh Mic Vol.
10h Line In Vol.
12h CD Vol.

5.8.6 AUDIO SPECIFICATIONS

5-32 hp compaq d330 and d530 Series of Personal Computers
Featuring the Intel Pentium 4 Processor
AC'97 Audio Controller
PCI Configuration Registers (82801 Device 31/Function 5)
AC'97 Audio Codec Control Registers
Value
On Offset
Reset Addr. / Register
0100h 14h Video Vol.
8000h 16h Aux Vol.
-- 18h PCM Out Vol.
8000h 1Ah Record Sel.
-- 1Ch Record Gain
8000h 1Eh Reserved
8008h 20h Gen. Purpose
8008h 22h 3D Control
8808h 24h Reserved
8808h 26h Pwr Mgnt.
First Edition – June 2003
Table 5-24.
Value PCI
on Conf.
Reset Addr. Register
8086h 14-17h Native Audio Bus Mstr. Addr.
24D5h 18-1Bh Reserved
0000h 1C-2Bh Reserved
0280h 2C-2Dh Subsystem Vender ID
XXh 2E-2Fh Subsystem ID
00h 30-3Bh Reserved
01h 3Ch Interrupt Line
04h 3Dh Interrupt Pin
00h 3E-FFh Reserved
1 -- --
Table 5-25.
Value
On Offset
Reset Addr. / Register
8808h 28h Ext. Audio ID.
8808h 2Ah Ext. Audio Ctrl/Sts
8808h 2Ch PCM DAC SRate
0000h 32h PCM ADC SRate
8000h 34h Reserved
-- 72h Reserved
0000h 74h Serial Config.
0000h 76h Misc. Control Bits
-- 7Ch Vender ID1
000xh 7Eh Vender ID2
Value
on
Reset
1
1h
1h
0000h
0000h
--
00h
02h
0's
--
Value
On
Reset
0001h
0000h
BB80h
BB80h
--
--
7x0xh
0404h
4144h
5340h