82801DB Datasheet, PDF (481/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

AC ’97 Audio Controller Registers (D31:F5)
Table 14-3. Native Audio Bus Master Control Registers (Sheet 1 of 2)
Offset
00h
04h
05h
06h
08h
0Ah
0Bh
10h
14h
15h
16h
18h
1Ah
1Bh
20h
24h
25h
26h
28h
2Ah
2Bh
2Ch
Mnemonic
Name
PI_BDBAR
PI_CIV
PI_LVI
PCM in Buffer Descriptor list Base Address
PCM in Current Index Value
PCM in Last Valid Index
PI_SR
PCM in Status
PI_PICB PCM in Position in Current Buffer
PI_PIV
PCM in Prefetched Index Value
PI_CR
PCM in Control
PO_BDBAR PCM out Buffer Descriptor list Base Address
PO_CIV
PO_LVI
PO_SR
PCM out Current Index Value
PCM out Last Valid Index
PCM out Status Register
PO_PICB PCM out Position In Current Buffer
PO_PIV PCM out Prefetched Index Value
PO_CR PCM out Control Register
MC_BDBAR Mic. in Buffer Descriptor List Base Address
MC_CIV Mic. in Current Index Value
MC_LVI
MC_SR
MC_PICB
Mic. in Last Valid Index
Mic. In Status Register
Mic. In Position In Current Buffer
MC_PIV Mic. in Prefetched Index Value
MC_CR Mic. in Control Register
GLOB_CNT Global Control
30h
GLOB_STA Global Status
34h
40–43h
44h
45h
46–47h
48–49h
4Ah
4Bh
50–53h
54h
55h
56–57h
58–59h
ACC_SEMA Codec Write Semaphore Register
MC2_BDBAR Mic. 2 Buffer Descriptor List Base Address
MC2_CIV Mic. 2 Current Index Value
MC2_LVI Mic. 2 Last Valid Index
MC2_SR Mic. 2 Status Register
MC2_PICB Mic 2 Position In Current Buffer
MC2_PIV Mic. 2 Prefetched Index Value
MC2_CR Mic. 2 Control Register
PI2_BDBAR PCM in 2 Buffer Descriptor List Base Address
PI2_CIV PCM in 2 Current Index Value
PI2_LVI PCM in 2 Last Valid Index
PI2_SR PCM in 2 Status Register
PI2_PICB PCM in 2 Position in Current Buffer
Default
00000000h
00h
00h
0001h
0000h
00h
00h
00000000h
00h
00h
0001h
0000h
00h
00h
00000000h
00h
00h
0001h
0000h
00h
00h
00000000h
00700000h
00h
00h
00h
0001h
0000h
00h
00h
00h
00000000h
00h
00h
0001h
0000h
Access
R/W
RO
R/W
R/WC, RO
RO
RO
R/W
R/W
RO
R/W
R/W
RO
RO
R/W
R/W
RO
R/W
R/W
RO
RO
R/W
R/W
RO, R/W,
R/WC
R/W
RO
R/W
R/W
RO
RO
R/W
RO
R/W
RO
R/W
R/W
RO
Intel^® 82801DB ICH4 Datasheet
481