Register Name Address Offset
Control 140h
Status 143h
Link Position in Current Buffer 144h
Cyclic Buffer Length 148h
Last Valid Index 14Ch
FIFO Size 150h
Stream Format 152h
Buffer Descriptor Lower Base Address 158h
Buffer Descriptor Upper Base Address 15Ch
Control 160h
Status 163h
Link Position in Current Buffer 164h
Cyclic Buffer Length 168h
Last Valid Index 16Ch
FIFO Size 170h
Stream Format 172h
Buffer Descriptor Lower Base Address 178h
Buffer Descriptor Upper Base Address 17Ch
Wall Clock Counter Alias 2030h
Input Stream Descriptor 0 - Link Position in Current Buffer Alias 208 4h
Input Stream Descriptor 1 - Link Position in Current Buffer Alias 20A4h
Input Stream Descriptor 2 - Link Position in Current Buffer Alias 20C4h
Input Stream Descriptor 3 - Link Position in Current Buffer Alias 20E4h
Output Stream Descriptor 0 - Link Position in Current Buffer Alias 2104h
Output Stream Descriptor 1 - Link Position in Current Buffer Alias 2124h
Output Stream Descriptor 2 - Link Position in Current Buffer Alias 2144h
Output Stream Descriptor 3 - Link Position in Current Buffer Alias 2164h
Global Capabilities – R – 16 bits - [Mem_Reg: Base + 00h] Field Name Bits Default Description
64 Bit Address Supported 0 1b Hardwired to “1”. Indicates that 64-bit addressing capability
is supported by the HD Audio controller for BDL, Data
Buffer, Command Buffer, and Response Buffer addresses.
Number of Serial Data
Output Signals
2:1 0h Hardwired to “0”. Indicates that one SDO line is supported.
Number of Bidirectional
Streams Supported
7:3 0h Hardwired to “0”. Indicates that bidirectional stream is not
supported.
Number of Input Streams
Supported
11:8 4h 4 Input Streams are supported.
Number of Output
Streams Supported
15:12 4h 4 Output Streams are supported.
Field Name Bits Default Description
Minor Version 7:0 00h Hardwired to “0”.
Field Name Bits Default Description
Major Version 7:0 01h Hardwired to 01h.