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©2008 Advanced Micro Devices, Inc.
HD Audio Controllers Registers
AMD SB600 Register Reference Manual Proprietary Page 248
Stream Descriptor BDL Pointer Lower Base Address – RW – 32 bits
Input Stream 0 - [Mem_Reg: Base + 98h]
Input Stream 1 - [Mem_Reg: Base + B8h]
Input Stream 2 - [Mem_Reg: Base + D8h]
Input Stream 3 - [Mem_Reg: Base + F8h]
Output Stream 0 - [Mem_Reg: Base + 138h]
Output Stream 2 - [Mem_Reg: Base + 158h]
Output Stream 3 - [Mem_Reg: Base + 178h]
Field Name Bits Default Description
Reserved 6:0 00h Hardwired to 0’s to force 128 byte alignment of the BDL.
Buffer Descriptor List
Lower Base Address
31:7 0000000h Upper 25 bits of the lower 32 bit address of the Buffer
Descriptor List. This value should not be modified except
when the Run bit is “0”.
Stream Descriptor BDL Pointer Upper Base Address – RW – 32 bits
Input Stream 0 - [Mem_Reg: Base + 9Ch]
Input Stream 1 - [Mem_Reg: Base + BCh]
Input Stream 2 - [Mem_Reg: Base + DCh]
Input Stream 3 - [Mem_Reg: Base + FCh]
Output Stream 0 - [Mem_Reg: Base + 11Ch]
Output Stream 1 - [Mem_Reg: Base + 13Ch]
Output Stream 2 - [Mem_Reg: Base + 15Ch]
Output Stream 3 - [Mem_Reg: Base + 17Ch]
Field Name Bits Default Description
Buffer Descriptor List
Upper Base Address
31:0 00000000
h
Upper 32 bit address of the Buffer Descriptor List. This
value should not be modified except when the Run bit is
“0”.
Wall Clock Counter Alias – R – 32 bits – [Mem_Reg: Base + 2030h]
Field Name Bits Default Description
Wall Clock Counter Alias 31:0 00000000
h
An alias of the Wall Clock Counter register at offset 30h. It
behaves exactly the same as if the Wall Clock Counter
register were being read directly.
Stream Descriptor Link Position in Buffer Alias – R – 32 bits
Input Stream 0 - [Mem_Reg: Base + 2084h]
Input Stream 1 - [Mem_Reg: Base + 20A4h]
Input Stream 2 - [Mem_Reg: Base + 20C4h]
Input Stream 3 - [Mem_Reg: Base + 20E4h]
Output Stream 0 - [Mem_Reg: Base + 2104h]
Output Stream 1 - [Mem_Reg: Base + 2124h]
Output Stream 2 - [Mem_Reg: Base + 2144h]
Output Stream 3 - [Mem_Reg: Base + 2164h]
Field Name Bits Default Description
Link Position in Buffer
Alias
31:0 00000000
h
An alias of the Link Position in Buffer register of each
Stream Descriptor.