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©2008 Advanced Micro Devices, Inc.
AC ’97 Controller Functional Descriptions
AMD SB600 Register Reference Manual Proprietary Page 208
Input DMA DT Current- R - 32 bits - [MEM_Reg: 2Ch]
Field Name Bits Default Description
in DMA DT current 31:0 0000_0
000h
Pointer to the currently accessing memory address for the input
DMA.
Input DMA DT Current Pointer Register:
Input DMA DT Size & FIFO Info- R - 32 bits - [MEM_Reg: 30h]
Field Name Bits Default Description
in DMA DT size 15:0 0000h Data size of DT for input DMA.
in FIFO Used 20:16 00h Number of filled FIFO entries of input DMA.
in FIFO Free 25:21 1eh Number of free FIFO entries of input DMA.
in DMA state 28:26 0h Current state of in DMA
Reserved 31:29 0h
Input DMA DT Size & FIFO info Register: Size of data associated with DT for input channels and number of FIFO
entries free and used for the input channels.
Output DMA Slot Enable & Threshold- RW - 32 bits - [MEM_Reg: 34h]
Field Name Bits Default Description
out DMA Slot enable 9:0 000h Slot enable for audio output.
[0] = 1 Enable slot 3
[1] = 1 Enable slot 4
|
[9] = 1 Enable slot 12
Reserved 10 0b
Out DMA Threshold 17:11 00h Threshold value for the Out DMA FIFO. (FIFO size 90x20)
Reserved 31:18 0000h
Output DMA Slot Enable & Threshold Register: Configure Slot responsibility for Output channels 0 and also
threshold values of out DMA FIFO's.
Output DMA Link List Pointer- RW - 32 bits - [MEM_Reg: 38h]
Field Name Bits Default Description
out DMA Link List
Pointer En
0 0b Output DMA Link List Pointer enable
out DMA Link List
Pointer
31:1 0000_0
000h
Pointer to the start of the Link List - to the first DT.
Output DMA Link List Pointer Register:
Output DMA DT Start- R - 32 bits - [MEM_Reg: 3Ch]
Field Name Bits Default Description
out DMA DT start 31:0 0000_0
000h
Pointer to the start of data associated with current DT for the Output
DMA.
Output DMA Discrete Table (DT) Start Pointer Register:
Output DMA DT Next- R - 32 bits - [MEM_Reg: 40h]
Field Name Bits Default Description
out DMA DT next 31:0 0000_0
000h
Pointer to the next DT for the Output DMA
Output DMA DT Next Pointer Register:
Output DMA DT Current- R - 32 bits - [MEM_Reg: 44h]
Field Name Bits Default Description
out DMA DT current 31:0 0000_0
000h
Pointer to the currently accessing memory address for the Output
DMA.
Output DMA DT Current Pointer Register: