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©2008 Advanced Micro Devices, Inc.
AC ’97 Controller Functional Descriptions
AMD SB600 Register Reference Manual Proprietary Page 223
Output DMA 1/2/3 Threshold – RW - 32 bits - [MEM_Reg: 34h]
Field Name Bits Default Description
out DMA #1 State 2:0 0h Current state of out DMA # 1 (Modem 1 for slot 5)
[Read-only]
out DMA #2 State 5:3 0h Current state of out DMA # 2 (Modem 2 for slot 10)
[Read-only]
out DMA #3 State 8:6 0h Current state of out DMA # 3 (Handset for slot 11)
[Read-only]
Reserved 15:9 00h
Output Threshold 1 20:16 00h Threshold value for the Out DMA 1 FIFO. (FIFO size
4x20)
Output Threshold 2 25:21 00h Threshold value for the Out DMA 2 FIFO. (FIFO size
4x20)
Output Threshold 3 30:26 00h Threshold value for the Out DMA 3 FIFO. (FIFO size
4x20)
Reserved 31 0b
Output DMA1/2/3 Threshold Register: Configure Slot responsibility for Output channels 0 and also threshold values
of all out DMA FIFO's.
Output DMA1 Link List Pointer – RW - 32 bits - [MEM_Reg: 38h]
Field Name Bits Default Description
out DMA1 LL ptr en. 0 0b Output DMA1 Link List Pointer enable
out DMA1 LL ptr 31:1 0000_0000h Pointer to the start of the Link List - to the first DT.
Output DMA1 Link List Pointer Register:
Output DMA2 Link List Pointer – RW - 32 bits - [MEM_Reg: 3Ch]
Field Name Bits Default Description
out DMA2 LL ptr en. 0 0b Output DMA2 Link List Pointer enable
out DMA2 LL ptr 31:1 0000_0000h Pointer to the start of the Link List - to the first DT.
Output DMA2 Link List Pointer Register:
Output DMA3 Link List Pointer – RW - 32 bits - [MEM_Reg: 40h]
Field Name Bits Default Description
out DMA3 LL ptr en. 0 0b Output DMA3 Link List Pointer enable
out DMA3 LL ptr 31:1 0000_0000h Pointer to the start of the Link List - to the first DT.
Output DMA3 Link List Pointer Register:
Output DMA1 DT Start – R - 32 bits - [MEM_Reg: 44h]
Field Name Bits Default Description
out DMA1 DT start 31:0 0000_0000h Pointer to the start of data associated with current DT
for the Output DMA1.
Output DMA1 Discrete Table (DT) Start Pointer Register:
Output DMA1 DT Next– R - 32 bits - [MEM_Reg: 48h]
Field Name Bits Default Description
out DMA1 DT next 31:0 0000_0000h Pointer to the next DT for the Output DMA1
Output DMA1 DT Next Pointer Register:
Output DMA1 DT Current– R - 32 bits - [MEM_Reg: 4Ch]
Field Name Bits Default Description
out DMA1 DT current 31:0 0000_0000h Pointer to the currently accessing memory address for
the Output DMA1.
Output DMA1 DT Current Pointer Register: