AMD SB600 Technical Reference Manual page 207

Field Name
SLOTREQ
Reserved
SLOTREQ Register
Field Name
Slot Counter
Reserved
Bit Clock Counter
Reserved
Counter Register
Field Name
Input Threshold
Reserved
Input FIFO Threshold Register: Input DMA's FIFOs threshold value.
Input DMA Link List Pointer- RW - 32 bits - [MEM_Reg: 20h]
Field Name
in DMA Link List
Pointer En
in DMA Link List
Pointer
Input DMA Link List Pointer Register:
Field Name
in DMA DT start
Input DMA Discrete Table (DT) Start Pointer Register:
Field Name
in DMA DT next
Input DMA DT Next Pointer Register:
©2008 Advanced Micro Devices, Inc.
AMD SB600 Register Reference Manual
Slot Request- R - 32 bits - [MEM_Reg: 14h]
Bits Default
9:0 000h The read only bits [0:9] of this field respectively come from
slot1[11:2] of AC link's SDATA_IN0/1/2 OR'ed together (even if slot
1 may not be valid as indicated by slot 0[14]). These bits [0:9]
respectively decide whether slot 3~12 of SDATA_OUT is allowed or
not.
0 – Slot is allowed
1 – Slot is allowed
Even if a bit in this field being 0 indicates a slot is allowed, the
controller further looks at reg0x34[9:0] to finally decide whether the
slot is enabled.
31:10 000000
h
Counter- R - 32 bits - [MEM_Reg: 18h]
Bits Default
3:0 0h The current slot number (0-12) which the AC97 controller handling.
7:4 0h
12:8 00h For tag slot, the value changes from 0 to F. For other slots the value
changes from 0 to 20.
31:13 00000h
Input FIFO Threshold- RW - 32 bits - [MEM_Reg: 1Ch]
Bits Default
4:0 00h Threshold value for the Input Channel's FIFOs. (FIFO size 16x20)
31:5 000000
0h
Bits Default
0 0b Input DMA Link List Pointer enable
31:1 0000_0 Pointer to the start of the Link List - to the first DT.
000h
Input DMA DT Start- R - 32 bits - [MEM_Reg: 24h]
Bits Default
31:0 0000_0 Pointer to the start of data associated with current DT for the input
000h DMA
Input DMA DT Next- R - 32 bits - [MEM_Reg: 28h]
Bits Default
31:0 0000_0 Pointer to the next DT for the input DMA
000h
Description
Description
Description
Description
Description
Description
AC '97 Controller Functional Descriptions
Proprietary Page 207