
SiI0680A PCI to IDE/ATA 
Data Sheet
Address 
Offset 
Silicon Image, Inc. 
 2006 Silicon Image, Inc.  
SiI-DS-0069-C
70 
Register Name 
31                                
16 
15                                
00 
Access 
Type 
64
H
Reserved 
- 
68
H
FIFO Byte1 Write 
Pointer – IDE0 
FIFO Byte1 Read 
Pointer – IDE0 
FIFO Byte0 Write 
Pointer – IDE0 
FIFO Byte0 Read 
Pointer – IDE0 
R 
6C
H
FIFO Byte3 Write 
Pointer – IDE0 
FIFO Byte3 Read 
Pointer – IDE0 
FIFO Byte2 Write 
Pointer – IDE0 
FIFO Byte2 Read 
Pointer – IDE0 
R 
70
H
FIFO Port – IDE1 
R/W 
74
H
Reserved 
- 
78
H
FIFO Byte1 Write 
Pointer – IDE1 
FIFO Byte1 Read 
Pointer – IDE1 
FIFO Byte0 Write 
Pointer – IDE1 
FIFO Byte0 Read 
Pointer – IDE1 
R 
7C
H
FIFO Byte3 Write 
Pointer – IDE1 
FIFO Byte3 Read 
Pointer – IDE1 
FIFO Byte2 Write 
Pointer – IDE1 
FIFO Byte2 Read 
Pointer – IDE1 
R 
80
H
IDE0 TF Starting 
Sector Number 
IDE0 TF      Sector 
Count 
IDE0 TF Features  
IDE0 TF Error 
IDE0 TF Data 
R/W 
84
H
IDE0 TF 
Command+Status 
IDE0 TF     
Device+Head 
IDE0 TF   Cylinder 
High 
IDE0 TF   Cylinder 
Low 
R/W 
88
H
Reserved 
IDE0 TF     Device 
Control Auxiliary 
Status 
Reserved 
Reserved 
R/W 
8C
H
IDE0 Read Ahead Data 
R/W 
90
H
IDE0 TF Starting 
Sector Number2 
IDE0 TF      Sector 
Count2 
IDE0 TF 
Features2 IDE0 
TF Error2 
Reserved 
R/W 
94
H
IDE0 TF 
Cmd+Sts2 
IDE0 TF     
Device+Head2 
IDE0 TF   Cylinder 
High2 
IDE0 TF   Cylinder 
Low2 
R/W 
98
H
Reserved 
- 
9C
H
IDE0 Virtual DMA/PIO Read Ahead Byte Count 
R/W 
A0
H
IDE0 TF Timing 
IDE0           Config 
+ Status 
IDE0              Cmd 
+ Status 
R/W 
A4
H
IDE0 Device 1 PIO Timing 
IDE0 Device 0 PIO Timing 
R/W 
A8
H
IDE0 Device 1 DMA Timing 
IDE0 Device 0 DMA Timing 
R/W 
AC
H
IDE0 Device 1 UDMA Timing 
IDE0 Device 0 UDMA Timing 
R/W 
B0
H
IDE0 Test Register 
R/W 
B4
H
Reserved 
IDE0 Data 
Transfer Mode 
R/W 
B8
H
Reserved 
- 
BC
H
Reserved 
- 
C0
H
IDE1 TF Starting 
Sector Number 
IDE1 TF      Sector 
Count 
IDE1 TF Features  
IDE1 TF Error 
IDE1 TF Data 
R/W 
C4
H
IDE1 TF 
Command+Status 
IDE1 TF     
Device+Head 
IDE1 TF   Cylinder 
High 
IDE1 TF   Cylinder 
Low 
R/W 
C8
H
Reserved 
IDE1 TF     Device 
Control Auxiliary 
Status 
Reserved 
R/W