
Silicon Image, Inc. 
9.7.40
IDE1 Task File Register 1 
Address Offset: C4
H 
Access Type: Read/Write 
Reset Value: 0x0000_0000 
SiI0680A PCI to IDE/ATA  
Data Sheet
 2006 Silicon Image, Inc. 
SiI-DS-0069-C
95 
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
IDE1 Task File Command + Status 
IDE1 Task File Device+Head 
IDE1 Task File Cylinder High 
IDE1 Task File Cylinder Low 
This register defines one of the IDE Channel #1 Task File registers in the SiI 0680A. Access to these bit fields is permitted if 
the PCI bus Byte Enable is active for one byte only. The register bits are defined below.  
Bit [31:24]
:  IDE1 Task File Command (W).  This write-only bit field defines the IDE1 Task File Command 
register. 
Bit [31:24]
:  IDE1 Task File Status (R).  This read-only bit field defines the IDE1 Task File Status register. 
Bit [23:16]
:  IDE1 Task File Device+Head (R/W).  This bit field defines the IDE1 Task File Device and Head 
register. 
Bit [15:08]
:  IDE1 Task File Cylinder High (R/W).  This bit field defines the IDE1 Task File Cylinder High register. 
Bit [07:00]
:  IDE1 Task File Cylinder Low (R/W).  This bit field defines the IDE1 Task File Cylinder Low register. 
9.7.41
IDE1 Task File Register 2 
Address Offset: C8
H 
Access Type: Read/Write 
Reset Value: 0x0000_0000 
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Reserved 
IDE1 Task File Device Control     
IDE1 Task File Auxiliary Status 
Reserved 
Reserved 
This register defines one of the IDE Channel #1 Task File registers in the SiI 0680A. Access to these bit fields is permitted if 
the PCI bus Byte Enable is active for one byte only. The register bits are defined below.  
Bit [31:24]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [23:16]
:  IDE1 Task File Device Control (W).  This bit field defines the IDE1 Task File Device Control register. 
Bit [23:16]
:  IDE1 Task File Auxiliary Status (R).  This bit field defines the IDE1 Task File Auxiliary Status 
register. 
Bit [15:00]
:  Reserved (R).  This bit field is reserved and returns zeros on a read.