82801CA Datasheet, PDF (369/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

IDE Controller Registers (D31:F1)
10.1.10 PCMD_BAR—Primary Command Block Base Address
Register (IDE—D31:F1)
Address Offset: 10h–13h
Default Value: 00000001h
.
Attribute:
Size:
R/W
32 bits
Bit
31:16
15:3
2:1
0
Description
Reserved.
Base Address—R/W. Base address of the I/O space (8 consecutive I/O locations).
Reserved.
Resource Type Indicator (RTE)—This bit is set to one, indicating a request for I/O space.Read-
Only.
Note: This 8-byte I/O space is used in native mode for the Primary Controller’s Command Block.
10.1.11 PCNL_BAR—Primary Control Block Base Address Register
(IDE—D31:F1)
Address Offset: 14h–17h
Default Value: 00000001h
.
Attribute:
Size:
R/W
32 bits
Bit
31:16
15:2
1
0
Description
Reserved.
Base Address—R/W. Base address of the I/O space (4 consecutive I/O locations).
Reserved.
Resource Type Indicator (RTE)—This bit is set to one, indicating a request for I/O space.Read-
Only.
Note: This 4-byte I/O space is used in native mode for the Primary Controller’s Command Block.
10.1.12
SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F1)
Address Offset: 18h–1Bh
Default Value: 00000001h
Attribute:
Size:
R/W
32 bits
Bit
31:16
15:3
2:1
0
Description
Reserved.
Base Address—R/W. Base address of the I/O space (8 consecutive I/O locations).
Reserved.
Resource Type Indicator (RTE)—This bit is set to one, indicating a request for I/O space.Read-
Only.
Note: This 4-byte I/O space is used in native mode for the Secondary Controller’s Command Block.
Intel^® 82801CA ICH3-S Datasheet
369