82801FB Datasheet, PDF (443/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

IDE Controller Registers (D31:F1)
11.1.12
.
PCNL_BAR—Primary Control Block Base Address
Register (IDE—D31:F1)
Address Offset: 14h–17h
Default Value: 00000001h
Attribute: R/W, RO
Size:
32 bits
Bit
Description
31:16
15:2
1
0
Reserved
Base Address — R/W. Base address of the I/O space (4 consecutive I/O locations).
Reserved
Resource Type Indicator (RTE) — RO. Hardwired to 1 indicating a request for I/O space.
NOTE: This 4-byte I/O space is used in native mode for the Primary Controller’s Command Block.
11.1.13
SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F1)
Address Offset: 18h–1Bh
Default Value: 00000001h
Attribute: R/W, RO
Size:
32 bits
Bit
Description
31:16 Reserved
15:3 Base Address — R/W. Base address of the I/O space (8 consecutive I/O locations).
2:1 Reserved
0 Resource Type Indicator (RTE) — RO. Hardwired to 1 indicating a request for I/O space.
NOTE: This 4-byte I/O space is used in native mode for the Secondary Controller’s Command Block.
11.1.14
SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F1)
Address Offset: 1Ch–1Fh
Default Value: 00000001h
Attribute: R/W, RO
Size:
32 bits
Bit
Description
31:16 Reserved
15:2 Base Address — R/W. Base address of the I/O space (4 consecutive I/O locations).
1 Reserved
0 Resource Type Indicator (RTE) — RO. Hardwired to 1 indicating a request for I/O space.
NOTE: This 4-byte I/O space is used in native mode for the Secondary Controller’s Command Block.
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
443