82801FB Datasheet, PDF (462/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

SATA Controller Registers (D31:F2)
12.1.12
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
15:3
2:1
0
Reserved
Base Address — R/W. This field provides the base address of the I/O space (8 consecutive I/O
locations).
Reserved
Resource Type Indicator (RTE) — RO. Hardwired to 1 to indicate 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.
12.1.13
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
15:2
1
0
Reserved
Base Address — R/W. This field provides the base address of the I/O space (4 consecutive I/O
locations).
Reserved
Resource Type Indicator (RTE) — RO. Hardwired to 1 to indicate 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.
12.1.14
BAR — Legacy Bus Master Base Address Register
(SATA–D31:F2)
Address Offset: 20h–23h
Default Value: 00000001h
Attribute: R/W, RO
Size:
32 bits
The Bus Master IDE interface function uses Base Address register 5 to request a 16-byte I/O space
to provide a software interface to the Bus Master functions. Only 12 bytes are actually used
(6 bytes for primary, 6 bytes for secondary). Only bits [15:4] are used to decode the address.
Bit
Description
31:16
15:4
3:1
0
Reserved
Base Address — R/W. This field provides the base address of the I/O space (16 consecutive I/O
locations).
Reserved
Resource Type Indicator (RTE) — RO. Hardwired to 1 to indicate a request for I/O space.
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Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet