307013-003 Datasheet, PDF (606/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

IDE Controller Registers (D31:F1)
15.1.13 SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F1)
Address Offset: 18h–1Bh
Default Value: 00000001h
Attribute:
Size:
R/W, RO
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). If
this register is programmed, the programmed value must not be less than 100h.
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.
15.1.14 SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F1)
Address Offset: 1Ch–1Fh
Default Value: 00000001h
Attribute:
Size:
R/W, RO
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). If
this register is programmed, the programmed value must not be less than 100h.
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.
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Intel ^® ICH7 Family Datasheet