Intel
82801BA ICH2 Datasheet
9-19
LPC Interface Bridge Registers (D31:F0)
9.1.31
FWH_SEL1—FWH Select 1 Register (LPC I/F—D31:F0)
Offset Address:
Default Value:
E8h
00112233h
Attribute:
Size:
R/W
32 bits
Bit
Description
31:28
FWH Address Range Select (FWH_F8_IDSEL)
—RO. IDSEL for two 512 KB FWH memory ranges
and one 128KB memory range. This field is fixed at 0000. The IDSEL in this field addresses the
following memory ranges:
FFF8 0000h–FFFF FFFFh
FFB8 0000h–FFBF FFFFh
000E 0000h–000F FFFFh
27:24
FWH Address Range Select (FWH_F0_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFF0 0000h–FFF7 FFFFh
FFB0 0000h–FFB7 FFFFh
23:20
FWH Address Range Select (FWH_E8_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFE8 0000h–FFEF FFFFh
FFA8 0000h–FFAF FFFFh
19:16
FWH Address Range Select (FWH_E0_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFE0 0000h–FFE7 FFFFh
FFA0 0000h–FFA7 FFFFh
15:12
FWH Address Range Select (FWH_D8_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFD8 0000h–FFDF FFFFh
FF98 0000h–FF9F FFFFh
11:8
FWH Address Range Select (FWH_D0_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFD0 0000h–FFD7 FFFFh
FF90 0000h–FF97 FFFFh
7:4
FWH Address Range Select (FWH_C8_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFC8 0000h–FFCF FFFFh
FF88 0000h–FF8F FFFFh
3:0
FWH Address Range Select (FWH_C0_IDSEL)
—R/W. IDSEL for two 512 KB FWH memory
ranges. The IDSEL programmed in this field addresses the following memory ranges:
FFC0 0000h–FFC7 FFFFh
FF80 0000h–FF87 FFFFh
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