Datasheet

Intel
®
E8870 Scalable Node Controller (SNC) Datasheet 4-5
System Address Map
North BIOS: Elements of system BIOS that reside in the FWH device(s) connected to the SNC.
South BIOS: Elements of system BIOS that reside in the FWH devices connected to the ICH4.
Figure 4-2. Firmware Map Example using Intel
®
E8870 Chipset and Intel 82802 FWH with
Local Firmware Enabled
001145a
FWH A22
FSBC.
FEATEN
0
1
0
Processor System
Bus Address
North BIOS or
North Register
Space
(Depends on
FEATEN Field in
FSBC Register)
Unused Register
Space
(BIOS Cannot be
Accessed for
These Devices)
South BIOS
South Register
Space
Register for IDSELs
ICH4.FWHBIOS: F8
ICH4.FWHBIOS: F0
ICH4.FWHBIOS: E8
ICH4.FWHBIOS: E0
ICH4.FWHBIOS: D8
ICH4.FWHBIOS: D0
ICH4.FWHBIOS: C8
ICH4.FWHBIOS: C0
SNC.FWHSEL: F8 Range
SNC.FWHSEL: F0 Range
SNC.FWHSEL: E8 Range
SNC.FWHSEL: E0 Range
SNC.FWHSEL: D8 Range
SNC.FWHSEL: D0 Range
SNC.FWHSEL: C8 Range
SNC.FWHSEL: C0 Range
ICH4.FWHBIOS2: 40
ICH4.FWHBIOS2: 60
ICH4.FWHBIOS2: 50
ICH4.FWHBIOS2: 70
ICH4.FWHBIOS2: 40
ICH4.FWHBIOS2: 60
ICH4.FWHBIOS2: 50
ICH4.FWHBIOS2: 70
Four 1 MB 82802
Device Maximum
Four 1 MB 82802
Device Maximum
Local Firmware
Range
(4 MB)
Global Firmware
Range
(12 MB)
FFC0_0000h - FFC7_FFFFh
FFC8_0000h - FFCF_FFFFh
FFD0_0000h - FFD7_FFFFh
FFD8_0000h - FFDF_FFFFh
FFE0_0000h - FFE7_FFFFh
FFE8_0000h - FFEF_FFFFh
FFF0_0000h - FFF7_FFFFh
FFF8_0000h - FFFF_FFFFh
FF80_0000h - FF87_FFFFh
FF88_0000h - FF8F_FFFFh
FF90_0000h - FF97_FFFFh
FF98_0000h - FF9F_FFFFh
FFA0_0000h - FFA7_FFFFh
FFA8_0000h - FFAF_FFFFh
FFB0_0000h - FFB7_FFFFh
FFB8_0000h - FFBF_FFFFh
FF40_0000h - FF47_FFFFh
FF48_0000h - FF4F_FFFFh
FF50_0000h - FF57_FFFFh
FF58_0000h - FF5F_FFFFh
FF60_0000h - FF67_FFFFh
FF68_0000h - FF6F_FFFFh
FF70_0000h - FF77_FFFFh
FF78_0000h - FF7F_FFFFh
FF00_0000h - FF07_FFFFh
FF08_0000h - FF0F_FFFFh
FF10_0000h - FF17_FFFFh
FF18_0000h - FF1F_FFFFh
FF20_0000h - FF27_FFFFh
FF28_0000h - FF2F_FFFFh
FF30_0000h - FF37_FFFFh
FF38_0000h - FF3F_FFFFh