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Intel NetStructure
®
MPCBL0001 High Performance Single Board Computer 87
Technical Product Specification
Addressing
5.3 Memory Map
NOTE: The OS may need to be recompiled to support memory above 4 Gbytes.
The Firmware Hub(s) also appears at the aliased address of (4 Gbyte – 4 Mbyte).
The MCH provides the capability to reclaim the physical memory overlapped by memory-mapped
I/O devices, BIOS, and I/O APICs that reside just below 4 Gbytes. This memory may be remapped
to physical memory at the address defined by the TOLM register.
Table 51. Memory Map
Memory Device Address Size
Top of addressable memory 0xFFFF_FFFF --
Firmware Hub Devices (x2) 0xFFE0_0000 Up to 16 Mbit
-- Firmware Hub Device 0 0xFFF0_0000 8 Mbit/1 MB
-- Firmware Hub Device 1 0xFFE0_0000 8 Mbit/1 MB
. . .
HI-B P64H2 IOAPIC B 0xFEC0_4000 256 bytes
HI-B P64H2 IOAPIC A 0xFEC0_3000 256 bytes
HI-C P64H2 IOAPIC B 0xFEC0_2000 256 bytes
HI-C P64H2 IOAPIC A 0xFEC0_1000 256 bytes
ICH3 IOAPIC 0xFEC0_0000 256 bytes
Top of main memory … <system dependent>
Top of Low Memory <system dependent>
TEM-TSEG
0100_0000 16 MB
00F0_0000 15 MB
0010_0000 1 MB
FWH
1
0/1 0xE_0000 128 KB
(PCI option ROMs, top-down
allocations)
0xA_0000
Main memory 0x0_0000 Up to 4 GB