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 4Gbytes. 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
FWH1 0/1 0xE_0000 128 KB
(PCI option ROMs, top-down
allocations)
0xA_0000
Main memory 0x0_0000 Up to 4 GB