Chapter 3: Setup 3-19
Memory Map (Pentium III/Celeron)
The following table details the memory map for the Pentium III/Celeron
processors. The ESCD area from ED000-EDFFF is not available for use as
an Upper Memory Block (UMB) by memory managers. The area from
E0000-EBFFF is currently not used by the BIOS and is available for use as
UMB by memory managers. Parts of this area may be used by future
versions of the BIOS to add increased functionality.
Address Range (hex) Size Description
FECFF000-FECFF01B 27 LAN PXE ROM
100000-10000000 255 MB Extended memory
F0000-FFFFF 64 K System BIOS
EE000-EFFFF 8 K Main BIOS (available as UMB)
ED000-EDFFF 4 K ESCD (plug and play configuration
area)
EC000-ECFFF 4 K OEM (available as UMB)
E0000-EBFFF 48 K BIOS Reserved (currently available
as UMB)
D0000-DFFFF 64 K Available HI DOS memory
CE000-CFFFF 8 K Flash Disk (optional)
CC000-CDFFF 8 K NCR Trigantor MSR (optional)
C0000-CAFFF 42 K Onboard video BIOS
A0000-BFFFF 128 K Reserved for video memory
9FC00-9FFFF 1 K Extended BIOS Data (moveable by
QEMM, 386MAX)
80000-9FBFF 127 K Extended conventional
00000-7FFFF 512 K Conventional
