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5-16 Chapter 5: Setup
Memory Map (7401-22xx/35xx/45xx BIOS Version 2.2.1.x)
The following table details the memory map for 7401-22xx/35xx/45xx
terminals BIOS Version 2.2.1.x (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 kB System BIOS
EE000-EFFFF 8 kB Main BIOS (available as UMB)
ED000-EDFFF 4 kB ESCD (plug and play configuration
area)
EC000-ECFFF 4 kB OEM (available as UMB)
E0000-EBFFF 48 kB
BIOS Reserved (currently available
as UMB)
D0000-DFFFF 64 kB Available HI DOS memory
CE000-CFFFF 8 kB Flash Disk (optional)
CC000-CDFFF 8 kB NCR Trigantor MSR (optional)
C0000-CBFFF 48 kB Onboard video BIOS
A0000-BFFFF 128 kB Reserved for video memory
9FC00-9FFFF 1 kB Extended BIOS Data (moveable by
QEMM, 386MAX)
80000-9FBFF 127 kB Extended conventional
00000-7FFFF 512 kB Conventional