ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
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3-32 Chapter 3: Setup<br />
Memory Map<br />
The following table details the memory map for the Pentium III/Celeron<br />
processors. The ESCD area from ED000-EDFFF is not available for use as<br />
an Upper Memory Block (UMB) by memory managers. The area from<br />
E0000-EBFFF is currently not used by the BIOS and is available for use as<br />
UMB by memory managers. Parts of this area may be used by future<br />
versions of the BIOS to add i<strong>ncr</strong>eased functionality.<br />
Address Range (hex) Size Description<br />
FECFF000-FECFF01B 27 LAN PXE ROM<br />
100000-10000000 255 MB Extended memory<br />
F0000-FFFFF 64 K System BIOS<br />
EE000-EFFFF 8 K Main BIOS (available as UMB)<br />
ED000-EDFFF 4 K ESCD (plug and play configuration<br />
area)<br />
EC000-ECFFF 4 K OEM (available as UMB)<br />
E0000-EBFFF 48 K BIOS <strong>Re</strong>served (currently available<br />
as UMB)<br />
D0000-DFFFF 64 K Available HI DOS memory<br />
CE000-CFFFF 8 K Flash Disk (optional)<br />
CC000-CDFFF 8 K NCR Trigantor MSR (optional)<br />
C8000-CBFFF 16 K Available HI DOS memory<br />
C0000-C9FFF 40 K On-board video BIOS<br />
A0000-BFFFF 128 K <strong>Re</strong>served for video memory<br />
9FC00-9FFFF 1 K Extended BIOS <strong>Data</strong> (moveable by<br />
QEMM, 386MAX)<br />
80000-9FBFF 127 K Extended conventional<br />
00000-7FFFF 512 K Conventional
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