KONTRON
coolMONSTER/S User’s Guide
47
Appendix A: System-Resource Allocation
24.3
Memory Map
The
cool
MONSTER/S
processor modules can support up to 256MB of memory. The first 640KB of
DRAM are used as main memory.
Using DOS, you can address 1MB of memory directly. Memory area above 1MB (high memory,
extended memory) is accessed under DOS via special drivers such as HIMEM.SYS and EMM386.EXE,
which are part of the operating system. Please refer to the operating system documentation or
special textbooks for information about HIMEM.SYS and EMM386.EXE.
Other operating systems (Linux or Windows versions) allow you to address the full memory area
directly.
Upper Memory
Use
Available
Comment
A0000h – BFFFFh
VGA Memory
No
Mainly used by graphic adapter cards. If a PCI
graphic card is in the system this memory area
is mapped to the PCI bus.
C0000h – CBFFFh
VGA BIOS
No
CC000h – DFFFFh
Yes
Free for ISA bus or shadow RAM in standard
configurations.
If onboard LAN RPL ROM or USB Legacy
Support is enabled, a 16K block is shadowed
for BIOS extension, starting with first free area
at CC000h ,D0000h, D4000h, D8000h or
DC000h. (BIOS extensions do not use the
whole shadow block.)
E0000h – EFFFFh
System BIOS
No
EFFFFh – F0000h
System BIOS
No
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