KONTRON
CMP/P3 and CMP/C3 User’s Guide
49
Appendix A: System-Resource Allocation
25.3
Memory Map
The coolMONSTER/P3 and coolMONSTER/C3 processor modules can support up to 256MB/512MB of
memory depending on the chipset. 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 is enabled, a 16K
block is shadowed for BIOS extension, starting
with first free area at D0000h, D4000h,
D8000hor DC000h. (BIOS extensions do not
use the whole shadow block.)
E0000h – EFFFFh
System BIOS
No
EFFFFh – F0000h
System BIOS
No
