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F0000h – FFFFFh
24.3.1
U sing Expanded Memory Managers
1 4 9 B
coolMONSTER/PM extension BIOSes may be mapped to an upper memory area. (See the previous table).
Some add-on boards also have optional ROMs or use drivers that communicate with their corresponding
devices via memory mapped I/O such as dual-ported RAM. These boards have to share the upper memory
area with the Expanded Memory Manager's EMS frame. This often causes several problems in the system.
Most EMMs scan the upper memory area for extension BIOSes (optional ROMs) and choose a free memory
area for their frame if it is not explicitly set. Normally, they are not always capable of detecting special
memory-mapped I/O areas. You need to tell the EMM which memory areas are not available for the EMS
frames, which is most of the time done by using special exclusion parameters.
If the Expanded Memory Manager you use cannot detect extension BIOSes (optional ROMs), make sure
you excluded all areas in the upper memory, which are used by extension BIOSes, too. Your instruction
in the CONFIG.SYS concerning the Expanded Memory Manager should look like this: (question marks
symbolize the location of extension BIOS).
MS-DOS Example
DEVICE=EMM386.EXE X=????-???? X=E000-FFFF
Note:
When booting up your system using this configuration under MS-DOS, the exclusion of area F000 to FFFF
causes a warning. Microsoft reports that this message will always appear when the F000 segment lies in the
shadow RAM. This is a bug of EMM386, not of the coolMONSTER/PM.
Please read the technical manuals of add-on cards used with the coolMONSTER/PM for the memory areas
they use. If necessary, exclude their memory locations to avoid a conflict with EMM386.
Kontron User's Guide
coolMonster/PM
System BIOS,
No
USB legacy support
24 23BAppendix A: System Resource Allocation
configurations.
If JRC software is used, 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.).
56
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