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FM 456-2 Functions and Technical Data
Memory Areas for AT Cards
AT cards which are inserted in the expansion module ATM 478 can occupy the
following memory areas:
Area
D 0000H to E 7FFFH
C 8000H to C BFFFH
C C000H to C EFFFH
C F000H to C FFFFH
1)
The area is only available if no memory card is present.
2)
If the driver software under MS-DOS requires expanded memory (EMS), the
memory manager EMM386 occupies 64 K in the area D0000H to E7FFFH
because it must be operated in EMS mode.
I/O Address Area
Addressing of the ISA-compatible input/output components is carried out in the I/O
area at addresses from 0100
architecture are used. Unlike the original AT, the I/O addresses are fully decoded in
the FM 456-2 module, so that addresses above 03FF
M7-400-specific hardware.
Address Area for AT Modules
The following address area is available for addressing AT modules in the ATM 478
AT adapter module:
0200
to 03FF
H
except the area from 03E0
except the area occupied by the installed interface submodules (see the
chapter "Interface Submodules" in reference manual /1/ ).
4-14
M7 RMOS32
96 K
16 K
1)
12 K
4 K
to 03FF
. The addresses determined by the ISA
H
H
H
to 03E3
and
H
H
FM 456-2 Application Function Module Installation, Hardware, and Startup
M7 RMOS32 with MS-DOS
Without EMS
With EMS
2)
96 K
32 K
16 K
16 K
12 K
12 K
4 K
4 K
can be used for addressing
H
C79000-G7076-C458-01
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