FM 456-2 Functions and Technical Data
4-14
FM 456-2 Application Function Module Installation, Hardware, and Startup
C79000-G7076-C458-01
Memory Areas for AT Cards
AT cards which are inserted in the expansion module ATM 478 can occupy the
following memory areas:
Area
M7 RMOS32
M7 RMOS32 with MS-DOS
Without EMS
With EMS
D 0000H to E 7FFFH
96 K
96 K
32 K
2)
C 8000H to C BFFFH
16 K
16 K
16 K
C C000H to C EFFFH
1)
12 K
12 K
12 K
C F000H to C FFFFH
4 K
4 K
4 K
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
H
to 03FF
H
. The addresses determined by the ISA
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
H
can be used for addressing
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
H
to 03FF
H
except the area from 03E0
H
to 03E3
H
and
except the area occupied by the installed interface submodules (see the
chapter “Interface Submodules” in
reference manual /1/).