IBM ThinkPad 755CX Manual page 249

Example of the Memory Area for the Card Services and 3270
Notes:
1. The Auto Configurator for OS/2
supports modem and data/fax
modem PC Cards.
2. The Auto Configurator for DOS
and Windows supports modem,
data/fax modem, and 3270
emulation PC Cards.
The following is an example of the memory area specified by the
Card Services memory area and 3270 data file:
A Resource Map Utility statement:
\
Lines from the 3270 data file:
[ ]
The keyword "Memory1" is specified by the base address of the
memory window given as a hexadecimal segment address.
Memory window 1 must be within the range of the memory area
reserved for Card Services. The Card Services memory area is
specified using the Resource Map Utility.
In the preceding example, the memory area for Card Services is
from X D000 to X D7FF and the 3270 memory area is specified
by "Memory1" of the data file. The memory area (X CE00 ) for
"Memory1" in the first "Port1" line is not within the area ("MA="
parameter) specified for the Card Services memory. As a result, the
Auto Configurator cannot assign the 3270. It attempts to assign the
3270 from details of the second "Port1" line.
Carefully check each application program you use so that the
memory area is specified by the "MA=" parameter.
Appendix B. Advanced Information for PC Cards
Advanced Information for PC Cards
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