Instruction manual

APPENDIX D. CARD SERVICES DRIVER SOFTWARE NOTES
PC208W, Version 3.0, Instruction Manual D-3
D.3.1 HOW TO CHOOSE WHICH AREA OF
MEMORY TO ALLOCATE TO CARD
SERVICES
The address range used by Card Services can
be from A0000 to FFFFF. However not all
machines will allow Card Services to use these
addresses. Many machines cannot use
addresses below
C8000
or above
E8000
for
Card Services. If you are just extending the
region of memory allocated to Card Services, it
may be best to leave the start of the region
where it is, as you know your machine is
capable of using memory from that address.
Excluding a region of memory for use by other
programs does not mean that Card Services will
be aware of it and be able to use it. The various
implementations of Card Services come with
their own .INI files, that specify the regions of
memory Card Services will use.
Many implementations of Card Services also
have setup programs which automatically detect
the free memory and create the .INI file
accordingly. Often such programs allow you to
specify and modify the memory range to be
used by card services, to prevent Card Services
from using a region which was excluded for use
by some other device such as a graphics card
or network card.
A problem which sometimes occurs when
configuring memory ranges is that the setup
program forgets which EMM386 exclude ranges
were set for Card Services, and so each time
the setup program is run, greater regions are
excluded from EMM386. Because of this, it is
advisable to keep a backup copy of your
CONFIG.SYS file until after you have finished
making changes.
If your system is already set up in accordance
with the above (and as described in the Card
Services supplier’s instructions) and SMS still
fails due to lack of resources, you may need to
increase the size of your memory range. A
range of 64K (example: D0000-DFFFF) should
be plenty. Unless you have many other
specialized PCMCIA drivers you will not need to
increase the size of this range.
Please refer to the instructions which came with
your Card Services driver software and your
Microsoft Windows manual for help in
optimizing and setting up your particular system.