Technical information

LS PRO OWNER'S HANDBOOK 7/5
Using PCMCIA Cards
Chapter 7
In general, card resource allocation is handled automatically
by Card & Socket Services. When a card is inserted, Card
Services interrogates the card to discover what resources it
requires, and allocates them if it is able. If necessary, unwanted
motherboard components can be disabled by BIOS Setup to
free resources (see Chapter 3).
A modem card should be configured to use the I/O ports and
IRQ normally assigned to a serial port. Unless your operating
system supports “Plug and Play” PCMCIA, you may need to
disable one of the computer’s serial ports to free the required
resources. See Appendix B, “Technical Information”, for more
about the computer’s use of these resources.
Note
With the advent of operating systems that support Plug and Play
(PnP), there should be fewer conflicts between resources requested
by PCMCIA cards and those used by motherboard components.
If you are using a memory manager you must make sure that
its device statement in CONFIG.SYS excludes those parts of
the upper memory area that will be used by Card & Socket
Services for memory windows. If you are using the Microsoft
EMM386 Memory Manager, the PCM+ Setup Utility will do this
automatically, but you should first remove all /i= and /x=
arguments from the device=emm386 command in CONFIG.SYS.
Note
Memory addresses are always written in base 16 or hexadecimal
notation. Unlike the ten digits of the decimal system (0-9),
hexadecimal uses sixteen digits (0-9 and A-F, where A=10, B=11,
C=12 and so on up to F=15). Hexadecimal numbers are denoted
either by the suffix “h” or by the prefix “0x”. The final digit of a five-
digit memory address is often omitted, so C8000h may be written
as C800h.