ADLINK cPCI-3538 - Manual (Page 23)

Installation
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1. You can install up to two cPCI-3534/3538 cards in one 95/98 system.
2. When you need to install two same type cards in one 95/98 system,
you must confirm to let one card’s switch is ON, and the other card’s
switch is OFF.
3. The card with switch ON will have COM port number assigned for first
card. The card with switch OFF will have COM port number assigned
for second card.
4. If you install two the same type serial communication cards with
switch ON or OFF simultaneously, we can not confirm that both cards
will active properly.
5. If you install multiple cards in one 95/98 system simultaneously,
please confirm that the COM port number assigned does not overlap
for different card. Or you may have improperly operation in your
system.
6. For easy to maintain 95/98 system’s COM port number, we suggest
that you must set the switch ON for the first card to be installed in
95/98 system.
7. The serial communication card can be used in interrupt shared mode.
PCI BIOS will assign IRQ for each serial communication card. For
multi-card application, we can just share one IRQ in each card, but
you must confirm that one system may have minimum one IRQ left for
P&P function. If there are no IRQ left to be assigned to serial
communication card, you might have wrong operation.