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Chapter 4 PCMCIA Serial Hardware Installation, Verification, and Configuration
© National Instruments Corporation 4-23 Serial Hardware and Software for Windows
PCMCIA-232/2, PCMCIA-485/2
These cards require two base I/O settings, one for each port, and they share
an IRQ.
Figure 4-13 shows the resource configuration dialog box for a
PCMCIA-485/2. The PCMCIA-232/2 dialog box is similar.
Figure 4-13. Resource Configuration Dialog Box for the PCMCIA-485/2
Base I/O Address: The base I/O addresses assigned to the two
ports.
IRQ: The IRQ shared by the two ports.
Length: The size of each I/O window (in bytes).
Note
When you select resources for the PCMCIA cards, use the Microsoft Windows NT
diagnostics utility to make sure that the resources have not been assigned to any other
device. This utility displays a list of I/O port addresses and IRQ levels that are currently
being used in your system.