National Instruments AT User Manual download pdf (Page 91)

Chapter 4 PCMCIA Serial Hardware Installation, Verification, and Configuration

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.

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National Instruments AT User Manual Page 91