Chapter4 PCMCIASerial Hardware Installation, Verification, and Configuration
©NationalInstruments Corporation 4-23 SerialHardware and Software for Windows
PCMCIA-232/2, PCMCIA-485/2
Thesecards 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.
Figure4-13. ResourceConfiguration Dialog Box for the PCMCIA-485/2
Base I/OAddress: The baseI /O addressesassigned t o the two
ports.
IRQ: The IRQshared by the two ports.
Length: The sizeof each I/O window (in bytes).
Note Whenyou select resources forthe PCMCIA cards, use the Microsoft WindowsNT
diagnostics utility to make sure that the resources havenot been assigned to any other
device.This utility displays a list of I/O port a ddresses and IRQ levelsthat are currently
being used in your system.