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Appendix D Troubleshooting and Common Questions
Serial Hardware and Software for Windows D-16 ni.com
How do I change the resources assigned to the serial interface?
♦ PCI and PXI Boards
The PCI and PXI serial boards are configured as devices belonging to the
multi-function adapters class. The multi-function parent device is listed
under the Multi-function adapters icon, and each child device is listed as
a port under the Ports (COM & LPT) icon.
To change the resources of serial ports, complete the following steps:
1. In the Device Manager tab, under Multi-function adapters,
double-click on a serial interface.
2. Click on the Resources tab to change the resources. Your changes are
automatically reflected to the child devices under Ports (COM &
LPT).
♦ AT and PCMCIA Boards
Because the shared IRQ boards are single physical devices that support
multiple ports, they are registered as “multi-function adapters” in the
Device Manager. Each port is a child device listed under Ports (COM &
LPT).WindowsMe/9x does not allow the resources of the multi-function
child devices to be changed directly.
To change the resources of ports on shared IRQ boards from within the
Device Manager, you must open the Multi-function adapters class and
double-click on the Multi-function Parent item that corresponds to your
National Instruments serial interface. Use the Resources page to change
the resources. Any resource changesare automatically reflected to the child
devices. Figure D-4 shows the Multi-function adapters class in the
Device Manager. (This example shows an AT interface.)