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Appendix C Troubleshooting and Common Questions
PCMCIA Serial for Windows Me/9x C-6 ni.com
In most cases, Windows Me/9x does not assign names COM1 through
COM4 to the serial hardware. Rather, it names the ports starting with
COM5. If you assign any of the base addresses in Table D-1 to a National
Instruments serial port, Windows Me/9x automatically changes the COM
port name to the corresponding one listed in this table. You do not need to
change the IRQ setting for this name change to occur. To change the base
address, refer to the Selecting Conflict-Free Resources section earlier in
this appendix.
How do I change the resources assigned to PCMCIA two-port or
four-port serial cards?
Because the two-port PCMCIA cards 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). Windows Me/9x does not allow the resources of the
multi-function child devices to be changed directly.
To change the resources of ports on two-port PCMCIA cards 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 changes are automatically reflected to the child
devices. Figure C-2 shows the Multi-function adapters class in the Device
Manager.