National Instruments PCI 用户手册
Appendix D
Troubleshooting and Common Questions
© National Instruments Corporation
D-15
How can I determine which version of the NI-Serial software I have
installed?
installed?
The Read Me file gives the version of the software. To open the file, select
Start»Programs»National Instruments Serial»Read Me.
Start»Programs»National Instruments Serial»Read Me.
What do I do if the diagnostic test fails with an error?
Refer to the
section earlier in this
appendix.
How can I determine which port is associated with COMx?
To determine which physical port is associated with COMx, complete the
following steps:
following steps:
1.
In the Device Manager tab, under Ports (COM & LPT), double-click
on a serial port.
on a serial port.
2.
Click on the Port Settings tab to display the serial number of the serial
hardware and the physical port number starting at 1. For all serial
hardware, PORT1 refers to the top port, PORT2 refers to the next port
down, and so on.
hardware and the physical port number starting at 1. For all serial
hardware, PORT1 refers to the top port, PORT2 refers to the next port
down, and so on.
How can I change the COM numbers of my National Instruments
serial ports?
serial ports?
To name serial ports COM1, COM2, COM3, or COM4, change the base
address of the port. To do so, refer to the
address of the port. To do so, refer to the
section earlier in this appendix.
When you change the base address, Windows Me/9x automatically
converts it to the corresponding COM name listed in Table D-1. You do not
need to change the IRQ setting for Windows Me/9x to change the name.
converts it to the corresponding COM name listed in Table D-1. You do not
need to change the IRQ setting for Windows Me/9x to change the name.
Table D-1. Standard DOS-Based Addresses
COM Port
Base Address
COM1
3f8
COM2
2f8
COM3
3e8
COM4
2e8