National Instruments 3.22E+04 用户手册

1.

Select Start»Settings»Control Panel and double-click on the 
System icon.

2.

Click on the Device Manager tab and click on the View devices by 
type button.

3.

Double-click on the Ports (COM & LPT) icon to display a list of 
installed ports.

The Read Me file gives the version of the software. To open the file, select 
Start»Programs»National Instruments Serial»Read Me.

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:

1.

In the Device Manager tab, under Ports (COM & LPT), double-click 
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.

To name serial ports COM1, COM2, COM3, or COM4, change the base 
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 C-1. You do not 
need to change the IRQ setting for Windows Me/9x to change the name.