Chapter5 ATSerial Hardware Installation, Verification, and Configuration
SerialHardware and Software for Win dows 5-12 ni.com
Verify the Installation
When you begin to verify the installation, keep in mind that the serial
ports built into the computer are typically named from COM1 to COM4.
Windows Me/9xtypically issues port names to the ports on NI serial
hardwarestarting with COM5, COM6 ,and so o n.If not enou gh resources
are available to assign to all the NI serial ports, the port with the higher
COMxname is left unconfigured.
Double-click on the System icon in the Control Panel. In the System
Propertieswindow that appears, select the Device Manager tab, and click
on the View devices by type buttona t the top of the page. If necessary,
double-click on the Ports (COM & LPT) icon to view all of the ports.
Theshared IRQ AT serial boards are configuredas devices belonging to the
“multi-function adapters”class. The multi-function parent device is listed
underthe Multi-function adapters icon, and each child device is listed as
ap ort under the Ports (COM & LPT) icon. If you have installed one of
theseinterfaces, double-click on the Multi-function adapters icon as well
asthe Ports (COM & LPT) icon to look at the ports resources. To modify
the hardwareresources, double-click on the Multi-Function adapters
icon.
Ifa circled exclamation point appears throughthe port icon, the s erial port
is not installed properly.A problem with the port may have occurred
because WindowsMe/9xcould not acquire resources for the port, or
because an interrupt request resource conflict exists.If no circled
exclamationpoint appears, the serial hardware is installed correctly.
Figure 5-6 showsa nexample of NI serial hardware that is installed
properly.