How to: Determine the COM (Serial) port that a device uses.
Solution:
Open 'Modems' icon from the Windows 95 'Control Panel' to examine the properties of the serial device.
NOTE: COM ports are typically used by modems and mice, and occasionally by serial printers.
1) Click the 'Start' button to display the 'Start' menu and select 'Settings'.
2) Select 'Control Panel'.
'Control Panel' menu item
3) Double-click the 'Modems'. (The 'System Properties' dialog box displays.)
4) Click the 'Diagnostics' tab.
NOTE: All configured COM ports are displayed in the list box on the 'Diagnostics' tab.