PCI Quad 422/485 Card
Chapter 5 Windows 3.x Software Configuration.
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21
Deleting Ports in Windows.
The Delete button can be used to discard the entries of ports that have been
removed from the system.
Note. Never try to leave out a serial port number when using the delete button,
because Windows may automatically shift serial port numbers which results in a
mis-match of settings in the Serial Ports Applet (COM1-COM4 only).
