APPENDIX A
PC COM DIAGNOSTIC UNDER MS/DOS


The PCCOMQC program provides a diagnostic routine to test your PCCOM ISA bus 2 port serial adapter under MS/DOS. It provides internal and external loopback tests. A loopback plug must be connected to each port being tested, and you can select different signal's connection to test communication signals from hardware configuration function.

To test your PCCOM 2 port adapter under MS/DOS, please type

A>PCCOMQC
(A> means system prompt)
* Then select "PCCOM/ ISA 2 port RS232" item.

The hardware configuration is shown in the following.