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 for RS422 mode.
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 adapterunder MS/DOS, please type
To test your PCCOM 2 port adapterunder MS/DOS, please type
A>PCCOMQC
(A>means system prompt)
* Then select "PCCOM/ISA 2 port Rs422" item.
(A>means system prompt)
* Then select "PCCOM/ISA 2 port Rs422" item.
The hardware configuration is shown in the following.
