Epson Equity 486DX2/50 PLUS User Manual - Page 186
Appendix C-performing System Diagnostics, Serial Port Rs-232c Port
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Appendix C Performing System Diagnostics This appendix describes how to test the operation of your computer and its peripheral devices using the System diagnostics program on your Reference diskette. Run the diagnostics program if you are not sure whether a device is performing correctly. The table at the end of this appendix lists the error messages you may see during testing. You can test the following devices, each of which is identified by specific reference numbers: 1-System board 2-Memory 3-Keyboard 4-Monochrome display adapter and CRT 5-Color graphics adapter and CRT 6-Diskette drives and controller 7-Math coprocessor 9--Parallel port (printer interface) 11-Serial port (RS-232C port) 12-Alternate serial port 14-Dot-matrix printer 17-Hard disk drives and controller 21-Alternate parallel port 81-Parallel port (on video adapter) Performing System Diagnostics C-1