Epson 20 - Manual (Page 145)

Appendix C
Performing System Diagnostics
This appendix describes how to check the operation of the main unit
and peripheral devices of your Equity 386. You check these devices
using the 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
2 - Memory
3 - Keyboard
4 - Monochrome display adapter and CRT
5 - Color graphics adapter and CRT
6 - Floppy disk 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)
Starting System Diagnostics
To run the system diagnostics, you must boot your computer with the
Reference diskette in drive A. If you start this program in any other
way, some tests may produce strange results.
To start the system diagnostics program, follow these steps:
1. Insert the Reference diskette in drive A.
Performing System Diagnostics C-l