Epson 486SX - Manual (Page 17)

Chapter 6 describes some of the options you can use in your
computer and contains instructions for setting jumpers and
installing various options.
Chapter 7 explains how to install and remove disk drives.
Appendix A describes how to perform a low-level format on a
hard disk.
Appendix B contains troubleshooting tips.
Appendix C covers the system diagnostic tests you can run to
diagnose hardware problems.
Appendix D contains the specifications for your computer.
At the end of the manual, you’ll find a glossary and an index.
4 Introduction