Setup - IBM Personal Computer AT Manual To Operations

Setup
You need to set the date, time, and installed options
when you:
• Install your system unit for the first time.
• Install certain options.
• Replace the battery.
• Have a battery problem.
To set the system options you must know what options
are installed in your system. You listed this information
on the "Setup Information" foldout in the back of the
Installation and Setup manual.
Note: If you do not know what options are installed
in your system, your system unit's cover must be
removed to complete the list. For information on
cover removal, go to Section 2 of the Installation
and Setup manual.
Setup 2-23