IBM PS/2 90 XP 486 Hardware Maintenance Reference page 15

2.3.2 CMOS RAM and CMOS RAM Extension
CMOS RAM provides 64 bytes of storage.
system configuration and security information.
the remaining 14 bytes to track the date, time, and battery level.
CMOS RAM extension stores additional configuration and system-status
information.
The data stored in the CMOS RAM and CMOS-RAM extension is kept active by
the battery when the system is powered-off.
due to a depleted or removed battery, you can restore the data by using
one of the following methods:
If the user has a customized configuration that uses settings other
than the default, run Restore configuration from the system programs
stored on the default hard disk drive.
If default configuration settings are used, run Automatic
configuration from the system programs stored on the hard disk drive.
IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR
CMOS RAM and CMOS RAM Extension
Fifty bytes are used to store
The real-time clock uses
If the stored data is lost
¦ Copyright IBM Corp. 1990, 1992
2.3.2 - 1
An 8KB