1.2.2 CMOS RAM and CMOS RAM Extension
The CMOS RAM provides 64 bytes of storage. The real-time clock uses the
first 14 bytes of this storage to track the date, time, and battery level.
The remaining 50 bytes are assigned to store system configuration and
security information. The 8KB CMOS RAM extension stores additional
configuration and system status information.
The data stored in CMOS RAM and CMOS RAM extension is kept active by the
backup battery when the system is powered-off. If stored data is lost due
to a depleted or removed battery, the data can be restored using one of
the following methods:
¯ If the user has a customized configuration that uses settings other
than the default, run the
Restore configuration
from the system
utility programs stored on the hard disk.
¯ If the configuration settings use the default, run the
Automatic
configuration
from the system utility programs stored on the hard
disk.
IBM PS/2 Model CL57 SX HMR
CMOS RAM and CMOS RAM Extension
_ Copyright IBM Corp. 1991
1.2.2 - 1
