Real-Time Clock, Cmos Sram, And Battery; Legacy I/O Controller; Diskette Drive Controller; Keyboard And Mouse Interface - Intel BLKD945GCPE - LGA775 1066FSB 2DDR2 2GB Audio Video Lan mATX 10Pack Motherboard Technical Product Specification

For information about
The location of the Serial ATA IDE connectors
1.5.4

Real-Time Clock, CMOS SRAM, and Battery

A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied.
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded
into CMOS RAM at power-on.
1.6

Legacy I/O Controller

The legacy I/O controller provides the following features:
• Serial IRQ interface compatible with serialized IRQ support for PCI Conventional
bus systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.44 MB diskette drive
• Intelligent power management, including a programmable wake-up event interface
• PCI Conventional bus power management support
The BIOS Setup program provides configuration options for the legacy I/O controller.
1.6.1

Diskette Drive Controller

The legacy I/O controller supports one diskette drive. Use the BIOS Setup program to
configure the diskette drive interface.
For information about
The location of the diskette drive connector
1.6.2

Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel.
NOTE
The keyboard is supported in the bottom PS/2 connector and the mouse is supported
in the top PS/2 connector. Power to the computer should be turned off before a
keyboard or mouse is connected or disconnected.
For information about
The location of the keyboard and mouse connectors
Product Description
Refer to
Figure 9, page 38
Refer to
Figure 9, page 38
Refer to
Figure 8, page 37
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