A+ Class 2/02/10 KEYBOARD AND MORE

Pages covered in todays class is 26 -32.

Subject:

• keyboard connectors
• peripheral ports and connectors
• motherboards
• BIOS and POST
• CMOS and CMOS Battery

Keyboard

• 5 pins DIN
• AT Connector
• PS/2 (6 pins)
• color code is purple

*********************NOTE************************

The most popular connector today for a keyboard is the PS/2, but it is quickly being replace by USB connections.

7 most common type of port on a computer are

• Serial
• Parallel
• USB (Universal Serial Bus)
• Video (channel 3)
• Ethernet
• Sound In/Out
• Game port

1. DA-15F
2. 15 pin female D-subminiature (D-sub)

Motherboard

• header
• peripheral port (direct-solder method)

BIOS and POST

• BIOS: Basic Input/Output System (ROM BIOS Chip)
• contain system software that boots the system and allows the OS to interact with certain hardware in the computer in lieu of requiring a device driver to do so.
• POST: Power -On Self Test ( a series of system check performed by system BIOS and other components, such as the SCSI BIOS and the Video BIOS.

CMOS and CMOS Battery

• date
• time hard drive configuration
• memory
• integrated ports
• boot sequences
• power management