Notes
Outline
Hard Drives
Floppy Drives
System Board Components Used for Communication Among Devices
Bus
System clock
Expansion slots
PCI:  Used for high-speed input/output devices
AGP:  Used for a video card
ISA:  Used by older and/or slower devices
Bus Lines
System Clock
Expansion Slots
Expansion Slots
Interface (Expansion) Cards
Circuit boards inserted into a slot on the system board to enhance capability of the computer
Common types
Video card
Network card
Internal modem
I/O controller card
Network card
Video Card
The Electrical System
Power supply
Supplies power to the system board and other installed devices
Provides 3.3, 5, and 12 volts DC
The Electrical System
The Electrical System
Instructions and Data Stored on the System Board
ROM chips
Contain permanent programming code
Sometimes called BIOS chips
CMOS configuration chips
Hold configuration or setup information
Jumpers or DIP switches
Hold configuration information
ROM BIOS Chip on a Video Expansion Card
ROM BIOS Chip on the System Board