Chapter 3

Components in the System Unit

The System Unit

• Motherboard
• Chips
• CPU
• Control Unit
• Machine Cycle
• Fetch
• Decode
• Execute
• Store
• Arithmetic/Logic Unit (ALU)
• Pipelining
• Registers
• System Clock
• Processor Installation/Upgrades
• ZIF socket
• Heat Sinks & Heat Pipes
• Coprocessors
• Parallel Processing

Data Representation

• Analog
• Digital

Memory

• Volatile/Non-Volatile
• RAM
• SIMM
• DIMM
• Cache
• Level 1
• Level 2
• ROM
• Firmware
• PROM
• Microcode
• Flash Memory
• CMOS
• Memory Access Time
• Nanosecond

Expansion Slots & Expansion Cards

• Video
• Sound
• Modem
• Plug & Play
• PC Cards
• PCMCIA
• Type 1 – memory
• Type II – modem/communications
• Type III – hard disk

Ports

• Serial Ports
• Parallel Ports
• USB Ports
• MIDI Ports
• SCSI Ports
• 1394 Ports
• IrDA Ports

Buses

• System Bus
• Expansion Bus
• ISA bus
• VESA local bus
• Accelerated Graphics Port
• Universal Serial Bus
• PC Card Bus

Bays

• Drive Bays
• External
• Internal

Power Supply

• AC Adapter

Laptop Computers

• Port Replicators