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System Unit - Coggle Diagram
System Unit
contains
Component
such as
CPU
contains
Arithmetic and Logic Unit (ALU)
Control Unit (CU)
Register
General Purpose Register (GPR)
e.g.
Base register (BX)
Counter (CX)
Data register (DX)
Accumulator (AX)
Control register
e.g.
Instruction Register (IR)
Program Counter (PC)
Memory Address Register (MAR)
Memory Data Register (MDR)
Status Register (SR)
speed affected by
clock rate
word length
executes
Machine cycle
e.g.
Fetch
Decode
Execute
Interrupt
e.g.
Motherboard
System bus
e.g.
Control bus
Address bus
Data bus
Memory
Power supply
Display card
Hard disk
Optical disk drive
connected to
Peripheral
classified as
Output peripheral
e.g.
Speaker
Printer
Storage peripheral
e.g.
USB flash drive
Communication peripheral
e.g.
Broadband modem
Input peripheral
e.g.
Keyboard
Mouse
Microphone