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This is a set of flashcards that explain what each component in the processor does
Arithmetic and Logic Unit (ALU)
Performs all logical and numerical calculations
Clock
Provides the timing signal used to synchronise processor and all other components and the movement of data across other components
General purpose registers
A series of small memory locations on the processor available for different uses
Memory address register (MAR)
Holds the address to be put on the address bus
Control unit
It runs the fetch execute cycle
Synchronises and controls all other components
Contains instruction decoder which decodes instructions
Memory data register (MDR) or Memory buffer register (MBR)
Holds the data that was taken from the data bus OR it holds the data to be put on the data bus
Program Counter (PC)
Holds the address of the next instruction
Current instruction register (CIR)
Holds the current instruction
Interrupt register
Holds interrupt
Status register
Holds the status flag relating to the current operations
