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15 cards from this deck
Process CPU uses to execute instructions; repeats for each instruction
Three
Fetch, Decode, Execute
Retrieves next instruction from memory
Holds address of next instruction in memory
Temporarily holds address of instruction
Receives instruction from memory, passes to CIR
Stores fetched instruction for decoding
CPU interprets instruction to determine actions required
Reads & decodes instruction in CIR into signals
Performs actions specified by decoded instruction
Performs arithmetic/logical operations on data in registers
Transmits memory addresses from MAR to main memory
Transfers data between memory & CPU, particularly to/from MDR
Address of next instruction, not data addresses
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