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How does an instruction reach the decoder?
Press Next tick to follow an instruction from RAM to the decoder.
FetchDecodeExecute
Tick 0PCProgram counter
MARMemory address
CIR · Current instruction
MDR · Memory data
ACCAccumulator
CU · Control unit DECODER
ALUArithmetic + logic
AddrWord
Shared memory
Address Data Control
PC holds the next instruction location.
Ready to run.
Teaching steps show individual transfers; pacing is not a hardware clock speed.