Controlling the datapath

Reset

InitializeMachine

Register-to-Register

BranchNot Taken

Branch Taken

Init

FetchInstr.

XEQInstr.

Load/Store

Branch

Incr.PC

• Top level state diagram

  • Reset
  • Fetch instruction
  • Decode
  • Execute

• 3 classes of instructions

  • Branch
  • Load/store
  • Register-to-register

• Different sequence of states for each instruction type

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