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Chapter 8 The Processor Part 1
Thursday, 15 December 2016 • 08:29 • 0 comments



INSTRUCTION EXECUTION

PC = Instruction memory, fetch instruction

Register numbers($t0-$t8, $s0-$s8, etc)
·         Register file
·         Read registers

INSTRUCTION CLASS

1.       1. ALU to calculate
·         Arithmetic result
·         Memory address for load/store
·         Branch target address
2.       2.ACCESS DATA MEMORY FOR LOAD/STORE

3.       3.PC = TARGET ADDRESS / PC+4


MULTIPLEXER

  • Multiplexer is a general circuit that produce a single output signal.
  • The output is equal to one of several input signals to the circuit.
  • The multiplexer select which input signal is used as an output signal based on the value represented by a few more input signals, called select signals or select control lines.


CONTROL


COMBINATIONAL ELEMENT

And-Gate



Adder


Multiplexer


Arithmetic / Logic Unit


INSRUCTION FETCH


EXECUTING R-TYPE INSTRUCTION ON MIPS DATAPATH








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