1.1.1 Structure and Function of the Processor

1.1.1 Structure and Function of the Processor

1. Registers

   • ACC
     • Stores the results of the ALU.
   • ALU
     • Carries out logical decisions and calculations.
   • PC
     • Keeps track of the current line of code, holds the address of the next instruction..
   • MAR
   • MDR
   • CIR
     • Holds the instruction to be executed.
   • CU
     • Decodes the instruction, sends control signals around the cpu via control bus.
   • Buses
     • Control
     • Data
     • Address

2. FDE Cycle

   • Fetch
   • Decode
   • Execute
   • Store

3. CPU Performance

   • Clock Speed
     • How many FDE Cycles per second
     • Measured in Hertz (Hz)
     • 4GHz = 4 Billion Cycles per Second
   • Cores
     • Multi-tasking
   • Cache
     • Level 1
     • Level 2
     • Level 3 - Shared across cores.

4. Pipelining

   • Efficiency

5. Architectures

   • Von Neumann
   • Harvard
   • Contemporary