Computing

Computing

1. Hardware

   • Processor
     • FDE
       • Fetch
         • CIR
           • Holds current instruction being executed
         • PC
           • Holds address of next instruction to be executed
         • MAR
           • Holds address of memory location from which data has to be fetched
         • Main storage
         • MBR
           • Temporarily stores data read or written to memory
         • CIR
           • Holds current instruction being executed
       • Decode
         • CIR
           • Holds current instruction being executed
           • Opcode
             • Represents operation
           • Operand
             • Type
             • Hardware needed
       • Execute
         • ALU?
         • Storage of result
           • General purpose register
             • Accumulator
           • Memory
     • Performance
       • Cores
       • Cache size
       • Clock speed
       • Word length
       • Address bus width
       • Data bus width
     • Busses
       • Control
         • Prevents system conflict
           • Bus grant
           • Reset
           • Bus request
           • Memory write
           • Memory read
           • Interrupt request
           • Clock

2. Software

3. Data representation

4. Programming

5. Communication