Computer Organization Ch2 Terms

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Computer Organization Ch2 Terms
2012-05-09 15:41:19
Computer Org Chapter Structured Organization

Terminology of Ch2 Computer Org
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  1. CPU (Central Processing Unit)
    brain of computer execute programs in main memory by fetching instructions, examining them, then executing them
  2. bus
    (collection of parallel wires for transmitting address, data, and control signals are external to CPU (i.e. connecting to memory and I/O devices) and internal
  3. control unit
    (responsible for fetching instructions from memory and determining their type)
  4. ALU
    (Arithmetic Logic Unit) performs simple operations such as addition or Boolean AND necessary to execute instructions
  5. CPU composed of?
    control unit, ALU (Arithmetic Logic Unit), registers
  6. CPU also contains small number of high-speed memory cells used to store temporary results and certain control information same-sized storage units can hold one number can be read from and written to at high speed internal to CPU
  7. Program Counter (PC)
    Instruction Address Register always points to next instruction in memory to be fetched for execution
  8. Instruction Register (IR)
    holds instruction currently being executed
  9. consists of registers, ALU, and connecting buses registers feed into two ALU input registers ALU performs simple mathematical operations yielding result in output register result then stored back into (general purpose) register
    Data path
  10. Process of running two operands through ALU and storing result called the?
    data path cycle (heart of most CPUs)
  11. data path cycle (heart of most CPUs)
    defines what machine can do, the faster the cycle, the faster the machine runs
  12. Program that fetches, decodes, and executes instructions of another program known as an?
  13. CISC computers
    Complex Instruction Set Computer large number of possible instructions for interpretation
  14. RISC computers
    Reduced Instruction Set Computer small number of simple instructions that execute in one cycle of the data path
  15. multicomputers
    systems consisting of large number of interconnected computers, each having its own private memory, but no common memory message passing scheme to facilitate sharing of common data
  16. if memory has n cells
    addresses will be 0 to n-1
  17. if a cell consists of k bits
    then it can hold 2k different bit combinations
  18. The data path of a typical Von Neumann machine.