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5. Digital techniques / Electronic instrument systems

The arithmetic logic unit (ALU) in a central processor unit (CPU) carries out

  • addition, subtraction, multiplication and division.
  • data storage, retrieval, and logical comparisons.
  • timing, synchronisation, and bus control operations.

Explanation from PART66Online

The ALU is dedicated to arithmetic (add, subtract, multiply, divide) and logic operations on data. Data storage and retrieval are functions of registers and memory, not the ALU, while timing and bus control belong to the control section, so the answer listing those is wrong.

H

hasdim_1969 asked · 9 Jan 2013

aren't multiplication and division result of addition and subtraction?

Community Comments (2)

P
PART66Online 10 Jan 2013
Yes, you right. But it is ALU's business, how to do multiplication and division. Question is what ALU do. You should know what ALU handle mathematical computations and logic comparisons.
H
hasdim_1969 10 Jan 2013
why answering computations as instructed is wrong? Aren't computations
addition, subtraction, multiplication and division?

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