Sign-Magnitude Representation for Integers

• Add a sign bit

  • Example: 0101102 = 2210 ; 1101102 = -2210

• Advantages:

  • Simple extension of unsigned numbers.
  • Same number of positive and negative numbers.

• Disadvantages:

  • Two representations for 0: 0=000000; -0=100000.
  • Algorithm (circuit) for addition depends on the arguments’ signs.

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