computer systems

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6 Terms

1
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signed magnitude pros

  • simple and intuitive representation

  • easy to convert unsigned values to signed positive numbers (just add 0 as sign bit)

2
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signed magnitude cons

  • sign bit makes it difficult to do arithmetic

  • 2 representations of 0, makes no sense

3
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ones complement pros

easy to perform addition so simple circuits

4
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ones complement cons

2 representations of 0

5
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twos complement pros

  • no special bits so simple circuits

  • single representation of 0

6
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2 reasons why computers use binary

  1. computers use transistors which only have 2 states

  2. efficient for boolean computational logic