chynawalker1709 chynawalker1709
  • 21-07-2020
  • Computers and Technology
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A cache has been designed such that it has 512 lines, with each line or block containing 8 words. Identify the line number, tag, and word position for the 20-bit address 94EA616 using the direct mapping method.

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batolisis
batolisis batolisis
  • 21-07-2020

Answer:

Given address = 94EA6[tex]_{16}[/tex]

tag = 0 * 94  ( 10010100 )

line = 0 * 1 D 4 ( 111010100 )

word position = 0*6 ( 110 )

Explanation:

using the direct mapping method

Number of lines = 512

block size = 8 words

word offset = [tex]log ^{8} _{2}[/tex]  = 3 bit

index bit = [tex]log^{512}_{2}[/tex]  = 9 bit

Tag = 20 - ( index bit + word offset ) = 20 - ( 3+9) = 8 bit

Given address = 94EA6[tex]_{16}[/tex]

tag = 0 * 94  ( 10010100 )

line = 0 * 1 D 4 ( 111010100 )

word position = 0*6 ( 110 )

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