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#f blocks in Cache = C then log C bits

W words present in per Block

Word Offset = log W bits

Tag Bits = 6 bits.

So by Direct Mapping  Physical Address = 6+ log C + log W

Now the Cache Memory is upgraded with 64 way set Associative.

1 set acquire 64 blocks, #f sets = C/64 = log(C/64)

So by Associative Mapping Physical Address = Ntag + Log(C/64) +Log W

Physical Address are same.

Ntag =12 bits.

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