There are 64 bytes in one cache. Since there are 256 bits for data.Thus,there are 256 sets of 2 lines in a cache memory each. total 8 bits are required to identify the number of set number.For the 64 Mbyte main memory, a 26-bit address is needed. For the 64-MB main memory which consists of 2^22 cells.Therefore, the bits for set plus tag length would be 22 bits, tag length is 14 bits and the word field length is 4.
Explanation:
1 cache = 64 bytes
16 bits for "tag" and 256 bits (32 bytes) for data.
