想请问各位，下面这题，如果他给的ADDRESS不是数字，要怎对应到CACHE，还有平 均记忆体时间要怎计算^^ 感谢!! Consider cache memories with associative mapping and direct mapping. The average memory access time, TM, is the weighted average of the cache access time, TC, plus the access time for physical memory, TP. The weighting factor is the hit-ratio h. TM can be expressed as TM = hTC + (1 - h)TP Now, if the size of cache is 8 bytes and the data sequence is described as A0 B0 C2 A0 D1 B0 E4 F5 A0 C2 D1 B0 , where the subscript for each value is the low-order 3 bits of its address in physical memory and such values will be utilized for cache activity of direct mapping. Assume that TC = 8ns, TP = 50ns and the above cache is initially empty and uses a FIFO replacement policy. (1) Find the hit-ratio h and average memory access time TM for the associative mapping. (2) Find the hit-ratio h and average memory access time TM for the direct mapping. --

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