A microprocessor provides an instruction capable of moving a string of bytes fro

Question

A microprocessor provides an instruction capable of moving a string of bytes from one area of memory to another. The fetching and initial decoding of the instruction takes 10 clock cycles. Thereafter, it takes 15 clock cycles to transfer each byte. The microprocessor is clocked at a rate of 10 GHz.

a. Determine the length of the instruction cycle for the case of a string of 64 bytes.

b. What is the worst-case delay for acknowledging an interrupt if the instruction is non-interruptible?

c. What is the worse-case delay for acknowledging an interrupt if the instruction can be interrupted at the beginning of each byte transfer?

This is a 3 part question. Please show how you got your answer.

Explanation / Answer

a.10+15*64=970 clock cycles=970/(10*10^9)=97 ns b.10 clock cycles=1 ns c.25 clock cycles=2.5 ns

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