Multiple choice

Consider the following sequence of micro–operations: MBR$\leftarrow$ PC MAR $\leftarrow$X PC $\leftarrow$Y Memory MBR Which one of the following is a possible operation performed by this sequence?

  1. Instruction fetch

  2. Operand fetch

  3. Conditional branch

  4. Initiation of interrupt service
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

PC content is stored in memory via MBR and PC gets new address from Y. It represents a function call (routine), which is matching with interrupt service initiation.

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