Question

Most modern processors have a status register which include bits that specify whether it is running in supervisor or user state, and whether interrupts are enabled. Explain why this information is useful and what effect they have on instruction execution.​

Answer 1

Answer:

The status register lets an instruction take action contingent on the outcome of a previous instruction. Typically, flags in the status register are modified as effects of arithmetic and bit manipulation operations. For example, a Z bit may be set if the result of the operation is zero and cleared if it is nonzero.