GATE | Quiz for Sudo GATE 2021 | Question 35

A computer responds to an interrupt request signal by pushing onto a full descending stack the contents of PC and the current PSW (program status word), assume that each one will need one word. It then reads a new PSW from memory from a location given by an interrupt address symbolized by IAD. The first address of the service program is taken from memory at location IAD+1. Note: TR (temporary register could be used). Consider the following statements: I. Sequence of micro-operations for the return from interrupt instruction:

SP ← SP-1
M[SP] ← PC
SP ← SP-1
M[SP] ← PSW
TR ← IAD
PSW ← M[TR]
TR ← TR + 1
PC ← M[TR]
Go to fetch phase. 

II. Sequence of micro-operations for the interrupt cycle:

PSW ← M[SP]
SP ← SP+1
PC ← M[SP]
SP ← SP+1

Which of the following option is correct? Note - This question is multiple select questions (MSQ).