GATE | GATE-CS-2000 | Question 9
The 8085 microprocessor responds to the presence of an interrupt
(A) As soon as the TRAP pin becomes ‘high’
(B) By checking the TRAP pin for ‘high’ status at the end of each instruction fetch
(C) By checking the TRAP pin for ‘high’ status at the end of the execution of each instruction
(D) By Checking the TRAP pin for ‘high’ status at regular intervals
The microprocessor recognizes interrupt request on request lines(RST7.5,RST 5.5,RST 6.5,TRAP,INTR) at the end of current instruction execution.
TRAP is non maskable interrupt .TRAP is active high ,level,edge triggered non maskable highest priority interrupt.when TRAP line is active microprocessor insert intervals restarts automatically at vector location of TRAP.
So correct option is (C).
Quiz of this Question
Attention reader! Don’t stop learning now. Practice GATE exam well before the actual exam with the subject-wise and overall quizzes available in GATE Test Series Course.
Learn all GATE CS concepts with Free Live Classes on our youtube channel.