HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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Solution - State the Different Hardware Interrupts With Their Priorities and Branching Addresses. - HSC Science (Computer Science) 12th Board Exam - Computer Science 2

Questions

State the different hardware interrupts with their priorities and branching addresses.

What are the Hardware Interrupts ? Explain Vectored and Nonvectored Interrupts of 8085 MPU.

Solution

8085 provides 5 hardware interrupts:
(i) TRAP (ii) RST 7.5 (ii) RST 6.5 (iv) RST 5.5 (v) INTR

(1) These interrupts are vectored interrupts. It means that when these interrupts are given , it is directed (or vectored) to transfer the control to specific memory location given by 

 TRAP = 4.5×8 = 0024H        RST7.5= 7.5 x 8 = 003C H
 RST 6.5=6.5x8 = 0034 H      RST 5.5 = 5.5 x 8 = 002C H

(2) Among these interrupts, TRAP is non- maskable interrupt which can not be disabled. But the other four interrupts are maskable interrupts, which can be disabled.

(3) The TRAP has highest priority and the INTR has lowest priority among the hardware interrupts. The hardware interrupts in descending order of priority are listed below:

(i) TRAP - highest priority (ii) RST 7.5 (iii) RST 6.5 (iv) RST 5.5 (v) INTR - lowest priority.

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APPEARS IN

 2014-2015 (March) (with solutions)
Question 2.2.1 | 4 marks
 2015-2016 (March) (with solutions)
Question 3.2.1 | 4 marks
 2016-2017 (March) (with solutions)
Question 2.2.2 | 4 marks
Solution for question: State the Different Hardware Interrupts With Their Priorities and Branching Addresses. concept: Introduction to Microprocessors and Organization of 8085. For the course HSC Science (Computer Science)
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