1

GATE ECE 2005

MCQ (Single Correct Answer)

+2

-0.6

Consider an 8085 microprocessor system

The following program starts at locaton 0100H.

LXI SP, 00FF

LXI H, 0107

MVI A, 20H

SUB M

The contents of accumulator wnen the program counter reaches 0109H is

2

GATE ECE 2005

MCQ (Single Correct Answer)

+2

-0.6

Consider an 8085 microprocessor system

If in addition following code exists from 0109H onwards ORI 40H, ADD M What will be the result in the accumulator after the last instruction is executed

3

GATE ECE 2004

MCQ (Single Correct Answer)

+2

-0.6

The number of memory cycles required to execute the following 8085 instructions

(I.) LDA 3000H

(II.) LXI D, FOF 1H

Would be

(I.) LDA 3000H

(II.) LXI D, FOF 1H

Would be

4

GATE ECE 2004

MCQ (Single Correct Answer)

+2

-0.6

It is desired to multiply the numbers 0AH by 0BH and store the result in the accumulator. The numbers are available in registers B and C respectively. A part of the 8085 program for this purpose is given below:

MVI A, 00H

LOOP:.........

...............

HLT END

MVI A, 00H

LOOP:.........

...............

HLT END

The sequence of instruction to be complete the program would be

Questions Asked from Instruction Set and Programming with 8085 (Marks 2)

Number in Brackets after Paper Indicates No. of Questions

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics