1

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

2

GATE ECE 2004

MCQ (Single Correct Answer)

+2

-0.6

Consider the sequence of 8085 instructions given below.

LXI H, 9258

MOV A, M

CMA

MOV M, A

Which one of the following is performed by this sequence?

LXI H, 9258

MOV A, M

CMA

MOV M, A

Which one of the following is performed by this sequence?

3

GATE ECE 2003

MCQ (Single Correct Answer)

+2

-0.6

In an 8085 microprocessor, the instruction CMP B has been executed while the
content of the accumulator is less than that of register B. As a result

4

GATE ECE 2002

MCQ (Single Correct Answer)

+2

-0.6

The contents of Register (B) and Accumulator (A) of 8085 microprocessor are 49H and 3AH respectively. The contents of A and the status of carry flag (CY) and sign flag (S) after executing SUB B instructions are

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

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics