1

GATE ECE 1994

Subjective

+5

-0

Write down the sequence of Instructions which are actually (till HLT instruction), if the program begins with the location 1FF5H.

2

GATE ECE 1991

Subjective

+5

-0

The program given below is run on an 8085 based microcomputer system. Determine the contents of the registers: PC, SP, B,
C, H, L after a half instruction is executed.

LOC

2000 START: LXI SP, 1000H

LXI H, 2F37 H

XRA A

MOV A, H

INX H

PUSH H

CZ 20 FF H JMP 3000 H

HLT

20FF ADD H

RZ

POP B

PUSH B

RNZ

HLT

LOC

2000 START: LXI SP, 1000H

LXI H, 2F37 H

XRA A

MOV A, H

INX H

PUSH H

CZ 20 FF H JMP 3000 H

HLT

20FF ADD H

RZ

POP B

PUSH B

RNZ

HLT

Questions Asked from Instruction Set and Programming with 8085 (Marks 5)

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