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GATE EC 2022: Digital Circuits Quiz 8

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Question 1

A memory is mapped to 8085 microprocessor. The memory map is B00F to FCDE H. The number of bytes stored in memory are (____________)10.

Question 2


An I/O device is interfaced to an 8085 microprocessor. To select the I/O device in the I/O address range A8H-B9H, the chip select CS is to be connected to which output of the decoder?

Question 3

It is required to construct a memory of 1024 words with 4 bytes per word, organized in a matrix having 16 rows and 16 columns. Each intersection of row and column stores 1 bit. The number of matrices required are

Question 4

The following FIVE instructions were executed on an 8085 microprocessor.
MVI A, 33H
MVI B, 78H
ADD B
CMA
ANI 32H
The Accumulator value immediately after the execution of the fifth instruction is

Question 5

Consider the program given below for INTEL 8085
MVI C, 0B H
LXI H, 2400 H
LXI D, 3400 H
LOOP MOV A, M
STAX D
INR L
INR E
DCR C
JNZ LOOP
HLT
The total number of memory accesses required are _______.

Question 6

There are four chips each of 1024 bytes connected to a 16 bit address bus address bus as shown in the figure below. RAMs, 1, 2, 3, and 4 respectively are mapped to addresses
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Sep 19ESE & GATE EC

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Mayank SoniMayank SoniMember since Mar 2021
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