Describe Briefly The Accumulator Register Of 8085.?

Describe Briefly The Accumulator Register Of 8085.?
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1 Answer

Answer :

Answer :It is one of the most important 8 bit register of 8085
It is responsible for coordinating input and output to and from the microprocessor through it.
The primary purpose of this register is to store temporary data and for the placement of final values of arithmetic and logical operations.
This accumulator register is mainly used for arithmetic, logical, store and rotate operations.
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Last Answer : The ALE line of an 8085 microprocessor is used to latch the 8 bits of address lines AD7-AD0 into an external latch.

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In an 8085 microprocessor, the instruction CMP B has been executed while the contentsof accumulator is less than that of register B. As a result carry flag and zero flag will berespectively (A) set, reset (B) reset, set (C) reset, reset (D) set, set

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Last Answer : (A) set, reset

Accumulator based microprocessor example are: a. Intel 8085 b. Motorola 6809 c. A and B d. None of these

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Last Answer : c. A and B

The content of the accumulator after the execution of the following 8085 assembly language program, is: MVI A, 42H MVI B, 05H UGC: ADD B DCR B JNZ UGC ADI 25H HLT (A) 82 H (B) 78 H (C) 76 H (D) 47 H

Description : The content of the accumulator after the execution of the following 8085 assembly language program, is: MVI A, 42H  MVI B, 05H UGC: ADD B DCR B JNZ UGC ADI 25H HLT (A) 82 H (B) 78 H (C) 76 H (D) 47 H

Last Answer : (C) 76 H

The content of the accumulator after the execution of the following 8085 assembly language program, is MVI A, 35H MOV B, A STC CMC RAR XRA B (A) 00H (B) 35H (C) EFH (D) 2FH

Description : The content of the accumulator after the execution of the following 8085 assembly language program, is MVI A, 35H MOV B, A STC CMC RAR XRA B (A) 00H (B) 35H (C) EFH (D) 2FH

Last Answer : (D) 2FH

In an 8085 microprocessor, the contents of the Accumulator, after the following instructions are executed

Description : In an 8085 microprocessor, the contents of the Accumulator, after the following instructions are executed will become   XRA A   MVI B, F0 H   SUB B  (A) 01 H (B) 0F H (C) F0 H (D) 10 H

Last Answer : In an 8085 microprocessor, the contents of the Accumulator, after the following instructions are executed will become   XRA A   MVI B, F0 H   SUB B  (A) 01 H (B) 0F H (C) F0 H (D) 10 H

The zero flag of 8085 microprocessor is to be set keeping the content of the accumulator unchanged.

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In an 8085 microprocessor, the contents of accumulator, after the following instructions are

Description : In an 8085 microprocessor, the contents of accumulator, after the following instructions are executed will become   XRA A   MVI B F0H   SUB B   (a) 01 H (b) 0F H (c) F0 H (d) 10 H

Last Answer : In an 8085 microprocessor, the contents of accumulator, after the following instructions are executed will become   XRA A   MVI B F0H   SUB B   (a) 01 H (b) 0F H (c) F0 H (d) 10 H

The Complement Accumulator (CMA) instruction of 8085 processor on execution affects...

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Last Answer : B

A single instruction to clear the lower four bits of the accumulator I 8085 assembly language is:

Last Answer : A single instruction to clear the lower four bits of the accumulator I 8085 assembly language is: ANI FOH

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Last Answer : Examples: /360: no accumulator 8080: A 6800: A and B 8086: AX ...

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Last Answer : Answer : D

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Description : A group of bits that tell the computer to perform a specific operation is known as_______ A. Instruction code B. Micro-operation C. Accumulator D. Register

Last Answer : A. Instruction code

The load instruction is mostly used to designate a transfer from memory to a processor register known as_________ A. Accumulator B. Instruction Register C. Program counter D. Memory address Register

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A basic instruction that can be interpreted by computer generally has ________ A. An operand and an address B. decoder and an accumulator C. Sequence register and decoder D. None of the Above

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Last Answer : A. Accumulator

The function of these microinstructions is to issue the micro orders to_ _ a. CPU b. Memory c. Register d. Accumulator

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Last Answer : a. CPU

Various machine level components are: a. Address register > Program counter c Data register d. Accumulator register e. Memory of 2K,16 bits/word RAM f. Multiplexers g. Allof these

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Last Answer : g. Allof these

Which is used to store critical pieces of data during subroutines and interrupts: a. Stack b. Queue c. Accumulator d. Data register

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