Table of Contents
What is the function of RAR instruction?
In 8085 Instruction set, RAR stands for “Rotate Accumulator Right involving Cy flag in rotation”. It rotates the Accumulator contents to the right by 1-bit position.
What is the content of the accumulator?
The accumulator is an 8-bit register that is a part of arithmetic/logic unit (ALU). This register is used to store 8-bit data and to perform arithmetic and logical operations. The result of an operation is stored in the accumulator.
What is content of accumulator of 8085 microprocessor after the execution of Xri f0 H instruction?
The content of accumulator are 70 H. Initially all flags are zero.
Which of the following instructions shift the content of accumulator logically?
ROTATE is a logical operation of 8085 microprocessor. It is a 1 byte instruction. This instruction does not require any operand after the opcode. It operates the content of accumulator and the result is also stored in the accumulator.
Which instruction shifts the contents of accumulator logically?
Shift Instructions: SRA (Shift Right Logical Accumulator) A value must be put into the shift-count location before the operation is started. The operation is ended when the specified number of shifts have been performed.
Which of the following instructions will multiply the contents of the accumulator by 2?
The instruction ADD a will add the content of the accumulator to itself; this is equivalent to multiplying by 2.
Why 8085 is called accumulator based processor?
Register A is an 8-bit register used in 8085 to perform arithmetic, logical, I/O & LOAD/STORE operations. Register A is quite often called as an Accumulator. An accumulator is a register for short-term, intermediate storage of arithmetic and logic data in a computer’s CPU (Central Processing Unit).
What is an electronic accumulator?
An accumulator is a functionally rechargeable device that is used for harnessing electrical energy stored in the form of chemical energy. Accumulators typically consist of one or more separate cells depending on the amount of energy they are required to store and/or dispense.
What will be the content of register A after the execution of following 8085 programs?
Contents of A register after the execution of the following 8085 microprocessor program is MVIA,55 H MVI C,25 H ADD C DAA. 5) A thread is usually defined as a ‘light weight process’ because an operating system (OS) maintains smaller data structures for a thread than for a process.
What does the instruction PCHL in 8085 do?
PCHL: it loads the program counter with HL data. the content of H placed into higher order byte and L placed at low order bytes.