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(a) Arithmetic operations (b) Logic operations (c) Data transfer operations (d) Branch operations

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Which group of instruction do not affected the flag in microprocessor?

branch instruction


What is a standing instruction?

A standing instruction is an instruction that remains in effect for an indefinite time. That is, it remains in effect until the office or person who issued the instruction retracts or cancels it.


Will DCX instruction affect the zero flag?

no....it does not aff


Why increment INR instruction in 8085 does not affect carry flag?

INR affect the carry flag.


When did Flag Group end?

Flag Group ended in 1990.


When was Flag Group created?

Flag Group was created in 1986.


What is the use of direction flag and Trace flag in 8086?

The direction flag (DF) controls the direction of repeated string instructions. The trap flag (TF) executes one instruction and then executes a debug (INT 1) instruction so that a debugger can single step through a program.


If the accumulator has C5H from a previous instruction and the carry flag is set then what will be the contents of the accumulator and carry flag after executing the instruction ADI 94H?

If you add 94H to C5H with the ADI instruction, the result in the accumulator will be 59H and the carry flag will be set. It does not matter what value the carry flag had to start with, because you said ADI, instead of ACI. (For ACI, the result would be 5AH with carry set.)


How is parity flag affected with the or instruction in 8086 microprocessor?

In the 8086 microprocessor, the parity flag (PF) is affected by the OR instruction based on the result of the operation. The parity flag is set if the number of set bits (1s) in the result is even; it is cleared if the number of set bits is odd. Therefore, after executing an OR instruction, the parity flag reflects the parity of the result of the logical OR operation performed on the operands.


What is lahf instruction?

LAHF (Load Accumulator High Flag) is an assembly language instruction used in x86 architecture to load the status of the flags in the processor's status register into the lower byte of the accumulator (AL register). Specifically, it transfers the state of the Sign Flag (SF), Zero Flag (ZF), Auxiliary Carry Flag (AF), and Parity Flag (PF) into the AL register. This instruction is often utilized for status checking and manipulation in low-level programming. It is part of the instruction set that allows for more complex control flow and condition handling in assembly programming.


Why DAD instruction only affect carry flag in 8085?

Carry


Difference between variation order and site instruction?

Variation Order is a Site Instruction which have effect on Time, Quality and Cost. But if we entitled it as Site Instruction only, usually it does not have effect on Time, Quality and Cost.