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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 dad and what are the flags affected by dad in 8085?
In the 8085 microprocessor, DAD (Double Add) is an instruction that adds the contents of a specified 16-bit register pair (HL, BC, or DE) to the contents of the accumulator (A) and stores the result back in the 16-bit register pair. The flags affected by the DAD instruction are the Carry flag (CY) and the Parity flag (P). The Zero flag (Z) and Sign flag (S) remain unaffected. Additionally, the Auxiliary Carry flag (AC) is also not affected by this operation.
What is the purpose of adc instruction according to 8085 microprocessor?
this instruction is used to add the specified register content to that of the accumulator along with the carry flag value. this instruction is used in processes which involve continuous addition.
Which flags are affected after ADD instruction?
After an ADD instruction, the flags affected typically include the Zero Flag (ZF), which is set if the result is zero; the Sign Flag (SF), which indicates the sign of the result; the Carry Flag (CF), which is set if there is a carry out of the most significant bit; and the Overflow Flag (OF), which is set if there is an overflow in signed arithmetic. Additionally, the Parity Flag (PF) may also be affected, depending on the result's parity.
What is the use of debug in 8086 microprocessor?
The debug flag in the 8086/8088 microprocessor causes one instruction to be executed, followed immediately by a debug interrupt. The flag then gets turned off, so you get get nested debug interrupts. This is used by a debugger program to single step a process that it is debugging (the debugee, so to speak).
What is the importance of flags in microprocessor?
sign flag parity flag zero flag
Which flag bit controls INTR pin on the microprocessor?
I flag
What is compare instruction 8086 microprocessor?
the compare instruction of 808 is used to compare the 2 operands. syntax: cmp op1,op2 algorithm: op1-op2 the value of the operands are not affected only the flags are updated if op1<op2 carry=1 and zero flag=0 if op1=op2 cy=0 and zf=1 if op1>op2 cy=0 and zf=0
What are the flags affected after add instruction execution?
After the execution of an ADD instruction, the following flags in the processor's status register may be affected: the Zero Flag (ZF), which is set if the result is zero; the Sign Flag (SF), which indicates if the result is negative; the Carry Flag (CF), which is set if there is an overflow from the most significant bit; and the Overflow Flag (OF), which is set if the addition results in an overflow for signed integers. Additionally, the Parity Flag (PF) may also be updated based on the parity of the result.
Which group of instruction do not effect the flag?
(a) Arithmetic operations (b) Logic operations (c) Data transfer operations (d) Branch operations
Difference between rlc and ral in 8085?
In the 8085 microprocessor, the RLC (Rotate Left Carry) instruction shifts all bits of the accumulator left by one position, with the most significant bit (MSB) moving to the carry flag. In contrast, the RAL (Rotate Left Accumulator) instruction rotates the bits of the accumulator left without affecting the carry flag, as the carry bit is incorporated back into the least significant bit (LSB) of the accumulator. Essentially, RLC modifies the carry flag, while RAL involves the accumulator only.
Will DCX instruction affect the zero flag?
no....it does not aff
