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Flag Register (PSW)

  • Status is indicated with individual bits:
    • 0 - CF - Carry Flag
    • 2 - PF - Parity Flag
    • 4 - AF - Auxiliary carry Flag
    • 6 - ZF - Zero Flag
    • 7 - SF - Sign Flag
    • 8 - TF - Trap Flag
    • 9 - IF - Interrupt Flag
    • 10 - DF - Direcetion Flag
    • 11 - OF - Overflow Flag
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What is psw in 8086 microprocessor?

In the context of the 8086 microprocessor, PSW stands for Program Status Word. It is a 16-bit register that contains flags and status bits that reflect the outcome of arithmetic and logical operations performed by the processor. The PSW includes flags such as the zero flag, carry flag, sign flag, and overflow flag, which are crucial for controlling program flow and making decisions in assembly language programming. The PSW plays a significant role in determining the execution path of a program based on the results of previous instructions.


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