Question
Download Solution PDFThe 8th bit of program status word (PSW) of 8086 microprocessor represents which of the following flags?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFProgram Status Word (PSW)
- The Program Status Word (PSW) contains status bits that reflect the current CPU state.
- It is a 16-bit register, seven bits remain unused while the rest nine are used.
- Out of nine bits, six are status flags and three are control flags.
- The 8th bit represents the trap flag.
- The control flags are DF (Direction Flag), IF (Interrupt Flag), and TF (Trap Flag).
- The status flags are CF (Carry Flag), AF (Auxiliary Carry Flag), SF (Sign Flag), ZF (Zero Flag), PF (Parity Flag), and OF (Overflow Flag).
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