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8086 Assembly Language Fundamentals
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What is the value of over flow (O) flag after the instruction: SUB AX,AX
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A
Cleared
💡 Explanation:
The instruction 'SUB AX, AX' performs a subtraction of a register from itself (AX - AX), which always results in zero. Since 0 - 0 does not cause an arithmetic overflow (the result fits in the destination), the Overflow (O) flag is cleared (0).