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In 8 bit signed number operations, OV flag is set to 1 if:

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in Microcontroller by (14.6k points)
In 8 bit signed number operations, OV flag is set to 1 if:

(a) a carry is generated from D7 bit

(b) a carry is generated from D3 bit

(c) a carry is generated from D7 or D3 bit

(d) a carry is generated from D7 or D6 bit

This question was addressed to me during an interview for a job.

The origin of the question is Arithmetic and Logic Instructions in portion 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
The correct option is (d) a carry is generated from D7 or D6 bit

The explanation is: In 8 bit operations, if a carry is generated from D6 or D7 bit, then OV flag is set to 1.

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