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In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, then

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In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, then

(a) zero flag is reset

(b) carry flag is set

(c) VM flag is set

(d) RF flag is reset

The question was asked in a dream while sleeping

My question is taken from Enhanced Instruction Set of 80386 topic in section 32-bit Processors-80386, 80387 and 80486 of Microprocessor

1 Answer

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by (49.2k points)
Right choice is (b) carry flag is set

Explanation: In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, the carry flag is set, otherwise it is cleared.

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