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The flag that is additional in flag register of 80386, compared to that of 80286 is

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The flag that is additional in flag register of 80386, compared to that of 80286 is

(a) VM flag

(b) RF flag

(c) VM and RF flag

(d) None of the mentioned

This question was posed to me in an online quiz.

This intriguing question originated from Register Organisation of 80386 -1 topic in portion 32-bit Processors-80386, 80387 and 80486 of Microprocessor

1 Answer

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The correct choice is (c) VM and RF flag

The explanation: The VM and RF flags are added to the 80286 flag register, to derive the flag register of 80386.

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