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If the CKM pin of 80387 is high, then 80387 is operated in

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in Microprocessor by (39.4k points)
If the CKM pin of 80387 is high, then 80387 is operated in

(a) real address mode

(b) protected mode

(c) synchronous mode

(d) asynchronous mode

This question was posed to me in an interview.

Question is from Virtual 8086 Mode, The Coprocessor 80387 in portion 32-bit Processors-80386, 80387 and 80486 of Microprocessor

1 Answer

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by (49.2k points)
Right option is (c) synchronous mode

Easiest explanation: If the CKM pin of 80387 is high, then 80387 is operated in synchronous mode. If it is low, then 80387 is operated in asynchronous mode.

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