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If Numeric Processor Read (NPRD) active-low input pin is activated, then it enables a data transfer from

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If Numeric Processor Read (NPRD) active-low input pin is activated, then it enables a data transfer from

(a) memory to processor

(b) 80287 to 80286

(c) 80286 to 80287

(d) 8086 to 80287

I have been asked this question in a dream while sleeping

My query is from 80287 Math Coprocessor -2 topic in section 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

1 Answer

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by (49.2k points)
Right option is (b) 80287 to 80286

Explanation: If Numeric Processor Read (NPRD) active-low input pin is activated, then it enables a data transfer from 80287 to 80286.

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