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The data bus in a floating point unit is of

(a) 16 bits

(b) 32 bits

(c) 64 bits

(d) 84 bits

I got this question by my school teacher while I was bunking the class.

The doubt is from 80287 Math Coprocessor -1 topic in chapter 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

1 Answer

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by (49.2k points)
Correct option is (d) 84 bits

Easiest explanation: The data bus in a floating point unit is of 84-bits. Out of this 84-bits, the lower 68 bits are significant (mantissa) data bit, the next 16 bits are used for the exponent.

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