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Among eight debug registers, DR0-DR7, the registers that are reserved by Intel are

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Among eight debug registers, DR0-DR7, the registers that are reserved by Intel are

(a) DR0, DR1, DR2

(b) DR4, DR5

(c) DR1, DR4

(d) DR5, DR6, DR7

The question was asked in an interview for job.

I need to ask this question from Register Organisation of 80386 -2 in division 32-bit Processors-80386, 80387 and 80486 of Microprocessor

1 Answer

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by (49.2k points)
Right choice is (b) DR4, DR5

Explanation: Out of the eight debug registers, the two registers DR4 and DR5 are Intel reserved.

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