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The DMA request input pin that has the highest priority is

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in Microprocessor by (39.4k points)
The DMA request input pin that has the highest priority is

(a) DREQ0

(b) DREQ1

(c) DREQ2

(d) DREQ3

This question was addressed to me in an interview for job.

My question is taken from Programmable DMA Interface 8237 -2 topic in portion DMA, Floppy Disk and CRT Controllers of Microprocessor

1 Answer

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by (49.2k points)
Right choice is (a) DREQ0

Explanation: DREQ0 has the highest priority while DREQ3 has the lowest one. The priorities of the DREQ lines is programmable.

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