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Each bit in the request register is cleared by

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in Microprocessor by (39.4k points)
Each bit in the request register is cleared by

(a) under program control

(b) generation of TC

(c) generation of an external EOP

(d) all of the mentioned

This question was addressed to me by my college director while I was bunking the class.

Question is taken from Programmable DMA Interface 8237 -2 in chapter DMA, Floppy Disk and CRT Controllers of Microprocessor

1 Answer

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by (49.2k points)
Correct choice is (d) all of the mentioned

The best explanation: In the request register, each bit is set or reset under program control or is cleared upon generation of a TC or an external EOP.

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