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In 8257 (DMA), each of the four channels has

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in Microprocessor by (39.4k points)
In 8257 (DMA), each of the four channels has

(a) a pair of two 8-bit registers

(b) a pair of two 16-bit registers

(c) one 16-bit register

(d) one 8-bit register

I got this question in exam.

The origin of the question is DMA Controller 8257 topic in portion DMA, Floppy Disk and CRT Controllers of Microprocessor

1 Answer

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by (49.2k points)
Right answer is (b) a pair of two 16-bit registers

Easy explanation: The DMA supports four channels, and each of the channels has a pair of two 16-bit registers, namely DMA address register and a terminal count register.

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