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Which of these register’s contents is used for auto-initialization (internally)?

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in Microprocessor by (39.4k points)
Which of these register’s contents is used for auto-initialization (internally)?

(a) current word register

(b) current address register

(c) base address register

(d) command register

I had been asked this question during an online exam.

Enquiry is from Programmable DMA Interface 8237 -1 topic in chapter DMA, Floppy Disk and CRT Controllers of Microprocessor

1 Answer

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by (49.2k points)
Correct choice is (c) base address register

Easiest explanation: The contents of base address register cannot be read by the CPU. These contents are used internally for auto-initialization.

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