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The register that maintains an original copy of the respective initial current address register and current word register is

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The register that maintains an original copy of the respective initial current address register and current word register is

(a) mode register

(b) base address register

(c) command register

(d) mask register

The question was asked in homework.

My question is based upon Programmable DMA Interface 8237 -1 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) base address register

The best explanation: The base address register maintains an original copy of the current address register and current word register, before incrementing or decrementing.

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