Q. Which of the following command is used to make all the internal registers of 8237 clear?

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Q. The transfer of a block of data from one set of memory address to another takes place in

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Q. The mode of 8237 in which the device transfers only one byte per request is

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Q. In demand transfer mode of 8237, the device stops data transfer when

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Q. To complete a DMA transfer, a memory to memory transfer requires

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Q. When interface 8237 does not have any valid pending DMA request then it is said to be in

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Q. The DMA request input pin that has the highest priority is

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Q. The pin that clears the command, request and temporary registers, and internal first/last flipflop when it is set is

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Q. The register that keeps track of all the DMA channel pending requests and status of their terminal counts is

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Q. The register that holds the data during memory to memory data transfer is

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Q. Each bit in the request register is cleared by

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Q. Which of the following is a type of DMA transfer?

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Q. The register that can be automatically incremented or decremented, after each DMA transfer is

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

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

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Q. The current address register is programmed by the CPU as

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Q. When the count becomes zero in the current word register then

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Q. The register that holds the data byte transfers to be carried out is

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Q. The register that holds the current memory address is

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Q. The priority between the DMA channels requesting the services can be resolved by

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