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Questions and Answers
Which of the following modes allows multiple 8088 programs to run in protected mode?
Which of the following modes allows multiple 8088 programs to run in protected mode?
- Virtual 86 mode (correct)
- 32/32 mode
- Protected mode
- Real mode
What is the purpose of a DMA controller circuit?
What is the purpose of a DMA controller circuit?
- All of the above
- To generate necessary address and control signals (correct)
- To keep track of the bytes transferred
- To transfer data on every clock cycle
What is the main processor's state during a DMA transfer?
What is the main processor's state during a DMA transfer?
- Active
- None of the above
- Inactive
- High impedance (correct)
What is the disadvantage of not using a DMA controller for data transfer?
What is the disadvantage of not using a DMA controller for data transfer?
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Is the DMA controller treated as an I/O device during data transfer?
Is the DMA controller treated as an I/O device during data transfer?
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