During direct memory access (DMA), the INTR and INTA (interrupt and interrupt acknowledge) lines:

Question

TuteeHUB · Accepted Answer

are used by the DMA controller to acquire the data and address bus from the microprocessor

TuteeHUB · Answer

are never used

TuteeHUB · Answer

are used by the IO device to invoke an error routine if a problem occurs during DMA transfer

TuteeHUB · Answer

are used by the DMA controller to signal the microprocessor about the end of the current data

1.	During direct memory access (DMA), the INTR and INTA (interrupt and interrupt acknowledge) lines:
A.	are never used
B.	are used by the DMA controller to acquire the data and address bus from the microprocessor
C.	are used by the IO device to invoke an error routine if a problem occurs during DMA transfer
D.	are used by the DMA controller to signal the microprocessor about the end of the current data
Answer» B. are used by the DMA controller to acquire the data and address bus from the microprocessor

Discussion