Specify the mode byte for DMA channel 2 if it is to transfer data from an input device to a memory buffer starting at address A000H and ending at AFFFH. Ensure that μp is not completely locked off the bus during the DMA cycle. Moreover, at the end of each DMA cycle, the channel is to be reinitialized so that the same buffer is to be filled when the next DMA operation is initiated?

Specify the mode byte for DMA channel 2 if it is to transfer data from an input device to a memory buffer starting at address A000H and ending at AFFFH. Ensure that μp is not completely locked off the bus during the DMA cycle. Moreover, at the end of each DMA cycle, the channel is to be reinitialized so that the same buffer is to be filled when the next DMA operation is initiated?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter11: Operating Systems

Section: Chapter Questions

Problem 26VE

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