Computers have had DMA for doing I/O for decades. Did this cause any problems before there were

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Computers have had DMA for doing I/O for decades. Did this cause any problems before there were I/O MMUs?

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Modern Operating Systems

ISBN: 978-0133591620

4th edition

Authors: Andrew S. Tanenbaum, Herbert Bos

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Question Posted: Apr 07, 2016 07:29 AM

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On early computers, every byte of data read or written was handled by the CPU (i.e., there was no DMA). What implications does this have for multiprogramming?
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Computers have had DMA for doing I/O for decades. Did this cause any problems before there were

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Yes Early DMA hardware used absolute memory addresses If a guest opera...View the full answer

Modern Operating Systems

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