1. Computer System Structure and Components
switch to the interrupt routines very frequently to move the data in the controller buffer to main memory (switching overhead). Good for byte (or word)-based slower devices (e.g., keyboard, serial port) Direct Memory Access (DMA) 1) Application program (process) calls an I/O system call and waits for the I/O completion.
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Microsoft Windows Internals, Fourth Edition: Microsoft …
csit.udc.eduPUBLISHED BY Microsoft Press A Division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright © 2005 by David Solomon, Mark Russinovich
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