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I/O Devices
Registers Status Command Data Interface Internals Figure 36.3: A Canonical Device 36.3 The Canonical Protocol In the picture above, the (simplified) device interface is comprised of three registers: a status register, which can be read to see the current sta-tus of the device; a command register, to tell the device to perform a cer-
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Introduction to Database Systems Module 1, Lecture 1
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