![]() So for example to write a disk driver, you might interface with the driver above it (as a disk class) but use a driver below it (scsi port, for example) to actually send commands to your devices. Now the next thing you need to know is that many drivers are actually layered, or stacked, or whichever name you want to use. Specifically, Windows device drivers handle what are called Interrupt Requests via the Interrupt Request Protocol - which boils down to a wrapped up structure and a set of buffers internally in the driver. Write a device driver to pretend to be one.
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