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<p>Hello everyone,</p>
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<p> I want to implement some virtual hardware in QEMU for driver testing. For example, to implement a timer which sends interrupt to CPU periodically. However, I can't find any documentation which details the interfaces and the framework. The only clue is
the `hw` directory in the source tree of QEMU, but it is so complex for a beginners to start up.</p>
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<p> So, are there helpful videos or articles? </p>
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<p> Regards!</p>
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