In this post we will learn the useful skill of writing a device driver for Unix V6 (released in 1975) and run it on an emulator. The implemented device is fairly trivial: it will open a message box on the host OS.
Read this article now. Everybody needs to know how to do this.
https://www.osnews.com/story/134675/writing-a-device-driver-for-unix-v6/
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