One of the comments here is great and something we should always keep in mind:

> The source code also illustrates a major problem with such code: It doesn’t explain what problem exactly it’s trying to solve. That means the next programmer can’t easily ditch such nonsensical looking code because they can’t be sure that it isn’t solving some relatively widespread and legitimate problem. Testing won’t help too much because it can not be assumed that the hardware in question is actually available for testing.