WTF Rules!

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> Ok, so this is mainly for my benefit, with a question mixed in... > > The 48k keyboard is an 8 by 5 matrix, which needs 13 GPIO pins......

> ![proto_keyboard](https://user-images.githubusercontent.com/6271680/182035136-4d76db10-64f6-49f5-a522-ab9f326144f1.jpg) > > Waiting on some hookup wires now. Oh so nice!

> Ohhhh yessssssssss! The good is coming!

> I've pushed some changes and a new uf2 to the main branch. For the example mappings see: > > https://github.com/fruit-bat/pico-zxspectrum/blob/main/src/ZxSpectrumKeyMatrix.cpp > > It now supports an 8x8 key matrix....