A better layout for C-264 Emulation

[K-rnivoro]

Hi. As a part of my project www.pimmodore.com, I've developed a better distribution or mapping, of a C-16 virtual keyboard over the C-64 physical keyboard. You can check it here https://www.keymmodore.com/k-64-c-64/. As you can see, when you emulate a C-264 machine, it's much easier to use because it keeps most of the C64 keys in it's original position. You do not have to guess where the C16 keys are, mainly the cursor keys. I'm not sure if it is also possible to implement in the GPIO keyboard routine of BMC64, but it would be a very nice option I think.