[Coco] Recreating the CoCo keyboard

[Ciaran Anscomb]

Allen Huffman wrote:
> > On Oct 20, 2020, at 7:06 PM, James Jones <jejones3141 at gmail.com>
> > wrote:
> >
> > KRO = key rollover, I suspect.
> 
> Well, that would be whatever Windows/MacOS/Linux do with a USB keyboard,
> then.

I think USB has some small but practical limit to the number of
simultaneous keypresses (six?), but which sets of keys can be recognised
at the same time is down to the keyboard itself.

As an example, I think it's nigh on impossible to play (unpatched)
Donut Dilemma under emulation on some PC keyboards.

..ciaran