🚀 go-pugleaf

> I believe it is a 1200XL keyboard. It is not compatible as-is with your
> 400. Probably you could strip off the components and wire your own
> matrix. I didn't find that to be too difficult, but I started with a
> clean keyboard.       - Marshall D. Abrams

In fact, the matrix on the 1200XL keyboard is the same as for the 400.
Adapting it for the 400 requires removing the 2 ICs on the board and
soldering jumpers from the (now) empty holes to the keyboard socket
in the 400.  One can figure out how to do this by reverse engineering
the membrane keyboard or via the Tech. Ref. Manual.
							-Jim