HP41C with Rp Pico attached

[ThomasF]

Hi,

Found some time and connected a Tiny2040 to the 41 with success.
The Tiny2040 is small enough to fit in a small box

I can analyze the bus, decode the display-instruction etc, all through an old module case and connector, so no need to open the 41 (so I'm missing the keyboard events).

I have yet to get the driving of the ISA-port to work, to be able to emulate modules, but so far all good!

(The yellow text is just a test of the 41 font, but the blue text just below is the copy of the actual 41 display,
rest is just debug-info)

Cheers,
Thomas