Ben,
I loved your show but you did it the hard way!
An unmodified Chatpad has a 19200 serial interface which pumps out keypress and depress events.
All you needed to do is connect the keyboard directly to the Arduino with a pencil plug socket and use simple keyboard driver that converts the chatpad keyboard events into ASCII code for the BASIC.
Cheers!
Very Compact
Behold! The future of digital communication.
Seiko UC-2000
This 10x4 screen, micro-computer of 1984, sports 4K ram, with 26K ROM space. (being games and Microsoft Basic programming evnironment.)
It even had a small printer and full size keyboard. Both keysets act as a dock for the watch.
Everything old is new again.
Cabe
Behold! The future of digital communication.
Seiko UC-2000
This 10x4 screen, micro-computer of 1984, sports 4K ram, with 26K ROM space. (being games and Microsoft Basic programming evnironment.)
It even had a small printer and full size keyboard. Both keysets act as a dock for the watch.
Everything old is new again.
Cabe
