Bootstrapping landscape alphanumeric RPN

[Jim Horn]

Oh, good heavens, don't use the HP-67 AOS program! It was done to prove it was possible but it's impossibly slow. I just wanted to see that a full ~13 level parenthesis implementation could be done on the '67. With its limited speed and memory, the results work but could take many seconds per key press.

I do second the suggestion to work with Free42 or the WP-34S simulators. That way you can concentrate on key labeling and use rather than the heavier duty work of actual functions, most user interaction, etc.

Best to you!