Look at and learn from "I am Rob"'s version

[inexorabletash]

https://groups.google.com/g/comp.sys.apple2/c/jxsST6tDVRA/m/fPcCOKHdCQAJ

Usenet poster "I am Rob" did something similar, but I think using the aux language card?

He also put together an amazing collection of IB programs.