|Other version with the same title:
Many thanks to John Hardie for dumping / scanning the cartridge prototype!
Additional heads up to Roland B. Wassenberg for his page at https://atariwiki.org/wiki/Wiki.jsp?page=Atari%20Calculator from where the following bonus material was taken:
_ original written notes of cartridge specifications by author Carol Shaw
_ Cheat Sheet by InverseATASCII
Missing original disk image!