qmk-firmware/keyboards/converter/numeric_keypad_IIe/keymaps/default
..
keymap.c
readme.md

Numeric Keypad //e Default Keymap

All keys perform their default functions displayed on the stock keycaps. Note that the "Print" key presses a question mark (?), which was the default behavior on the Apple //e (with ? the shorthand for the AppleSoft BASIC PRINT command).