The AT28C16 is an old-school 2k x 8-bit parallel EEPROM. Since it has parallel addressing and data lines, it opens a whole range of possibilities with discrete logic circuits (i.e. no SPI or I²C in sight).
I was inspired to explore more by Ben Eater’s use of EEPROMs for his 8-bit computer build.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
