8085 Microprocessor programming kit
it's probably code in the monitor ROM: something needs to run to make the keypad work.

Entering code by punching in hex or toggling switches gets tedious fast,
so trainers for Von-neuman processors like 8085 typically profide a means to load student software into ram from an externmal source (like a PC) and facilitatre this by means of an interface cable and some ROM code