Integrated Circuits Used 74LS85 Procedure Add IC 74LS85 into ICBase-2 (74LS85).Connect GND Port to Pin-1 (Input) of ICBase-2 (74LS85).Connect GND Port to Pin-2 (Input) of ICBase-2 (74LS85).Connect GND Port to Pin-4 (Input) of ICBase-2 (74LS85).