Integrated Circuits Used 74LS86 Procedure Add IC 74LS86 into ICBase-1 (74LS86).Connect Pin-14 (Input & Output) of ICBase-2 to Pin-10 (Input & Output) of ICBase-1 (74LS86).Connect Pin-8 (Input & Output) of ICBase-2 to Pin-6 (Input & Output) of ICBase-2.