Integrated Circuits Used 74LS83 74LS85 74LS04 Procedure Add IC 74LS83 into ICBase-1 (74LS83).Add IC 74LS85 into ICBase-2 (74LS85).Add IC 74LS04 into ICBase-3 (74LS04).Add IC 74LS85 into ICBase-4 (74LS85).