Procedure
- Connect Pin-3 (Input & Output) of ICBase-3 to Pin-20 (Input & Output) of ICBase-2.
- Connect Pin-11 (Input & Output) of ICBase-2 to Pin-20 (Input & Output) of ICBase-2.
- Connect Input-4 to Pin-1 (Input & Output) of ICBase-2.
- Connect Input-2 to Pin-3 (Input & Output) of ICBase-3.
- Connect Input-0 to Pin-5 (Input & Output) of ICBase-4.
- Connect Input-8 to Pin-16 (Input & Output) of ICBase-4.
- Connect Pin-13 (Input & Output) of ICBase-1 to Input-8.