Inside the vintage 74181 ALU chip: how it works and why it's so strange
digital logic - 74181 ALU not working properly cascaded to add 8 bit numbers - Electrical Engineering Stack Exchange,Inside the 74181 ALU chip: die photos and reverse engineering,Inside the vintage 74181 ALU chip: how it works and why it's so strange,Inside the 74181 ALU chip: die photos and reverse engineering