74181

74181

I don't understand why the operates the way it does. It does provide the full set of logic functionality (AND, NAND, OR, NOR, XOR, shift).
The is a bit slice arithmetic logic unit (ALU), implemented as a 7400 series TTL integrated circuit. The first complete ALU on a single chip, it was used as  ‎ Specifications · ‎ Significance · ‎ Today · ‎ Computers.
The Grating Assembly is designed for installation into the Oriel Cornerstone 260 monochromators and imaging spectrographs. This 50 x 50 mm. 74181