NOR, XOR and XNOR). Electronic gates operate on two nominal voltages, normally 0 V and 5 V, representing the logic 0 and the logic 1, respectively. The AND gate has two inputs A and B.

It’s a surprise then to find that a working CPU can be made with just a single NOR gate — which is what is at the heart of [Dennis Kuschel]’s My4th single board discrete logic computer.

In addition to basic complete logic functionality such as NOR or NAND gates, the first four requirements below are essential for any logic device 20. Cascadability. The output of one stage must be ...

1 NAND inverting gate and AND non-inverting gate Standard CMOS gates used in IC design are ... when the inversion can be optimized away in the logic by using an inverting logic function such as NAND, ...