[Dr_Jefyll]

>The MC14500B has an unusual architecture, making it more of a building block than a complete microprocessor. [... It] requires multiple external chips to make it usable.

Love the articles you've been posting, Ken! And yes the MC14500 requires multiple external chips to make it usable. In fact, HNers may recall the one-bit machine whose chip-count I optimized by eliminating the MC14500B itself!

One-Bit Computing at 60 Hertz https://news.ycombinator.com/item?id=20565779