The micro-controller holds a cache, with 8 bit processor. You could write assembly language code and brush up on your boolean algebra at the same time. This chip would cost allot more brand new, and now it's a necklace.
The ZX-80 was widely advertised as the first personal computer for under US$200 32K EPROM INTEL 44 CLCC. Pins on this chip are 14k Gold plated for solid socket connections.