Functional 16-bit CPU built and runs in Excel, 3Hz processor includes 128KB of RAM, 16-color display, and a custom assembly language

Never underestimate what you can do in excel.

A hobbyist has created a 16-bit CPU that was built and runs inside Excel at a 3Hz clock rate and has 128KB of RAM, a 16-color 128x128 pixel display, and a custom assembly language that all runs in the popular spreadsheet. In fact, you can even try out the CPU with files the creator has made available via Github.