So here's where the next video stands. First, as I noted in a previous blog post, I've settled on an 8080-like MPU with 6 8-bit registers and an internal 8-bit bus. Now to make an internal 8-bit bus work, you nee a tri-state gate, a logic circuit which can be used to disconnect our logic... Continue Reading →

So one of my goals of my series "Introduction To Digital Computers" is to show the design of a computer that can be built entirely out of NPN transistors. The idea is that by showing the design of a digital computer from the absolute ground up--from something you can hold in your hands rather than... Continue Reading →