Just search "my ben eater" on YouTube and you'll find many other people following his steps and making their own computers; some even going as far as to improve upon the original. It's really quite awesome to see.
Hats off to Ben. His succinct videos have done much more for my understanding of low level computing than any computer science professor I've had -- and all through only video.
http://www.nand2tetris.org/ is the website for it.
Right now it has PS/2 keyboard input, and a 40x2 character display output.
The biggest help was his sensible clock design. I modified it a bit in my design, but the techniques he demonstrates in his videos are incredibly helpful and provide a good base to build off of.
I mean that as a compliment of the highest order. That project is brilliant.
Somewhat surprised that you can still buy LS TTL. I'd have thought it'd be replaced by some 1.5V supply ultraBiCMOSwhatever by now. Or a single die that you program to be whatever last-century TTL function you want, via its WiFi interface...
Time was I has the entire 74xxx series memorized. Long since paged out to make way for more important stuff in my brain.
Early TTL is still used for building oscillators, timing circuits and monostables because lots of long run products were designed with those in and the LS/HC parts aren't equivalent due to bias current etc.
A Replica 1 is an Apple 1 clone made with permission from Steve Wozniak that people can build from a kit. It is an 8 bit microcomputer with Apple Integer BASIC and optional casette tape interface.
The PDF is also there if you do not want to install kicad
He even goes so far as to mention it and shows a copy of the book in his first video:
I stumbled across the book 4 years ago when I followed this instructable:
The instructable is nowhere near as detailed as Ben's videos, but it was all I had at the time, and it recommended that book. Note: when I purchased the book 4 years ago, it was only $5, now I'm seeing it for upwards of $99:
The paperback is only $22, but it lists an additional author not present on the 1977 version, so I don't know if it's the exact same book.
For example, he sometimes goes a bit too much into basics such as ones' complement vs two's complement for me, but that's in separate videos, so you can easily skip that.
Add some nixie tubes, and you have a steampunk wet dream.
Find ye parts: