Homebrew 4-bit processor

Viktor, a software engineer by profession, has successfully designed and built his very own 4-bit computer from a bunch of low-level electronic components that comprise mainly of TTL logic gates. When compared against a modern Pentium system (not necessarily the latest chip), it probably offers approximately 0.1% of the speed and 0.000001% of memory. Granted, you can’t even play a round of the classic Super Mario Bros with this solution, but it is a labor of love that ultimately makes us all soft and mushy inside.