There's the great nand2tetris course [1] - teaches step by step how to build a computer from the simplest logical gates, using hdl, to building your own ALU, co

There's the great nand2tetris course [1] - teaches step by step how to build a computer from the simplest logical gates, using hdl, to building your own ALU, computer, and later on operating system, etc'. [1] https://www.nand2tetris.org/ https://www.nand2tetris.org/