I am explaining my Minimal 64x4 DIY home computer on microcode level and write an emulator for it in JavaScript. Enjoy! Emulator w/o PS/2 and UART: https://editor.p5js.org/slu4coder/sketches/1fljnu-Y7 Full emulator in JavaScript: https://editor.p5js.org/slu4coder/sketches/lRq1gyYR2 Minimal 64x4 reference manual: https://docs.google.com/document/d/1-nDv_8WEG1FrlO3kEK0icoYo-Z-jlhpCMiCstxGOCjQ/edit?usp=sharing Minimal 64x4 OS, software, KiCAD project, Gerber PCB files: https://github.com/slu4coder/Minimal-64x4-Home-Computer