6 layers338.8 × 107.2 mm

Inboard386
ronnyroy111/inboard386
Reverse engineered schematics, PCB and logic equations for the Intel 386/PC accelerator
199 parts16MIT
Boards in 1 GitHub repository, designed in KiCad, that use the 74F258ASJ by onsemi (0℃~+70℃ 24mA 3mA 4.5V~5.5V 74F 7ns@5V,50pF Reverse function、Output enable high-impedance、Tri-state output Single Supply SOIC-16-208mil Signal Switches, Multiplexers, Decoders). See how each wires it, with its parts, size, README and files; the 74F258ASJ’s symbol, footprint and pinout are on its own page.

ronnyroy111/inboard386
Reverse engineered schematics, PCB and logic equations for the Intel 386/PC accelerator