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 74F280PC by onsemi (0.5V 0.8V 0℃~+70℃ 2.5V、2.7V 2V 4.5V~5.5V 74F 9 Odd parity generation、Simultaneous odd/even parity output、Even parity generation Parity Generator/Checker DIP-14 Parity Generators and Checkers ROHS). See how each wires it, with its parts, size, README and files; the 74F280PC’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