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 2 GitHub repositories, designed in KiCad, that use the 74F161APC by onsemi (0℃~+70℃ 1 120MHz 4.5V~5.5V Asynchronous Divide-by-2 Rising Edge Synchronous Up Counter PDIP-16 Counters, Dividers ROHS). See how each wires it, with its parts, size, README and files; the 74F161APC’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

dbalsom/pxl-380
A reverse-engineering of the FTG PXL-380 Light Pen Interface Card