6 layers313 × 259.5 mm

Open8-vga motherboard
adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.
322 parts3MIT
Boards in 1 GitHub repository, designed in KiCad, that use the CD74HC157E by Texas Instruments (-55℃~+125℃ 2V~6V 32ns@6V,50pF 5.2mA 5.2mA 74HC 8uA Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHS). See how each wires it, with its parts, size, README and files; the CD74HC157E’s symbol, footprint and pinout are on its own page.

adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.