4 layers101.6 × 53.3 mm

Xc2064-mega shield
swittlich/prjfreeman
Open-source flow (yosys + nextpnr) and bitstream documentation for the XC2064, the first FPGA
80 partsISC
Boards in 1 GitHub repository, designed in KiCad, that use the X49SD4MSD2SC by YXC (-20℃~+70℃ 120Ω 20pF 4MHz Through Hole Crystal Oscillator ±20ppm ±30ppm HC-49S Crystals ROHS). See how each wires it, with its parts, size, README and files; the X49SD4MSD2SC’s symbol, footprint and pinout are on its own page.

swittlich/prjfreeman
Open-source flow (yosys + nextpnr) and bitstream documentation for the XC2064, the first FPGA