Based on https://github.com/JayesonLS/ISA-Cards IsaTemplate
39 x 34 + 10 (1336) hole 8-bit ISA prototype PCB. Designed to be cheap (size 99.5mm x 99.5mm) and have as many holes as possible.
It is also designed to have a 45-degree bevel at the connector. For JLCPCB, order with gold fingers enabled and a 45-degree bevel. Ready gerbers are available in output folder