This project has been tested and works for the Commodore C64. I'm using the adapter in my project instead of the faulty 901227-3 (Kernal ROM) and 901225-01 (Character ROM) on my own Commodore C64.

901227-3 (Kernal ROM) is the 2364 ROM, and 901225-01 (Character ROM) is the 2332 ROM. I copied the original ROMs for my C64 from "https://zimmers.net/anonftp/pub/cbm/firmware/computers/c64/index.html". Since the 2364 ROM images are 8 KB, they can be written directly to the 27C64. Since the 2332 ROM images are 4 KB, they can be doubled in size with the Copy /b command in a DOS environment and written to the 27C64.

I tested this project for Commodore C64, but I hope you can use it for all your old retro devices. Test and use at your own risk.

Note: It would be better to select Thickness: 1 mm on the PCB production page.