The JC65 PCB actually has two revisions: A QMK native version, and a PS2AVRGB version. Jchan offered both PCBs as options during the M65-A Round 1 group buy, and were also available choices for the 65% acrylic case group buy.
See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.