This is the keymap for rev2 of the Atom47. Only 9 of those have been sold for testing purposes. It had a slightly misaligned usb port and the pcb was too thick (should've been 1.2mm instead of 1.6mm). The pcb only supports the default hardware layout, although /u/ChrisSwires has [modified his](https://www.reddit.com/r/MechanicalKeyboards/comments/7n2dua/not_your_average_core_with_honeywell/) and put a big spacebar in it.
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.