20211205 Mystery MX - jsheradin/kb_adventures GitHub Wiki

By far the most heavily used board I've seen. It features MX black switches and some very, very worn doubleshot ABS caps. There was a minor amount of corrosion on the PCB which was able to be repaired and recoated. Amazingly, even though the caps are nearly worn through, all the switches still worked perfectly fine even before cleaning them. When Cherry claims a switch is good for 50,000,000 presses I think they actually mean it.

The board speaks standard AT but the matrix is a bit interesting. The CTRL and ALT keys are both wired in parallel so they both fire LCTRL/LALT respectively. The extra keys on top are not mapped to function key codes but rather the unused RCTRL/RALT codes along with LGUI and a language key.