Big thank you to @thejollygrimreaper, who managed to get CoreXY support into Teacup firmware. It's on the
corexy branch for now. Seems to work pretty well.
Teacup firmware is one of RepRap oldest firmwares (even a bit older than Sprinter), receives continued development and works on many ATmega and ARM based RepRap controllers. Due to its emphasis on avoiding redundant features it's small, accurate and very fast. See [
reprap.org]
