Crystalfontz 634 serial

Is the Crystalfontz 634 serial (v2.2) supported by mikrotik anymore? I’m trying it with 2.9.27 but all I get is garbage on the screen. Works fine in windows. I’ve tried multiple baud rates etc. I noticed there were some messages about issues with 2.9.20 but it said it was fixed in .21 (or something to that extent) I’ve also tried all the types, 16x2,4 20x2,4 24x2,4. It should be 20x4 but nothing works.

Thanks