Using A axis driver pin out as C axis in grbl-mega-5x and mks gen-l v1.0 control board

Hi guys,
I'm building a new desktop 5axes cnc milling machine and i'm using an mks genl v1.0 board and grbl-mega-5x firmware, it's architecture is X ,Z and B (rotation over X axis)axes for the head ,Yand C(rotation over Z axis)axes for the table , i want to use the driver of A axis (E0 in mks genl v1) for the C axis ,is there any possibility to configure the firmware and replace the pins.
I've attached the pin mapping of the mks genl v1 have a look.
Thanks,

Edited 2 time(s). Last edit at 05/16/2025 03:16AM by Houari-31.