| M0-M1 | Unconditional stop |
| M3 | Spindle on, CW |
| M4 | Spindle on, CCW |
| M5 | Spindle stop |
| M7 | Coolant - Mist |
| M9 | Coolant off |
| M12 | Coolant air |
| M20 | List SD card |
| M21 | Initialise SD card |
| M22 | Release SD card |
| M23 | Select SD file |
| M24 | Start or resume SD program |
| M25 | Pause SD program |
| M26 | Set SD position |
| M27 | Report SD program status |
| M28 | Start SD write |
| M29 | Stop SD write |
| M30 | Delete SD file |
| M31 | Program time |
| M32 | Select and start |
| M33 | Get long path |
| M34 | SD card sorting |
| M92 | Set Axis Steps-Per-Unit |
| M111 | Set Debug Level; (S1) Echo, (S2) Info, (S4) Errors, (S128) VFD Commmunication Debug |
| M115 | Read Firmware Version |
| M119 | Retrieve endstop status |
| M120 | Enable Hardware Endstops |
| M121 | Disable Hardware Endstops |
| M211 | Software Endstops (Soft Limits) toggle with S0 or S1 |
| M500 | Save Settings |
| M503 | Retrieve Hardware Settings |
| M997 | Restart into firmware update mode. This will open a USB drive and wait for you to copy and paste the new firmware file into the drive. See here for SwordFish firmware. |