Write M code

Hi！
I want to customize an M code, I read linuxcnc.org/docs/2.8/html/gcode/m-code.html#mcode:m70 , but I still don’t know how to write it.

Thanks in advance,
Chen1234

I don't really understand the question.

Do you want to customise M70? Or do you want to write a new M-code that uses M70?

Can we start at a higher level: What do you want the customised M-code to do?

I want to define a new M code through M100-M199 to realize the function of controlling the laser, but I don’t know how to write the M code

Please don't double post. You already opened a thread here:

forum.linuxcnc.org/20-g-code/42992-how-t...cognized-by-linuxcnc

I want to define a new M code through M100-M199 to realize the function of controlling the laser, but I don’t know how to write the M code

What does the M-code need to do? You keep asking the same question, but you are not giving us enough information to give an answer.

linuxcnc.org/docs/2.8/html/gcode/m-code.html#mcode:m100-m199

(Sorry, but only parts of the LinuxCNC documentation have been translated to Chinese. If you want to submit a translation of the G-code pages, that would be excellent)