M756 & other documentation

[cgriffin]

What does M756 do? Does it override the flash layer height setting?

Can we get a list of all g-code and M commands? I know most are general, but M756 is nowhere else online, and I'm sure it is not the only one.

Thanks.

[Davo]

M756 Sxxx sets the layer thickness (for flow calculation purposes) to xxx.

The value stored on the head is always overwritten by the gcode, but we need a non-xero value until the gcode is source in (which is after the head data).

The new release should have a more complete gcode/mcode dictionary.