Mach 3 ports and pins problems,

[JAZZCNC]

i can't figure out how to disable any movements in xyz until this switch is made, I can connect it to the inputs ok and see the switch working on diagnostic but what in Mach needs settings for this to work?
does anyone have experience of this?
thanks,

Do you mean you want to Halt XYZ from Homing until A axis finished Homing.?

If so then this is very easy all you need to do is change the Homing script. By default Mach starts with Z then Y then X then A.
To change then goto Operator menu and choose Edit Button Script. On the Screen the Ref All Home button will flash. Click on it and it will open the script editor.
Now move the line that says "DoButton( 25 )" to the top of the list. The sequence will then be A, Z, Y, X. The other axis won't move until the A axis finish.