Setting up Lathe and Mill Axis Pins

I just purchased a Sherline lathe and I'm planning out the rebuild of the driver box.

Is it possible to have EMC output the Mill Axis (X,Y,Z,A) on
one set of pins, and the Lathe Axis (X,Z)on another set.
(This would make that I do not need to install a switch)

Something like (I realize the pins are not right)

Mill

2 - X direction
3 - X step
4 - Y direction
5 - Y step
6 - Z direction
7 - Z step
8 - A direction
9 - A step

Lathe
10 - X direction
11 - X step
12 - Z direction
13 - Z step

I realize I cannot run the Mill and Lathe at the same time.

This is mostly so I do not need to install a switch (forthe X & Z axis)
and to avoid having the input to the driver boards left floating.

Thank you

I have a Separate Mill (4 axis) and a Separate Lathe (2 axis)

I also have 2 separate driver boards one for the Lathe and one for the Mill.

My thoughts were to run 1 cable from the computer to the "driver Box"

The driver box would have two power switches: 1 for the Mill and 1 for the Lathe.

The thought was that by having the pins on both always connected.

I would never have a case of a driver being switched on and nothing
on the input since I have found when you do that the Axis tend to grind.

I can put in a switch to switch the X and Z lines if it is needed,
but it would be cleaner if it was not.

I'd rather not run two PC's either since I highly doubt I would
be doing two jobs at once enough to make it worth it.

Basically it is a way to save me from myself

Thank you

I may need to add a I/O card to get enough lines