Multiple tools on the CNC

The machine is still working now with an old NC481 controller.
There are a few problems, and a whole lot of limitations.
Therefore I'm preparing a retrofit.
I'll use Mesa 5i25 and 7i77, but first I need to know if all is possible before I take the NC481 down and replace

I was able to identify most of the electrical cables, so the next step is the connection of the servo's to the 7i77 and after this building up the rest of the logic.

So to answer, no, I'll not use the parallel port interface. It will be the 7i77.

Do you ever need to use more than one of the tools at the same time? The above example won't do that. But doing it with another interface like Mesa hardware instead of the parallel port example is simply changing the hal pin names for the outputs.

At this moment I use several tools at the same time.
But that is not really needed in the future.
This is currently used to drill wholes of the same diameter in a row (32mm or 64mm separated).

You could use custom m code(s) to call down multiple or additional tools.

Ok M codes I'll look at this.

But the goal is to use Fusion 360 and the LinuxCNC postprocessor.
This will not generate M codes i think.

Custom m codes isn't the only way this can be done. There was a discussion here a few weeks ago that talked about multiple ways to do this.

Pretty sure the posts for Fusion are customizable.

Does your machine only have a multi spindle drilling head or does it also have a router head(s) with or without a tool changer as well?

The machine has a spindle head with with 16 drills and one saw. All of these are starting the same time. But they can individually pushed down by a pneumatic cilinder. There's another router (separate spindle motor) without a tool changer. This router is must also pushed down by a pneumatic cylinder.
In the control cabinet, all these pneumatic cilinders are currently connected to an output on the NC481 (numerical control unit and build-in PLC)