Control panel, MUX wiring help

Hi there. I've this old bosch panel but no idea how to connect this to MESA7i77. No ideia how to MUX wiring this.



Panel routing layout as follows:



So, looking at this, do i need to use a MUX chips to wire against 7i77? Something like this?



I'm searching some info, pic's or drawings about this subject, to compare and aply, i'm having some dificults here... not so skilled on electronics.

You could scan that directly from the 7I77 if you can afford to spare
8 outputs and 5 inputs (assuming the schematic is correct and there are no
electronic parts other than the diodes)

Yes, only diodes inside.
I've multimeter checked and each push button is just closing the loop between Scan# and Data#.

Only inputs/outputs i spend were to limit switches and emergency so, free to do this :woohoo:

So, direct wiring 8 outputs(data#) and 5 inputs(scan#) to 7i77? What kind of code do i need to inplement this on hal config?

I was afraid you would ask...

I think the matrix_kb component would do most of the work
but it will be a fair amount of hal plumbing

After read some posts about matrix_kb, no chance to me.
Is there any other simplier options to reuse this old panel? Multiple mux components? or just create a sized simplier panel with direct push buttons to inputs?

I don't want all the fancier jigs on this machine, if possible reuse things, if not, keep it simple.

Well another solution would be to write your own component that turned those inputs and outputs into meaningful stuff. It would reduce the hal plumbing, but probably not make it much easier if you don't understand C