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Turned out to be not too difficult, adds an entry 'show_startup_message' in the .pref file:  
 

Yes, this is a useful feature, thanks!

thanks for the fast response PCW!

for my understanding!?
1)flashing the firmware to the fpga using the infinty software and the ftdi4232 jtag interface.
am i flashing to the fpga ram (Volatile Memory)? after power loss, the firmware is gone right?

2)write the firmware to the fallback and the eeprom (is it a part of the fpga? or is it an external eeprom on the 7i95t?)

mesaflash --device 7I95T --fallback --write FPGAFILE.BIN
mesaflash --device 7I95T --write FPGAFILE.BIN

after writing the .bin file it should be permanently saved to the storage and the 7i95t should work porperly again after power loss?

the ftdi4232 mini should be deliverd on friday, i'll give it some trail and error then

Two moments:
1. My target is B series Fanuc.
2. How to control with new protocol? Mesa? Connected to original Fanuc adater?

/eugenius

And what does it matter?
if you still have a problem, upload the configuration files. Most likely something wrong with them.

Unfortunately the VFD is a special construction from Paulimot (Paulimot F207-V). I have to take a closer look insight the machine if it is possible to use ferrite beads.

Propably for better understanding I added the wiring diagram of my relays:

 

Yellow marked are the contacts that are provided by the Mesa 7i76. The TB6_OUT_Pin03 switches +12V when spindle is activated in LinuxCNC.

I made 2 tests: 
- When disconnecting Pin03 and using 12V directly from power supply, there is no problem with the mouse.
- When using Pin03 (activated) and then stopping the spindle with stop switch (in the middle) the mouse is also Ok.

On the left side the 2 red cables at the bottom are connected with the internal VFD.

I already ordered a SSR and will test it the next days. And I will have a look inside the VFD.