Ok,
I will try.. i hope nothing happen.
I said becouse i remember in the 80´s and 90´s some friends has problems doing somethings in the Joysticks ports.. For example in the C64/128 its not recommendable conect a joystick with power on.
Anyway.. i will try
thanks.
If your splitter isn't just passing the 9 signals straight through and is connecting GND (pin
to +5V (pin 7) then perhaps you could damage things. Although, I did try that a few times on Atari 8-bit and it just reset the machine. Only when I plugged a 120VAC line into the joystick port's digital control line trying to control a light bulb did it fry that pin but the computer still worked.