How to configure USB Joystick for MAme4All frontend?

[Marconi]

I have got most things up and running with a Raspberry PI and a USB joystick controller for making my own cabinet, but,

Only one thing left, I want to be able to select games using the "built in" frontend of Mame4all. I have searched everywhere but cannot find the syntax of the J_ entries in the mame.cfg file. It reads like this, and by changing J_A=0 to any other number 0-9 I can get any of my keys or joystick movements to start a highlighted game.

Buy, what is the syntax for moving up and down in the menu? I would have guessed J_UP and J_DOWN, but this is not the case...

Strange that the syntax is not explained anywhere, it probably is, but I cant find it. Anyone that can help? I know there are other frontends, but I prefer to configure this one.

#Joystick controls for frontend only
J_START=7
J_SELECT=6
J_A=0
AXIS_LR=0
AXIS_UD=1

[ark_ader]

I have got most things up and running with a Raspberry PI and a USB joystick controller for making my own cabinet, but,

Only one thing left, I want to be able to select games using the "built in" frontend of Mame4all. I have searched everywhere but cannot find the syntax of the J_ entries in the mame.cfg file. It reads like this, and by changing J_A=0 to any other number 0-9 I can get any of my keys or joystick movements to start a highlighted game.

Buy, what is the syntax for moving up and down in the menu? I would have guessed J_UP and J_DOWN, but this is not the case...

Strange that the syntax is not explained anywhere, it probably is, but I cant find it. Anyone that can help? I know there are other frontends, but I prefer to configure this one.

#Joystick controls for frontend only
J_START=7
J_SELECT=6
J_A=0
AXIS_LR=0
AXIS_UD=1

How does the Joystick respond when you use Retropie?