Peter from Germany sent me an FS-UAE controller configuration for a retro SNES game pad. Since it identifies itself only as “USB Gamepad”, the config is not suitable for default distribution, but you can save the following configuration to (My) Documents/FS-UAE/Controllers/usb_gamepad.ini if you have this device.

[amiga]
axis_0_neg = left
axis_0_pos = right
axis_1_neg = up
axis_1_pos = down
button_2 = 1
button_3 = 2
button_1 = 1
button_0 = 2
button_4 = left
button_5 = right

[amigacd32]
axis_0_neg = left
axis_0_pos = right
axis_1_neg = up
axis_1_pos = down
button_2 = red
button_3 = green
button_0 = yellow
button_1 = blue
button_8 = select
button_9 = play
button_4 = rewind
button_5 = forward

[menu]
axis_0_neg = left
axis_0_pos = right
axis_1_neg = up
axis_1_pos = down
button_8 = menu
button_2 = primary
button_3 = secondary
button_1 = back
button_0 = tertiary
button_4 = up
button_5 = down
button_9 = play