I have 2 player joystick
Joystick (DragonRise Inc. Generic USB Joystick )

I have read everything i can but all point out to ps3 and xbox remote.
when i open the dreamcast the joystick works but not the buttoms

I configure the controller_generic.cfg

[emulator]
mapping_name = Generic Controller
btn_escape = 31

[dreamcast]
btn_a = 35
btn_b = 33
btn_c =
btn_d =
btn_x = 34
btn_y = 32
btn_z =
btn_start = 30
axis_x = =
axis_y = =
axis_trigger_left =
axis_trigger_right =

[compat]
btn_trigger_left = 36
btn_trigger_right = 37

THose are my buttons in hex value, i have done it with the actual buttons as well
like btn_escape = 1 ( my select key)

then i point on emu.cfg
evdev_mapping_1 = /opt/retropie/configs/dreamcast/mappings/controller_generic.cfg

nothing is working

Can someone point me in the right direction please
my controller are working on mame and final burn
its a joystick with 8 buttons

Thank you