Hello all,
I’m using a custom-built arcade game without any keyboard plugged in. The problem is, when using o2em emulator (Videopac / Odyssey 2), the emulator wait for keys “1” or “2” on the keyboard.
Is there a way, in retroarch.cfg, to simulate keyboard strokes with gamepad buttons ?
Thanks a lot,
Xavier.
Answer to myself: as a first solution, I modified the “libretro.c” file in the root directory of e2em git repository, and modified this: key[RETROK_1] = input_state_cb(0, RETRO_DEVICE_KEYBOARD, 0, RETROK_1); key[RETROK_2] = input_state_cb(0, RETRO_DEVICE_KEYBOARD, 0, RETROK_2); with this: key[RETROK_1] = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START); key[RETROK_2] = input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START); It’s ugly but at least it works, I can use START on the first pad to play first mode, and START on the second pad to play second mode.
As a more elegant solution, have you considered a keymapper like xpadder?
I use it to do all sorts of hotkeys.
Like if I hold Right-Stick-Click, and push the dpad around I can pause/play/skip/previous on winamp for music with pre-defined hotkeys.
I also do this for RetroArch in that I can hold Select and push up to save or down to load a state.
Oh that looks great.
I could use it to implement the load/save/whatever functions I couldn’t configure up to now!
Thanks a lot 
Hi,
Latest versions of libretro-o2em (>April 25th 2018) use X,Y,L,R to simulate keystrokes on 1,2,3,4.
Thomas
Great news, I can finally stop backporting this patch. Thanks
Its great to see little improvements to cores. I will have a little play with this tonight.
Side note has anyone ever emulated the original oddessy machine?