Function inputdevice_compa_prepare_custom

src/inputdevice.cpp:7431–7446

prepare port for custom mapping, remove all current Amiga side device mappings

// prepare port for custom mapping, remove all current Amiga side device mappings
void inputdevice_compa_prepare_custom (struct uae_prefs *prefs, int index, int newmode, bool removeold)
{
	int mode = prefs->jports[index].mode;
	if (newmode >= 0) {
		mode = newmode;
	} else if (mode == 0) {
		mode = index == 0 ? JSEM_MODE_WHEELMOUSE : (prefs->cs_cd32cd ? JSEM_MODE_JOYSTICK_CD32 : JSEM_MODE_JOYSTICK);
	}
	prefs->jports[index].mode = mode;

	if (removeold) {
		prefs->jports_custom[JSEM_GETCUSTOMIDX(index, prefs)].custom[0] = 0;
		remove_compa_config (prefs, index);
		remove_custom_config (prefs, index);
	}
}
// clear device before switching to new one
void inputdevice_compa_clear (struct uae_prefs *prefs, int index)
{