MOUSE_MSC_BUTTONS
buttons_out = MOUSE_MSC_BUTTONS;
buf[0] |= (~buttons) & MOUSE_MSC_BUTTONS;
buttons_out = MOUSE_MSC_BUTTONS;
act->button = butmapmsc[(~pBuf[0]) & MOUSE_MSC_BUTTONS];
act->button = butmapmsc[pBuf[0] & MOUSE_MSC_BUTTONS];