HelenOS sources
KC_N9 135 uspace/drv/hid/adb-kbd/ctl.c [0x5c] = KC_N9,
KC_N9 152 uspace/drv/hid/atkbd/atkbd.c [0x7d] = KC_N9,
KC_N9 147 uspace/drv/hid/usbhid/kbd/conv.c [0x61] = KC_N9,
KC_N9 145 uspace/drv/hid/xtkbd/xtkbd.c [0x49] = KC_N9,
KC_N9 168 uspace/srv/hid/input/ctl/sun.c [0x46] = KC_N9,
KC_N9 186 uspace/srv/hid/input/layout/ar.c [KC_N9] = '9',
KC_N9 215 uspace/srv/hid/input/layout/cz.c [KC_N9] = '9',
KC_N9 194 uspace/srv/hid/input/layout/fr_azerty.c [KC_N9] = '9',
KC_N9 195 uspace/srv/hid/input/layout/us_dvorak.c [KC_N9] = '9',
KC_N9 189 uspace/srv/hid/input/layout/us_qwerty.c [KC_N9] = '9',
HelenOS homepage, sources at GitHub