LIBROM Function and direct address:

LIBROM_PD_RETURN    (0X4000)
LIBROM_LOOP_RETURN  (0X4020)
LIBROM_DELAY_10US   (0X4040)
LIBROM_DELAY_50US   (0X4060)
LIBROM_DELAY_100US  (0X40A0)
LIBROM_DELAY_1MS    (0X40E0)
LIBROM_DELAY_10MS   (0X4120)
LIBROM_DELAY_100MS  (0X4160)
