216300 INT 21 - DOS 2.25 only - GET LEAD BYTE TABLE ADDRESS
216300 INT 21 - DOS 3.2+ - GET DOUBLE BYTE CHARACTER SET LEAD-BYTE TABLE
216301 INT 21 - DOS 2.25, DOS 3.2+ - SET KOREAN (HANGEUL) INPUT MODE
216302 INT 21 - DOS 2.25, DOS 3.2+ - GET KOREAN (HANGEUL) INPUT MODE
216303 INT 21 - VIRUS - "DOS IDLE" - INSTALLATION CHECK
216304 INT 21 - VIRUS - "Replicator" - INSTALLATION CHECK