21E1 INT 21 - OS/286, OS/386 - ISSUE REAL PROCEDURE CALL
21E1 INT 21 - DoubleDOS - CLEAR KEYBOARD BUFFER FOR CURRENT JOB
21E1 INT 21 - VIRUS - "Mendoza", "Fu Manchu" - INSTALLATION CHECK
21E1--SF00 INT 21 - Novell NetWare - MESSAGE SERVICES - SEND BROADCAST MESSAGE
21E1--SF01 INT 21 - Novell NetWare - MESSAGE SERVICES - GET BROADCAST MESSAGE (OLD)
21E1--SF02 INT 21 - Novell NetWare - MESSAGE SERVICES - DISABLE BROADCAST MESSAGES
21E1--SF03 INT 21 - Novell NetWare - MESSAGE SERVICES - ENABLE BROADCAST MESSAGES
21E1--SF04 INT 21 O - Novell NetWare - MESSAGE SERVICES - SEND PERSONAL MESSAGE
21E1--SF05 INT 21 O - Novell NetWare - MESSAGE SERVICES - GET PERSONAL MESSAGE
21E1--SF06 INT 21 O - Novell NetWare - MESSAGE SERVICES - OPEN MESSAGE PIPE
21E1--SF07 INT 21 O - Novell NetWare - MESSAGE SERVICES - CLOSE MESSAGE PIPE
21E1--SF08 INT 21 O - Novell NetWare - MESSAGE SERVICES - CHECK PIPE STATUS
21E1--SF09 INT 21 - Novell NetWare - MESSAGE SERVICES - BROADCAST TO CONSOLE