21FF INT 21 - DOS v2.11-2.13 - OEM FUNCTION
21FF INT 21 - CED (Command EDitor) - INSTALLABLE COMMANDS
21FF INT 21 - DJ GO32.EXE 80386+ DOS extender - DOS EXTENSIONS
21FF INT 21 - DOSED.COM - INSTALLATION CHECK
21FF INT 21 - VIRUS - "Sunday", "Tumen 0.5", "Hero" - INSTALLATION CHECK
21FF INT 21 UP - Rational Systems DOS/4GW - API
21FF--DH00 INT 21 UP - Rational Systems DOS/4GW - GET VERSION???
21FF--DH02 INT 21 UP - Rational Systems DOS/4GW - SET ???
21FF--DH05 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH06 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH07 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH08 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH09 INT 21 UP - Rational Systems DOS/4GW - GET ???
21FF--DH0A INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH0B INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH0C INT 21 UP - Rational Systems DOS/4GW - GET/SET ???
21FF--DH0D INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH0E INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH0F INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH10 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH11 INT 21 UP - Rational Systems DOS/4GW - NOP
21FF--DH12 INT 21 UP - Rational Systems DOS/4GW - EXCHANGE ??? POINTERS
21FF--DH13 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH14 INT 21 UP - Rational Systems DOS/4GW - ???
21FF--DH15 INT 21 UP - Rational Systems DOS/4GW - GET ??? FUNCTIONS
21FF--DH16 INT 21 UP - Rational Systems DOS/4GW - GET ???
21FF--DH17 INT 21 UP - Rational Systems DOS/4GW - ???
21FF00 INT 21 - TopWare Network OS v5.10+ - GET SYSTEM INFORMATION
21FF00DX0078 INT 21 - Rational Systems DOS/4G - INSTALLATION CHECK
21FF01 INT 21 - VIRUS - "Drop" - INSTALLATION CHECK
21FF04 INT 21 - TopWare Network OS v5.10+ - GET/SET DEFAULT FILE PROTECTION ATTRIBS
21FF0F INT 21 - FLU_SHOT+ v1.83 - INSTALLATION CHECK
21FF10 INT 21 - VIRUS - "Twins" - INSTALLATION CHECK
21FF80DHFF INT 21 - TopWare Network OS v5.10+ - SEND MESSAGE
21FF82 INT 21 - TopWare Network OS v5.10+ - GET STATION ADDRESS
21FF8C INT 21 - TopWare Network OS v5.10+ - GET STATUS OF TopShow/Emulated FUNCTION
21FF8D INT 21 - TopWare Network OS v5.10+ - CALL TopShow FUNCTION
21FF8E INT 21 - TopWare Network OS v5.10+ - CANCEL TopShow FUNCTION
21FF91 INT 21 - TopWare Network OS v5.10+ - GET FILE SERVER STATION NUMBER
21FF97 INT 21 - TopWare Network OS v5.10+ - GET MAXIMUM STATION NUMBER (server only)
21FF98 INT 21 - TopWare Network OS v5.10+ - GET MAXIMUM FILE NUMBER (server only)
21FF9A INT 21 - TopWare Network OS v5.10+ - RECEIVE OF USER-DEFINED PACKETS
21FF9F INT 21 - TopWare Network OS v5.10+ - ENABLE/DISABLE TopTerm SERVICE
21FFB0 INT 21 - TopWare Network OS v5.10+ - GET SPOOLER PRINTING PRIORITY
21FFB1 INT 21 - TopWare Network OS v5.10+ - SET SPOOLER PRINTING PRIORITY
21FFB3 INT 21 - TopWare Network OS v5.10+ - GET DEFAULT START-OF-JOB FORMFEED STATUS
21FFB4 INT 21 - TopWare Network OS v5.10+ - SET DEFAULT START-OF-JOB FORMFEED STATUS
21FFBB INT 21 - TopWare Network OS v5.10+ - GET PRINTER SERVER STATION ADDRESS
21FFBC INT 21 - TopWare Network OS v5.10+ - CANCEL TopShow FUNCTION
21FFBD INT 21 - TopWare Network OS v5.10+ - GET CURRENT AUTOPRINT TIME
21FFBE INT 21 - TopWare Network OS v5.10+ - SET AUTOPRINT TIME
21FFBF INT 21 - TopWare Network OS v5.10+ - GET LOGON USER INFORMATION
21FFC0 INT 21 - TopWare Network OS v5.10+ - GET DEFAULT END-OF-JOB FORMFEED STATUS
21FFC1 INT 21 - TopWare Network OS v5.10+ - SET DEFAULT END-OF-JOB FORMFEED STATUS
21FFC2 INT 21 - TopWare Network OS v5.10+ - GET DEFAULT COPIES OF SPOOLING FILE
21FFC3 INT 21 - TopWare Network OS v5.10+ - GET SHARING STATUS OF PRINTER SERVER
21FFC4 INT 21 - TopWare Network OS v5.10+ - GET/SET LPT PORT ON PRINT SERVER
21FFC6 INT 21 - TopWare Network OS v5.10+ - SET DEFAULT PRINT FILE HEADER
21FFC7 INT 21 - TopWare Network OS v5.10+ - SET DEFAULT PRINT COPIES
21FFC8 INT 21 - TopWare Network OS v5.10+ - GET DEFAULT PRINT FILE HEADER STATUS
21FFC9 INT 21 - TopWare Network OS v5.10+ - SET PRINTER SHARING
21FFCA INT 21 - TopWare Network OS v5.10+ - MOVE FILE FROM ONE PRINT SERVER TO ANOTHER
21FFCB INT 21 - TopWare Network OS v5.10+ - DELETE FILE FROM SPOOLING QUEUE
21FFCC INT 21 - TopWare Network OS v5.10+ - GET PRINT SERVER'S SPOOLING QUEUE STATUS
21FFCD INT 21 - TopWare Network OS v5.10+ - GET STATUS OF ALL PRINT SERVERS
21FFCF INT 21 - TopWare Network OS v5.10+ - CALL TopLook FUNCTION
21FFD6 INT 21 - TopWare Network OS v5.10+ - GET KEYCARD SERIAL NUMBER AND MAX USERS
21FFD7 INT 21 - TopWare Network OS v5.10+ - GET NETWORK PROTECTION ATTRIBUTES STATUS
21FFE3DL00 INT 21 - TopWare Network OS v5.10+ - INITIATE ACCESS TO SPECIFIC PACKET TYPE
21FFE3DL01 INT 21 - TopWare Network OS v5.10+ - END ACCESS TO SPECIFIC PACKET TYPE
21FFE3DL02 INT 21 - TopWare Network OS v5.10+ - SEND PACKET
21FFE3DL03 INT 21 - TopWare Network OS v5.10+ - GET LOCAL NETWORK INTERFACE ADDRESS
21FFFE INT 21 - VIRUS - "08/15"/"Many Fingers" - INSTALLATION CHECK
21FFFEBX0000 INT 21 - VIRUS - "Anti-Thunderbyte/LEMMING" - INSTALLATION CHECK
21FFFF INT 21 - VIRUS - "Ontario", "Year 1992"/"B1M92" - INSTALLATION CHECK
21FFFFCX0000 INT 21 - VIRUS - "Revenge" - INSTALLATION CHECK