Int 21 Fn FF  UP - Rational Systems DOS/4gw - ???
 Int 21 Fn FF  UP - Rational Systems DOS/4gw - ???
 Int 21 Fn FF  UP - Rational Systems DOS/4gw - Get ??? Functions
 Int 21 Fn FF  UP - Rational Systems DOS/4gw - Get ???
 Int 21 Fn FF  UP - Rational Systems DOS/4gw - ???
 Int 21 Fn FF00  - Topware Network OS V5.10+ - Get System Information
 Int 21 Fn FF00  - Rational Systems DOS/4g - Installation Check
 Int 21 Fn FF04  - Topware Network OS V5.10+ - Get/set Default File Protectio
 Int 21 Fn FF0F  - Flu_shot+ V1.83 - Installation Check
 Int 21 Fn FF10  - Virus - "twins" - Installation Check
 Int 21 Fn FF80  - Topware Network OS V5.10+ - Send Message
 Int 21 Fn FF82  - Topware Network OS V5.10+ - Get Station Address
 Int 21 Fn FF8C  - Topware Network OS V5.10+ - Get Status Of Topshow/emulated
 Int 21 Fn FF8D  - Topware Network OS V5.10+ - Call Topshow Function
 Int 21 Fn FF8E  - Topware Network OS V5.10+ - Cancel Topshow Function
 Int 21 Fn FF91  - Topware Network OS V5.10+ - Get File Server Station Number
 Int 21 Fn FF97  - Topware Network OS V5.10+ - Get Maximum Station Number (se
 Int 21 Fn FF98  - Topware Network OS V5.10+ - Get Maximum File Number (serve
 Int 21 Fn FF9A  - Topware Network OS V5.10+ - Receive Of User-defined Packet
 Int 21 Fn FF9F  - Topware Network OS V5.10+ - Enable/disable Topterm Service
 Int 21 Fn FFB0  - Topware Network OS V5.10+ - Get Spooler Printing Priority
 Int 21 Fn FFB1  - Topware Network OS V5.10+ - Set Spooler Printing Priority
 Int 21 Fn FFB3  - Topware Network OS V5.10+ - Get Default Start-of-job Formf
 Int 21 Fn FFB4  - Topware Network OS V5.10+ - Set Default Start-of-job Formf
 Int 21 Fn FFBB  - Topware Network OS V5.10+ - Get Printer Server Station Add
 Int 21 Fn FFBC  - Topware Network OS V5.10+ - Cancel Topshow Function
 Int 21 Fn FFBD  - Topware Network OS V5.10+ - Get Current Autoprint Time
 Int 21 Fn FFBE  - Topware Network OS V5.10+ - Set Autoprint Time
 Int 21 Fn FFBF  - Topware Network OS V5.10+ - Get Logon User Information
 Int 21 Fn FFC0  - Topware Network OS V5.10+ - Get Default End-of-job Formfee
 Int 21 Fn FFC1  - Topware Network OS V5.10+ - Set Default End-of-job Formfee
 Int 21 Fn FFC2  - Topware Network OS V5.10+ - Get Default Copies Of Spooling
 Int 21 Fn FFC3  - Topware Network OS V5.10+ - Get Sharing Status Of Printer
 Int 21 Fn FFC4  - Topware Network OS V5.10+ - Get/set Lpt Port On Print Serv
 Int 21 Fn FFC6  - Topware Network OS V5.10+ - Set Default Print File Header
 Int 21 Fn FFC7  - Topware Network OS V5.10+ - Set Default Print Copies
 Int 21 Fn FFC8  - Topware Network OS V5.10+ - Get Default Print File Header
 Int 21 Fn FFC9  - Topware Network OS V5.10+ - Set Printer Sharing
 Int 21 Fn FFCA  - Topware Network OS V5.10+ - Move File From One Print Serve
 Int 21 Fn FFCB  - Topware Network OS V5.10+ - Delete File From Spooling Queu
 Int 21 Fn FFCC  - Topware Network OS V5.10+ - Get Print Server's Spooling Qu
 Int 21 Fn FFCD  - Topware Network OS V5.10+ - Get Status Of All Print Server
 Int 21 Fn FFCF  - Topware Network OS V5.10+ - Call Toplook Function
 Int 21 Fn FFD6  - Topware Network OS V5.10+ - Get Keycard Serial Number And
 Int 21 Fn FFD7  - Topware Network OS V5.10+ - Get Network Protection Attribu
 Int 21 Fn FFE3  - Topware Network OS V5.10+ - Initiate Access To Specific Pa
 Int 21 Fn FFE3  - Topware Network OS V5.10+ - End Access To Specific Packet
 Int 21 Fn FFE3  - Topware Network OS V5.10+ - Send Packet
 Int 21 Fn FFE3  - Topware Network OS V5.10+ - Get Local Network Interface Ad
 Int 21 Fn FFFE  - Virus - "08/15"/"many Fingers" - Installation Check
 Int 21 Fn FFFF  - Virus - "ontario", "year 1992"/"b1m92" - Installation Chec
 Int 21 Fn FFFF  - Virus - "revenge" - Installation Check