Int 6B  - Decnet DOS - Port Driver
 Int 6B  - Virus - "saddam" - Original Int 21h Vector
 Int 6B Fn 0000  - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - Buff
 Int 6B Fn 0100  - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - Buff
 Int 6B Fn 02  - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - Instal
 Int 6B Fn 0600  - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - Cont
 Int 6B Fn 0700  - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - Get
 Int 6B Fn 08  - Telapi - ???
 Int 6B Fn 10  - Npc Ncsi Extended Serial I/o - Get Status
 Int 6B Fn 11  - Npc Ncsi Extended Serial I/o - Allocate A Virtual Circuit
 Int 6B Fn 12  - Npc Ncsi Extended Serial I/o - Virtual Circuit Status
 Int 6B Fn 13  - Npc Ncsi Extended Serial I/o - Set/retrieve Request/reply Se
 Int 6B Fn 14  - Npc Ncsi Extended Serial I/o - Set/retrieve Service Address
 Int 6B Fn 15  - Npc Ncsi Extended Serial I/o - Set/retrieve Virtual Circuit
 Int 6B Fn 16  - Npc Ncsi Extended Serial I/o - Log And/or Initialize Virtual
 Int 6B Fn 17  - Npc Ncsi Extended Serial I/o - Disconnect A Virtual Circuit
 Int 6B Fn 18  - Npc Ncsi Extended Serial I/o - Write Data On A Virtual Circu
 Int 6B Fn 19  - Npc Ncsi Extended Serial I/o - Read Data On A Virtual Circui
 Int 6B Fn 1A  - Npc Ncsi Extended Serial I/o - Receive Status
 Int 6B Fn 1B  - Npc Ncsi Extended Serial I/o - Transmit Status
 Int 6B Fn 1C  - Npc Ncsi Extended Serial I/o - Receive Buffer Control
 Int 6B Fn 1D  - Npc Ncsi Extended Serial I/o - Transmit Buffer Control
 Int 6B Fn 1E  - Npc Ncsi Extended Serial I/o - Issue Control Request
 Int 6B Fn 1F  - Npc Ncsi Extended Serial I/o - External Status
 Int 6B Fn 20  - Connection Manager Client.exe - ???
 Int 6B Fn 21  - Npc Ncsi Extended Serial I/o - Query Name Service
 Int 6B Fn 6B  - Tandy Schoolmate Plus - API