214400 INT 21 - DOS 2+ - IOCTL - GET DEVICE INFORMATION
214401 INT 21 - DOS 2+ - IOCTL - SET DEVICE INFORMATION
214402 INT 21 - DOS 2+ - IOCTL - READ FROM CHARACTER DEVICE CONTROL CHANNEL
214402 INT 21 - Network Driver Interface Specification (NDIS) 2.0.1 - PROTOCOL MANAGER
214402 INT 21 U - MS-DOS 7.0+ - CONFIG$ device - GET CONFIGURATION INFORMATION
214402 INT 21 U - IBM SYSTEM 36/38 WORKSTATION EMULATION - VDI.SYS - GET ???
214402 INT 21 U - LASTBYTE.SYS v1.19 - IOCTL - GET ??? TABLE
214402 INT 21 - HIGHUMM.SYS v1.17+ - IOCTL - GET API ADDRESS
214402 INT 21 - SMARTDRV.SYS v3.x only - IOCTL - GET CACHE STATUS
214402 INT 21 - CD-ROM device driver - IOCTL INPUT
214402 INT 21 - Quarterdeck - QEMM-386 v5+ - GET API ENTRY POINT
214402 INT 21 U - Quarterdeck - HOOKROM.SYS - GET HOOKED VECTOR TABLE
214402 INT 21 - Advanced SCSI Programming Interface (ASPI) - INTERFACE
214402 INT 21 U - Qualitas 386MAX v6.00+ - IOCTL INPUT - GET STATE
214402 INT 21 - PGS1600.DEV - IOCTL - GET CONFIGURATION INFO
214402 INT 21 - PC/TCP IPCUST.SYS - RESET CONFIGURATION DATA READ POINTER
214402 INT 21 - WORKGRP.SYS - GET API ENTRY POINT
214402 INT 21 - 10NET v5.0 - 10BEUI.DOS - API
214402 INT 21 - 10NET v5.0 - 10MEMMGR.SYS - API
214402 INT 21 - Compaq AG1024.SYS - RGDI - GET DRIVER LOCATION
214402 INT 21 - FTPSOFT.DOS v3.1 - GET ???
214402 INT 21 U - PenDOS PENDEV.SYS - GET ENTRY POINTS
214402 INT 21 U - LAN Manager - TCPDRV.DOS - API
214402 INT 21 U - PC Tools 9 CPRLOW.EXE - GET CODE AND DATA ADDRESSES
214402 INT 21 U - Creative Technology CTMMSYS.SYS v1.00.01 - API
214402 INT 21 U - Creative Technology CTSB2.SYS v1.01.01 - API
214402 INT 21 U - Novell DOS 7+ EMM386.EXE - GET STATE RECORD
214402SF00 INT 21 U - Memory Managers - GET API ENTRY POINT
214402SF01 INT 21 U - Memory Managers - GET EMM IMPORT STRUCTURE ADDRESS
214402SF02 INT 21 U - Memory Managers - GET MEMORY MANAGER VERSION
214402 INT 21 U - Microsoft EMM386.EXE v4.45 - GET MEMORY MANAGER INFORMATION
214402 INT 21 U - IFSHLP.SYS - GET ENTRY POINT
214402 INT 21 - ATA Software Programming Interface (ATASPI) - INTERFACE
214402 INT 21 - DRFAT32.SYS device driver - IOCTL INPUT
214403 INT 21 - DOS 2+ - IOCTL - WRITE TO CHARACTER DEVICE CONTROL CHANNEL
214403 INT 21 - SMARTDRV.SYS v3.x only - IOCTL - CACHE CONTROL
214403 INT 21 - CD-ROM device driver - IOCTL OUTPUT
214403 INT 21 U - MS-DOS 7.0+ - CONFIG$ device - SET??? CONFIGURATION INFORMATION
214403 INT 21 - Brian Antoine Seagate ST-01 SCSI.SYS - IOCTL - EXECUTE COMMANDS
214403 INT 21 U - AI Architects - OS/x86??? - API
214403 INT 21 - PGS1600.DEV - IOCTL - SET CONFIGURATION???
214403 INT 21 - PC/TCP IPCUST.SYS - RESET CONFIGURATION DATA READ POINTER
214403 INT 21 - Compaq AG1024.SYS - CPQ_MGES - IOCTL OUTPUT
214403 INT 21 - Compaq AG1024.SYS - RGDI - IOCTL OUTPUT
214403SF01 INT 21 U - Qualitas 386MAX v6.01+ - TURN 386MAX OFF
214403SF02 INT 21 U - Qualitas 386MAX v6.01+ - TURN 386MAX ON
214403SF03 INT 21 U - Qualitas 386MAX v6.01+ - SET STATE
214403SF05 INT 21 U - Qualitas 386MAX v7.00+ - LIMIT AUTOMATIC ACTIVATION TO STD EMS CALLS
214403SF06 INT 21 U - Qualitas 386MAX v7.00+ - ALLOW AUTOMATIC ACTIVATION ON ANY INT 67
214403 INT 21 U - PenDOS PENDEV.SYS - ???
214403 INT 21 - DR DOS $IDLE$ - IOCTL - DYNAMIC IDLE DETECTION CONTROL
214404 INT 21 - DOS 2+ - IOCTL - READ FROM BLOCK DEVICE CONTROL CHANNEL
214404 INT 21 - Stacker - GET DEVICE DRIVER ADDRESS AND SET VOLUME NUMBER
214404 INT 21 - Stacker - GET STACVOL FILE SECTORS
214404 INT 21 - DUBLDISK.SYS v2.6 - GET INFO
214404 INT 21 - DBLSPACE.BIN - IOCTL - FLUSH OR INVALIDATE INTERNAL CACHES
214404 INT 21 - DBLSPACE.BIN v6.2 - IOCTL - GET ??? FOR SPECIFIED DRIVE
214404 INT 21 U - DoubleTools v1.0 - GET ???
214404 INT 21 U - xDISK v3.31 - CONFIGURE
214404 INT 21 - COMBI-disk v1.13 - GET DATA RECORD
214404 INT 21 - SFS v1.00 - GET CONFIGURATION INFORMATION
214405 INT 21 - DOS 2+ - IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL
214405 INT 21 - Brian Antoine Seagate ST-01 SCSI.SYS - IOCTL - EXECUTE COMMANDS
214405 INT 21 U - DBLSPACE.BIN - IOCTL - FLUSH OR INVALIDATE INTERNAL CACHES
214405 INT 21 U - xDISK v3.31 - ???
214405 INT 21 - COMBI-disk v1.13 - CONTROL COMBI-disk
214405 INT 21 - SFS v1.00 - DRIVER CONTROL
214405 INT 21 U - SUPERSTOR - IOCTL - INSTALL CHECK
214406 INT 21 - DOS 2+ - IOCTL - GET INPUT STATUS
214407 INT 21 - DOS 2+ - IOCTL - GET OUTPUT STATUS
214408 INT 21 - DOS 3.0+ - IOCTL - CHECK IF BLOCK DEVICE REMOVABLE
214409 INT 21 - DOS 3.1+ - IOCTL - CHECK IF BLOCK DEVICE REMOTE
21440A INT 21 - DOS 3.1+ - IOCTL - CHECK IF HANDLE IS REMOTE
21440B INT 21 - DOS 3.1+ - IOCTL - SET SHARING RETRY COUNT
21440C INT 21 - DOS 3.2+ - IOCTL - GENERIC CHARACTER DEVICE REQUEST
21440C INT 21 - Greg Shenaut ASPITAPE.SYS - INTERFACE
21440D INT 21 - DOS 3.2+ - IOCTL - GENERIC BLOCK DEVICE REQUEST
21440DCX084A INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK LOGICAL VOLUME
21440DCX084B INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK PHYSICAL VOLUME
21440DCX086A INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK LOGICAL VOLUME
21440DCX086B INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK PHYSICAL VOLUME
21440DCX086C INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET LOCK FLAG STATE
21440DCX086D INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - ENUMERATE OPEN FILES
21440DCX086E INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - FIND SWAP FILE
21440DCX0870 INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET CURRENT LOCK STATE
21440DCX0871 INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET FIRST CLUSTER
21440DCXEDC1 INT 21 - DR PalmDOS - GENERIC IOCTL - LOGIN SECURITY
21440E INT 21 - DOS 3.2+ - IOCTL - GET LOGICAL DRIVE MAP
21440F INT 21 - DOS 3.2+ - IOCTL - SET LOGICAL DRIVE MAP
214410 INT 21 - DOS 5+ - IOCTL - QUERY GENERIC IOCTL CAPABILITY (HANDLE)
214410BXFFFF INT 21 U - NewSpace - ENABLE DRIVER
214411 INT 21 - DOS 5+ - IOCTL - QUERY GENERIC IOCTL CAPABILITY (DRIVE)
214411BXFFFF INT 21 U - NewSpace - DISABLE DRIVER
214412 INT 21 O - DR DOS 5.0-6.0 - DETERMINE DOS TYPE
214412BXFFFF INT 21 U - NewSpace - INSTALLATION CHECK???
214413BXFFFF INT 21 U - NewSpace - GET ???
214414 INT 21 OU - DR DOS 5.0-6.0 - SET GLOBAL PASSWORD
214414BXFFFF INT 21 U - NewSpace - DEBUGGING DUMP
214416 INT 21 OU - DR DOS 5.0-6.0 - HISTORY BUFFER, SHARE, AND HILOAD CONTROL
214451 INT 21 - Concurrent DOS v3.2+ - INSTALLATION CHECK
214452 INT 21 - DR DOS 3.41+ - DETERMINE DOS TYPE/GET DR DOS VERSION
214454 INT 21 U - DR DOS 3.41+ - SET GLOBAL PASSWORD
214456 INT 21 U - DR DOS 5.0+ - HISTORY BUFFER CONTROL
214457 INT 21 U - DR DOS 5.0-6.0 - SHARE/HILOAD CONTROL
214457DXFFFF INT 21 OU - DR DOS 6.0 - GET SHARE STATUS
214458 INT 21 U - DR DOS 5.0+ internal - GET POINTER TO INTERNAL VARIABLE TABLE
214459 INT 21 - DR Multiuser DOS 5.0 - API
21445A INT 21 U - Concurrent DOS etc. - USER GROUP SUPPORT
2144A0 INT 21 - VIRUS - "Horns" - INSTALLATION CHECK
2144E0 INT 21 U - Sun PC-NFS - API???
2144FFBXFFFF INT 21 U - NewSpace - ???