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 00h - 05h               Superseded
 06h                     Direct Console I/O
 07h                     Direct Console Input
 08h                     Read Keyboard without Echo
 09h - 0Ah               Superseded
 0Bh                     Check Keyboard Status
 0Ch                     Flush Buffer, Read Keyboard
 0Dh                     Reset Drive
 0Eh                     Set Default Drive
 0Fh - 17h               Superseded
 19h                     Get Default Drive
 1Ah                     Set Disk Transfer Address (DTA)
 1Bh - 1Ch               Superseded
 1Fh                     Get Default DPB                             DOS 5.0+
 21h - 24h               Superseded
 25h                     Set Interrupt Vector
 26h - 28h               Superseded
 29h                     Parse Filename
 2Ah                     Get Date
 2Bh                     Set Date
 2Ch                     Get Time
 2Dh                     Set Time
 2Eh                     Set/Reset Verify Flag
 2Fh                     Get Disk Transfer Address (DTA)
 30h                     Get Version Number
 31h                     Keep Program
 32h                     Get DPB                                     DOS 5.0+
 3300h                   Get Ctrl-C Check Flag
 3301h                   Set Ctrl-C Check Flag
 3305h                   Get Startup Drive
 3306h                   Get MS-DOS Version                          DOS 5.0+
 34h                     Get InDOS Flag Address
 35h                     Get Interrupt Vector
 36h                     Get Disk Free Space
 38h                     Get/Set Country Information
 39h                     Create Directory (MKDIR)
 3Ah                     Remove Directory (RMDIR)
 3Bh                     Change Current Directory (CHDIR)
 3Ch                     Create File with Handle
 3Dh                     Open File with Handle
 3Eh                     Close File with Handle
 3Fh                     Read File or Device
 40h                     Write File or Device
 41h                     Delete File
 42h                     Move File Pointer (LSEEK)
 4300h                   Get File Attributes
 4301h                   Set File Attributes
 4400h                   Get Device Data
 4401h                   Set Device Data
 4402h                   Receive Control Data from Character Device
 4403h                   Send Control Data to Character Device
 4404h                   Receive Control Data from Block Device
 4405h                   Send Control Data to Block Device
 4406h                   Check Device Input Status
 4407h                   Check Device Output Status
 4408h                   Does Device Use Removable Media             DOS 3.0+
 4409h                   Is Drive Remote                             DOS 3.1+
 440Ah                   Is File or Device Remote                    DOS 3.1+
 440Bh                   Set Sharing Retry Count                     DOS 3.1+
 440Ch                   . Generic IOCTL for Character Devices
 440Ch /45h              Set Iteration Count                         DOS 3.2+
 440Ch /4ah              Select Code Page                            DOS 3.3+
 440Ch /4ch              Start Code-Page Prepare                     DOS 3.3+
 440Ch /4dh              End Code-Page Prepare                       DOS 3.3+
 440Ch /5fh              Set Display Mode                            DOS 4.0+
 440Ch /65h              Get Iteration Count                         DOS 3.2+
 440Ch /6ah              Query Selected Code Page                    DOS 3.3+
 440Ch /6bh              Query Code-Page Prepare List                DOS 3.3+
 440Ch /7fh              Get Display Mode                            DOS 4.0+
 440Dh                   . Generic IOCTL for Block Devices
 440Dh /40h              Set Device Parameters                       DOS 3.2+
 440Dh /41h              Write Track on Logical Drive                DOS 3.2+
 440Dh /42h              Format Track on Logical Drive               DOS 3.2+
 440Dh /46h              Set Media ID                                DOS 4.0+
 440Dh /60h              Get Device Parameters                       DOS 3.2+
 440Dh /61h              Read Track on Logical Drive                 DOS 3.2+
 440Dh /62h              Verify Track on Logical Drive               DOS 3.2+
 440Dh /66h              Get Media ID                                DOS 4.0+
 440Dh /68h              Sense Media Type                            DOS 5.0+
 440Eh                   Get Logical Drive Map                       DOS 3.2+
 440Fh                   Set Logical Drive Map                       DOS 3.2+
 4410h                   Query IOCTL Handle                          DOS 5.0+
 4411h                   Query IOCTL Device                          DOS 5.0+
 45h                     Duplicate File Handle
 46h                     Force Duplicate File Handle
 47h                     Get Current Directory (GETDIR)
 48h                     Allocate Memory
 49h                     Free Allocated Memory
 4Ah                     Set Memory Block Size
 4B00h                   Load and Execute Program (EXEC)
 4B01h                   Load Program
 4B03h                   Load Overlay
 4B05h                   Set Execution State                         DOS 5.0+
 4Ch                     End Program (EXIT)
 4Dh                     Get Child-Program Return Value
 4Eh                     Find First File (FIND FIRST)
 4Fh                     Find Next File (FIND NEXT)
 50h                     Set PSP Address
 51h                     Get PSP Address
 54h                     Get Verify State
 56h                     Rename File (RENAME)
 5700h                   Get File Date and Time
 5701h                   Set File Date and Time
 5800h                   Get Allocation Strategy                     DOS 3.0+
 5801h                   Set Allocation Strategy                     DOS 3.0+
 5802h                   Get Upper-Memory Link                       DOS 5.0+
 5803h                   Set Upper-Memory Link                       DOS 5.0+
 59h                     Get Extended Error                          DOS 3.0+
 5Ah                     Create Temporary File                       DOS 3.0+
 5Bh                     Create New File                             DOS 3.0+
 5Ch                     Lock/Unlock File                            DOS 3.1+
 5D0Ah                   Set Extended Error                          DOS 3.1+
 5E00h                   Get Machine Name                            DOS 3.1+
 5E02h                   Set Printer Setup                           DOS 3.1+
 5E03h                   Get Printer Setup                           DOS 3.1+
 5F02h                   Get Assign-List Entry                       DOS 3.1+
 5F03h                   Make Network Connection                     DOS 3.1+
 5F04h                   Delete Network Connection                   DOS 3.1+
 62h                     Get PSP Address                             DOS 3.0+
 6501h                   Get Extended Country Information            DOS 3.3+
 6502h                   Get Uppercase Table                         DOS 3.3+
 6504h                   Get Filename Uppercase Table                DOS 3.3+
 6505h                   Get Filename-Character Table                DOS 3.3+
 6506h                   Get Collate-Sequence Table                  DOS 3.3+
 6507h                   Get Double-Byte Character Set               DOS 4.0+
 6520h                   Convert Character                           DOS 4.0+
 6521h                   Convert String                              DOS 4.0+
 6522h                   Convert ASCIIZ String                       DOS 4.0+
 6601h                   Get Global Code Page                        DOS 3.3+
 6602h                   Set Global Code Page                        DOS 3.3+
 67h                     Set Maximum Handle Count                    DOS 3.3+
 68h                     Commit File                                 DOS 3.3+
 6Ch                     Extended Open/Create                        DOS 4.0+
 Version notes