This is the complete, combined list of DOS functions and BIOS interrupts

and common DOS extension services covered by TECH Help!  These are listed

by interrupt number, then sub-function number. For more manageable chunks,

see:

API Index ........ Individual APIs listed separately

Service Groups ... Indexes with functions grouped by category

TECH Topics ...... Often used topics, plus API overviews and articles

General Index .... Lots of ways to find stuff

DOS Fns QuickRef   by Number   by DOS Version  Obsolete Fns

DOS Interrupts

                                               Interrupts and BIOS Services

INT 00H: Division Overflow

INT 01H: Single-Step Interrupt

INT 02H: Non-Maskable Interrupt

INT 03H: Breakpoint Interrupt

INT 04H: Overflow Interrupt

INT 05H: Print Screen / Bounds Exception

INT 06H: Invalid Opcode

INT 07H: Math Coprocessor Not Present

INT 08H: Timer Interrupt

INT 09H: Keyboard Interrupt

INT 0aH: IRQ 2 Cascade / Invalid Task State

INT 0bH: IRQ 3 COM2/4 / Segment Not Present

INT 0cH: IRQ 4 COM1/3 / Stack Overflow

INT 0dH: IRQ 5 LPT2 / General Protection Fault

INT 0eH: Diskette Interrupt / Page Fault

INT 0fH: IRQ 7 LPT1

                                                    INT 10H: Video Services

INT 10H 00H: Set Video Mode

INT 10H 01H: Set Cursor Shape & Size

INT 10H 02H: Set Cursor Position

INT 10H 03H: Query Cursor Position and Size

INT 10H 04H: Query Light Pen

INT 10H 05H: Select Video Page

INT 10H 06H: Scroll Up / Clear Screen Rectangle

INT 10H 07H: Scroll Down / Clear Screen Rectangle

INT 10H 08H: Read Character/Attribute at Cursor Location

INT 10H 09H: Write Character/Attribute to Cursor Location

INT 10H 0aH: Write Character to Cursor Location

INT 10H 0bH: Select Graphics Palette or Text Border Color

INT 10H 0cH: Write Graphics Pixel

INT 10H 0dH: Read Graphics Pixel

INT 10H 0eH: Write Character as TTY

INT 10H 0fH: Query Current Video Info

INT 10H 13H: AT/EGA/VGA String Display Functions

INT 10H 1300H: Display String

INT 10H 1301H: Display String and Update Cursor

INT 10H 1302H: Display Character/Attribute Cells

INT 10H 1303H: Display Char/Attr Cells & Update Cursor

INT 10H 10H: EGA/VGA Palette Functions

INT 10H 1000H: Set One Palette Register

INT 10H 1001H: Set Overscan/Border Color Register

INT 10H 1002H: Set All Palette Registers and Overscan

INT 10H 1003H: Select Foreground Blink or Bold Background

INT 10H 1007H: Read One Palette Register

INT 10H 1008H: Read Overscan Register

INT 10H 1009H: Read All Palette Registers

INT 10H 1010H: Set One DAC Color Register

INT 10H 1012H: Set a Block of DAC Color Register

INT 10H 1013H: DAC Color Paging Functions

INT 10H 1015H: Read One DAC Color Register

INT 10H 1017H: Read a Block of DAC Color Registers

INT 10H 101aH: Query DAC Color Paging State

INT 10H 101bH: Convert DAC Colors to Gray-Scale Values

INT 10H 11H: EGA/VGA Character Generator Functions

INT 10H 1100H: Load User-Defined Font

INT 10H 1101H: Load ROM 8x14 Character Set

INT 10H 1102H: Load ROM 8x8 Character Set

INT 10H 1103H: Activate Font Block

INT 10H 1104H: Load ROM 8x16 Character Set

INT 10H 1110H: Load and Activate User-Defined Font

INT 10H 1111H: Load and Activate ROM 8x14 Character Set

INT 10H 1112H: Load and Activate ROM 8x8 Character Set

INT 10H 1114H: Load and activate ROM 8x16 Character Set

INT 10H 1120H: Setup INT 1fH Vector

INT 10H 1121H: Setup User-Defined Font for Graphics Mode

INT 10H 1122H: Setup ROM 8x14 Font for Graphics Mode

INT 10H 1123H: Setup ROM 8x8 Font for Graphics Mode

INT 10H 1124H: Setup ROM 8x16 Font for Graphics Mode

INT 10H 1130H: Get Current Character Generator Info

INT 10H 12H: EGA/VGA Special Functions/Alternate Select

INT 10H 12H BL=10H: Get EGA information

INT 10H 12H BL=20H: Select Alternate Print Screen Handler

INT 10H 12H BL=30H: Select Scan Lines for Text Modes

INT 10H 12H BL=31H: Palette Loading on Mode Set

INT 10H 12H BL=32H: Enable/Disable Video RAM & I/O Ports

INT 10H 12H BL=33H: Enable/Disable Gray-Scale Summing

INT 10H 12H BL=34H: Cursor Emulation (Scaling)

INT 10H 12H BL=35H: Switch PS/2 Displays

INT 10H 12H BL=36H: Enable/Disable Screen Refresh

INT 10H 1aH: Set or Query Display Combination Code

INT 10H 1bH: Get VGA Functionality and State Info

INT 10H 1cH: VGA State Save/Restore Functions

INT 10H 1c00H: VGA Query Size of State-Save Buffer

INT 10H 1c01H: VGA Save Video State

INT 10H 1c02H: VGA Restore Video State

                                                   VESA/SVGA BIOS Functions

INT 10H 4f00H - Query SuperVGA Support

INT 10H 4f01H - Query SuperVGA Mode Information

INT 10H 4f02H - Set SuperVGA Video Mode

INT 10H 4f03H - Query Current SuperVGA Video Mode

INT 10H 4f04H - Save/Restore SuperVGA State

INT 10H 4f05H - Query/Set SuperVGA Video Memory Window

INT 11H: Equipment Check

INT 12H: Conventional Memory Size

                                                     INT 13H: BIOS Disk I/O

INT 13H 00H: Reset Drive

INT 13H 01H: Query Disk Error Status

INT 13H 02H: Read Sectors

INT 13H 03H: Write Sectors

INT 13H 04H: Verify Sectors

INT 13H 05H: Format Track

INT 13H 08H: Get Drive Parameters

INT 13H 09H: Initialize Drive Parameter Table

INT 13H 0aH: Read Sector Plus ECC

INT 13H 0bH: Write Sector Plus ECC

INT 13H 0cH: Seek Cylinder

INT 13H 0dH: Alternate Reset Drive

INT 13H 10H: Test Drive Ready

INT 13H 11H: Recalibrate Drive

INT 13H 14H: Controller Self-Test

INT 13H 15H: Get Diskette Type or Check Hard Drive Installed

INT 13H 16H: Detect Media Change

INT 13H 17H: Set Media Transfer Rate

INT 13H 18H: Set Media Type for Format

                                                   INT 14H: Serial Port I/O

INT 14H 00H: Initialize Asynchronous Communication Port

INT 14H 01H: Send a Character

INT 14H 02H: Receive a Character

INT 14H 03H: Query Serial Port Status

                                        INT 15H: AT Extended Services / APM

INT 15H 4fH: Keyboard Intercept

INT 15H 80H: Device Open

INT 15H 81H: Device Close

INT 15H 82H: Program Termination

INT 15H 8300H: Set Event Wait Interval

INT 15H 8301H: Cancel Event Wait Interval

INT 15H 84H: Joystick Support

INT 15H 85H: SysReq Key

INT 15H 86H: Wait

INT 15H 87H: Move Memory Block

INT 15H 88H: Get Extended Memory Size

INT 15H 89H: Switch to Protected mode

INT 15H 90H: Device Busy

INT 15H 91H: Interrupt Finished

INT 15H c0H: Get System Parameters

                                                       Power Management API

INT 15H 5300H: Installation Check

INT 15H 5301H: Interface Connect

INT 15H 5302H: Interface Connect (Prot. Mode/16-bit)

INT 15H 5303H: Interface Connect (Prot. Mode/32-bit)

INT 15H 5304H: Interface Disconnect

INT 15H 5305H: CPU Idle

INT 15H 5306H: CPU Busy

INT 15H 5307H: Set Power State

INT 15H 5308H: Enable/Disable Power Management

INT 15H 5309H: Restore System-BIOS Power-On Defaults

INT 15H 530aH: Query Power Status

INT 15H 530bH: Get Power Management Event

                                                 INT 16H: Keyboard Services

INT 16H 00H: Read (Wait for) Next Keystroke

INT 16H 01H: Query Keyboard Status / Preview Key

INT 16H 02H: Query Keyboard Shift Status

INT 16H 03H: Set Keyboard Typematic Rate and Delay

INT 16H 05H: Store Keystroke Data

INT 16H 10H: Read Extended Keyboard Input

INT 16H 11H: Query Extended Keyboard Status / Preview Key

INT 16H 12H: Query Extended Keyboard Shift Status

                                                   INT 17H: Printer Support

INT 17H 00H: Print One Character

INT 17H 01H: Initialize Printer Port

INT 17H 02H: Query Printer Status

INT 18H: ROM-BASIC

INT 19H: Bootstrap Loader

                                    INT 1aH: Timer I/O (and MRCI POST Hook)

INT 1aH 00H: Read System Clock (Ticks)

INT 1aH 01H: Set System Clock (Ticks)

INT 1aH 02H: Read Time from Real-Time Clock

INT 1aH 03H: Set Time on Real-Time Clock

INT 1aH 04H: Read Date from Real-Time Clock

INT 1aH 05H: Set Date on Real-Time Clock

INT 1aH 06H: Set Real-Time Clock Alarm

INT 1aH 07H: Cancel Real-Time Clock Alarm

INT 1aH b001H: Query ROM/Hardware-Based MRCI Support

INT 1bH: Keyboard Break

INT 1cH: User Timer Interrupt

INT 1dH: Video Initialization Table Pointer

INT 1eH: Diskette Parameter Pointer

INT 1fH: CGA Graphics Character Font Pointer

INT 20H: Program Terminate

                                                     INT 21H: DOS Functions

DOS Fn 00H: Terminate a Program

DOS Fns 01H-0cH: Low-level I/O

DOS Fn 01H: Keyboard Input

DOS Fn 02H: Display Output

DOS Fn 03H: Auxiliary Input

DOS Fn 04H: Auxiliary Output

DOS Fn 05H: Printer Output

DOS Fn 06H: Console I/O

DOS Fn 07H: No Echo Unfiltered Console Input

DOS Fn 08H: No Echo Console Input

DOS Fn 09H: Display String

DOS Fn 0aH: Buffered String Input

DOS Fn 0bH: Check Input Status

DOS Fn 0cH: Clear & Input

DOS Fn 0dH: Reset Disk

DOS Fn 0eH: Select DOS Default Disk

DOS Fn 0fH: Open File via FCB

DOS Fn 10H: Close File via FCB

DOS Fn 11H: Find 1st Matching File via FCB

DOS Fn 12H: Find Next Matching File via FCB

DOS Fn 13H: Delete File via FCB

DOS Fn 14H: Read Sequential File via FCB

DOS Fn 15H: Write Sequential File via FCB

DOS Fn 16H: Create File via FCB

DOS Fn 17H: Rename File via FCB

DOS Fn 19H: Query DOS Default Disk

DOS Fn 1aH: Set Disk Transfer Address (DTA)

DOS Fn 1bH: Get Drive Info (current disk)

DOS Fn 1cH: Get Drive Info (any disk)

DOS Fn 1fH: Get Drive Parameter Block (current disk)

DOS Fn 21H: Read Random File Record

DOS Fn 22H: Write Random File Record

DOS Fn 23H: Query File Size via FCB

DOS Fn 24H: Set Random File Block Address

DOS Fn 25H: Set Interrupt Vector

DOS Fn 26H: Create Program Segment Prefix

DOS Fn 27H: Read Random File Block

DOS Fn 28H: Write Random File Block

DOS Fn 29H: Parse Filename

DOS Fn 2aH: Query DOS Date

DOS Fn 2bH: Set DOS Date

DOS Fn 2cH: Query DOS Time

DOS Fn 2dH: Set DOS Time

DOS Fn 2eH: Set/Reset Verify Switch

DOS Fn 2fH: Query Disk Transfer Address (DTA)

DOS Fn 30H: Get DOS Version Number

DOS Fn 31H: Terminate & Stay Resident

DOS Fn 32H: Get DPB (Drive Parameter Block)

DOS Fn 33H: Set/Query Break-check; Query DOS Info

DOS Fn 3300H: Query Break-Check Flag

DOS Fn 3301H: Set Break-check level

DOS Fn 3305H: Get Boot Drive

DOS Fn 3306H: Get DOS Version Info

DOS Fn 34H: Get InDOS Address (DOS Reentrancy Status)

DOS Fn 35H: Get Interrupt Vector

DOS Fn 36H: Get Disk Free Space

DOS Fn 37H: Set or Query Switch Character

DOS Fn 3700H: Query Switchar

DOS Fn 3701H: Set Switchar

DOS Fn 38H: Get/Set Country-dependent Info

DOS Fn 39H: Create a New Directory -- MKDIR

DOS Fn 3aH: Delete a Directory -- RMDIR

DOS Fn 3bH: Set DOS Default Directory -- CHDIR

DOS Fn 3cH: Create a File via Handle

DOS Fn 3dH: Open a File via Handle

DOS Fn 3eH: Close a File Handle

DOS Fn 3fH: Read from File via Handle

DOS Fn 40H: Write to File via Handle

DOS Fn 41H: Delete File

DOS Fn 42H: Set File Pointer

DOS Fn 43H: Set or Query File attributes

DOS Fn 4300H: Query File Attribute

DOS Fn 4301H: Set File Attribute

DOS Fn 44H: Device I/O Control -- IOCTL

DOS Fn 4400H: IOCTL Query Device/File Flags

DOS Fn 4401H: IOCTL Set Device/File Flags

DOS Fn 4402H: IOCTL Receive Control Data from Char Device

DOS Fn 4403H: IOCTL Send Control Data to Character Device

DOS Fn 4404H: IOCTL Receive Control Data from Block Device

DoubleSpace IOCTL fn 'F': Flush DoubleSpace Cache

DoubleSpace IOCTL fn 'I': Flush and Invalidate Cache

DoubleSpace IOCTL fn 'S': Get DriveSpace Pointers

DOS Fn 4405H: IOCTL Send Control Data to Block Device

DOS Fn 4406H: IOCTL Query Handle Input Status

DOS Fn 4407H: IOCTL Query Handle Output Status

DOS Fn 4408H: IOCTL Does Drive Use Removable Media

DOS Fn 4409H: IOCTL Is Drive Remote or SUBST

DOS Fn 440aH: IOCTL Is File/Device Remote

DOS Fn 440bH: IOCTL Set Sharing Retry Count

DOS Fn 440cH: Generic I/O Control -- Character Devices

DOS Fn 440cH CL=45H: IOCTL Set Retry Iteration Count

DOS Fn 440cH CL=4AH: IOCTL Select Code Page

DOS Fn 440cH CL=4CH: IOCTL Start Code Page Prepare

DOS Fn 440cH CL=4DH: IOCTL End Code Page Prepare

DOS Fn 440cH CL=5Fh: IOCTL Set Display Mode

DOS Fn 440cH CL=65H: IOCTL Query Retry Iteration Count

DOS Fn 440cH CL=6AH: IOCTL Query Current Code Page

DOS Fn 440cH CL=6BH: IOCTL Query Code Page List

DOS Fn 440cH CL=7Fh: IOCTL Query Display Mode

DOS Fn 440dH: Generic I/O Control -- Block Devices

DOS Fn 440dH CL=40H: IOCTL Set Device Parameters

DOS Fn 440dH CL=41H: IOCTL Write Track on Logical Drive

DOS Fn 440dH CL=42H: IOCTL Format Track on Logical Drive

DOS Fn 440dH CL=46H: IOCTL Set Media ID

DOS Fn 440dH CL=47H: IOCTL Set Access Flag

DOS Fn 440dH CL=60H: IOCTL Query Device Parameters

DOS Fn 440dH CL=61H: IOCTL Read Track on Logical Drive

DOS Fn 440dH CL=62H: IOCTL Verify Track on Logical Drive

DOS Fn 440dH CL=66H: IOCTL Query Media ID

DOS Fn 440dH CL=67H: IOCTL Query Access Flag

DOS Fn 440dH CL=68H: IOCTL Sense Media Type

DOS Fn 440eH: IOCTL Query Logical Drive Map

DOS Fn 440fH: IOCTL Set Logical Drive Map

DOS Fn 4410H: IOCTL Query IOCTL Support for Handle

DOS Fn 4411H: IOCTL Query IOCTL Support for Device

DOS Fn 45H: Duplicate a File Handle

DOS Fn 46H: Redirect a Handle

DOS Fn 47H: Query Default Directory

DOS Fn 48H: Allocate Memory / Query Free Memory

DOS Fn 49H: Free Allocated Memory Block

DOS Fn 4aH: Shrink or Expand a Memory Block

DOS Fn 4bH: Load or Execute a program

DOS Fn 4b00H: Execute a Program

DOS Fn 4b01H: Load Program

DOS Fn 4b03H: Load Overlay

DOS Fn 4b05H: Set Execution State

DOS Fn 4cH: Terminate Program

DOS Fn 4dH: Get Program Exit Code

DOS Fn 4eH: Find 1st Matching File

DOS Fn 4fH: Find Next Matching File

DOS Fn 50H: Set PSP

DOS Fn 51H: Query Current PSP

DOS Fn 52H: Get DOS Variables

DOS Fn 53H: Convert BPB to DPB

DOS Fn 54H: Get DOS Verify State

DOS Fn 56H: Rename/Move a File

DOS Fn 57H: Set or Query File Time/Date

DOS Fn 5700H: Query File Time/Date

DOS Fn 5701H: Set File Time/Date

DOS Fn 58H: Set or Query Memory Allocation Options

DOS Fn 5800H: Query Memory Allocation Strategy

DOS Fn 5801H: Set Memory Allocation Strategy

DOS Fn 5802H: Query Upper-Memory Link State

DOS Fn 5803H: Set Upper-Memory Link State

DOS Fn 59H: Get Extended Error Info

DOS Fn 5aH: Create Unique Temporary File

DOS Fn 5bH: Create New File

DOS Fn 5cH: Lock/Unlock File Access

DOS Fn 5c00H: Lock File Access

DOS Fn 5c01H: Unlock File Access

DOS Fn 5d0aH: Set Extended Error

DOS Fn 5eH: Network Miscellaneous

DOS Fn 5e00H: Query Network Node Name

DOS Fn 5e02H: Set Network Printer Setup

DOS Fn 5e03H: Query Network Printer Setup

DOS Fn 5fH: Network Device Redirection

DOS Fn 5f02H: Network Query Assign-List Entry

DOS Fn 5f03H: Make Network Connection

DOS Fn 5f04H: Delete Network Connection

DOS Fn 60H: Query TrueName

DOS Fn 62H: Query Current PSP

DOS Fn 65H: Extended Country Information Functions

DOS Fn 6501H: Get Extended Country Information

DOS Fn 6504H: Get Uppercase Table

DOS Fn 6505H: Get Filename Character Table

DOS Fn 6506H: Get Collating Sequence Table

DOS Fn 6507H: Get Double-Byte Character Set

DOS Fn 6520H: Upshift Character

DOS Fn 6521H: Upshift String

DOS Fn 6522H: Upshift ASCIIZ String

DOS Fn 66H: Set or Query Active Code Page

DOS Fn 6601H: Query Active Code Page

DOS Fn 6602H: Activate Code Page

DOS Fn 67H: Set File Handle Count

DOS Fn 68H: Commit File

DOS Fn 6cH: Extended Open/Create

                                                     Device Driver Requests

Device Request 00H: Initialize device

Device Request 01H: Media Check

Device Request 02H: Build BPB

Device Request 03H: IOCTL Input

Device Request 04H: Input (Read Data from Device)

Device Request 05H: Non-destructive Input

Device Request 06H: Input Status

Device Request 07H: Input Flush

Device Request 08H: Output (Write Data to Device)

Device Request 09H: Output (Write/Verify Data to Device)

Device Request 0aH: Output Status

Device Request 0bH: Output Flush

Device Request 0cH: IOCTL Output

Device Request 0dH: Device Open

Device Request 0eH: Device Close

Device Request 0fH: Removable Media

Device Request 10H: Output Until Busy

Device Request 13H: Generic IOCTL Request

Device Request 17H: Get Logical Device

Device Request 18H: Set Logical Device

Device Request 19H: IOCTL Support Query

INT 22H: Terminate Address

INT 23H: Ctrl-Break Exit Address

INT 24H: Critical Error Handler

INT 25H/26H: Absolute Disk Read/Write

INT 27H: Terminate but Stay Resident

INT 28H: DOS Idle

INT 29H: Fast PUTCHAR

INT 2aH: Microsoft Network Services

INT 2eH: Perform DOS Command

                                               INT 2fH: Multiplex Interrupt

INT 2fH 01xxH: DOS Print Spooler Functions

INT 2fH 0100H: Is Print.Exe Installed?

INT 2fH 0101H: Submit File to Spooler

INT 2fH 0102H: Remove File from Print Queue

INT 2fH 0103H: Cancel All Files

INT 2fH 0104H: Hold All Jobs and Get Status

INT 2fH 0105H: Resume Printing

INT 2fH 0106H: Get Printer Device Driver Header

INT 2fH 0600H: Is Assign.Com Installed?

INT 2fH 1000H: Is Share.Exe Installed?

INT 2fH 1100H: Is Network Support Installed?

INT 2fH 1400H: Is Nlsfunc.Exe Installed?

INT 2fH 15xxH: Mscdex CD-ROM Functions

INT 2fH 1500H: Is MSCDEX Installed?/Count Drive Letters

INT 2fH 150dH: Query CD-ROM Drive Letters

                     INT 2fH 16xxH: Enh386 Windows Services & Notifications

INT 2fH 1600H: Is Enh386 Windows Installed?

INT 2fH 1602H: Get Enh386 Windows Entry-Point Address

INT 2fH 1605H: Windows Is About to Startup

INT 2fH 1606H: Windows Is About to Terminate

INT 2fH 1607H: Device Call Out

INT 2fH 1608H: Windows Initialization is Complete

INT 2fH 1609H: Windows is Terminating

INT 2fH 1680H: Program Idle (Release Timeslice)

INT 2fH 1681H: Begin Critical Section

INT 2fH 1682H: End Critical Section

INT 2fH 1683H: Get Current Virtual Machine ID

INT 2fH 1684H: Get Device Entry-Point Address (for VxDs)

INT 2fH 1685H: Switch VMs and CallBack

INT 2fH 1686H: Detect INT 31h DPMI Services     (see also: INT 31H, below)

INT 2fH 1687H: Get Real-to-Protected Mode Switch Address     (see INT 31H)

INT 2fH 168AH: Get Vendor-Specific DPMI API Entry Address    (see INT 31H)

                                 INT 2fH 17xxH: Windows Clipboard Functions

INT 2fH 1700H: Is Clipboard Available?

INT 2fH 1701H: Get Access to Clipboard

INT 2fH 1702H: Discard Clipboard Contents

INT 2fH 1703H: Put Data into the Clipboard

INT 2fH 1704H: Query Size of Clipboard Data

INT 2fH 1705H: Copy Clipboard Data to Buffer

INT 2fH 1708H: Release Control of the Clipboard

INT 2fH 1709H: See if Data Will Fit in Clipboard

INT 2fH 170aH: Obtain Device Capabilities

INT 2fH 1a00H: Is ANSI.SYS Installed?

                            INT 2fH 40xxH: Virtual Display Driver Functions

INT 2fH 4000H: Enable VM-Assisted Video Save/Restore

INT 2fH 4001H: Notify Background Switch

INT 2fH 4002H: Notify Foreground Switch

INT 2fH 4003H: Enter Critical Section

INT 2fH 4004H: Exit Critical Section

INT 2fH 4005H: Save Video Register State

INT 2fH 4006H: Restore Video Register State

INT 2fH 4007H: Disable VM-Assisted Video Save/Restore

                                                              XMS Functions

INT 2fH 4300H: Is HIMEM.SYS (XMS Support) Installed?

INT 2fH 4310H: Get HIMEM.SYS (XMM) Entry Address

XMS 00H: Get XMS Version Number

XMS 01H: Request High Memory Area

XMS 02H: Release High Memory Area

XMS 03H: Global Enable A20

XMS 04H: Global Disable A20

XMS 05H: Local Enable A20

XMS 06H: Local Disable A20

XMS 07H: Query A20 State

XMS 08H: Query Free Extended Memory

XMS 09H: Allocate Extended Memory Block

XMS 0aH: Free Extended Memory Block

XMS 0bH: Move Extended Memory Block

XMS 0cH: Lock Extended Memory Block

XMS 0dH: Unlock Extended Memory Block

XMS 0eH: Get Handle Information

XMS 0fH: Resize Extended Memory Block

XMS 10H: Request Upper Memory Block

XMS 11H: Release Upper Memory Block

                                        INT 2fH 48xxH: DOSKEY.COM Functions

INT 2fH 4800H: Is DOSKEY.COM Installed?

INT 2fH 4810H: Get Keyboard Input with Doskey Editing

                                        INT 2fH 4axxH: HMA Suballocations

INT 2fH 4a01H: Query HMA Free Space and Address

INT 2fH 4a02H: Suballocate HMA Memory

                           Microsoft Real-time Compression Interface (MRCI)

INT 2fH 4a12H: Get MRCI Installed State and Entry Address

MRCI Fn 0001H: Compress Data

MRCI Fn 0002H: Decompress Data

MRCI Fn 0020H: Incrementally Decompress Data

MRCI Fn ffffH: Deinstall Server

                                    INT 2fH 4a11H: DoubleSpace API Services

INT 2fH 4a11H BX=0000H: Get Dblspace Version & Drives

INT 2fH 4a11H BX=0001H: Get Dblspace Drive Mapping

INT 2fH 4a11H BX=0002H: Dblspace Swap Drive

INT 2fH 4a11H BX=0005H: Mount Dblspace Drive

INT 2fH 4a11H BX=0006H: Unmount Dblspace Drive

INT 2fH 4a11H BX=0007H: Get Dblspace Disk Size / Free Space

INT 2fH 4a11H BX=0008H: Get CVF Fragmentation Info

INT 2fH 4a11H BX=0009H: Get Count of DISK_UNIT Structures

INT 2fH 4a11H BX=000aH: Set Automount Drives

INT 2fH 4a11H BX=000bH: Query Automount Drives

                                                               Switcher API

INT 2fH 4BxxH: Task Switcher Functions

INT 2fH 4B01H: Build Notification Chain

INT 2fH 4B02H: Is Switcher Installed? / Get Service Addr

INT 2fH 4B03H: Allocate Switcher ID

INT 2fH 4B04H: Free Switcher ID

INT 2fH 4B05H: Identify Instance Data

SwNtfy Fn 0000H: A Switcher Is Being Initialized

SwNtfy Fn 0001H: Can Switcher Suspend Your Session?

SwNtfy Fn 0002H: Switcher Is Suspending Your Session

SwNtfy Fn 0003H: Switcher Is Activating Your Session

SwNtfy Fn 0004H: Session Is Now Active

SwNtfy Fn 0005H: Switcher Is Creating a Session

SwNtfy Fn 0006H: Switcher Is Destroying a Session

SwNtfy Fn 0007H: Switcher Is Exiting

SwSrvc Fn 0000H: Get Switcher Version

SwSrvc Fn 0001H: Test Memory Region

SwSrvc Fn 0002H: Suspend Switcher

SwSrvc Fn 0003H: Resume Switcher

SwSrvc Fn 0004H: Hook Notification Chain

SwSrvc Fn 0005H: Unhook Notification Chain

SwSrvc Fn 0006H: Query API Support

                                          INT 2fH adxxH: KEYB.COM Functions

INT 2fH ad80H: Is KEYB.COM Installed? / Get Version

INT 2fH ad81H: Set KEYB.COM Active Code Page

INT 2fH ad82H: Set KEYB.COM Country Flag

INT 2fH ad83H: Query KEYB.COM Country Flag

                         INT 2fH aexxH: Command Processor Command-Line Hook

INT 2fH ae00H: Notify Pending Command

INT 2fH ae01H: Process Hooked Command

INT 2fH b000H: Is GRAFTABL.COM Installed?

                                        INT 2fH b7xxH: APPEND.EXE Functions

INT 2fH b700H: Is APPEND.EXE Installed?

INT 2fH b702H: Get APPEND.EXE Version

INT 2fH b704H: Get APPEND.EXE Path String

INT 2fH b706H: Query APPEND.EXE Option Settings

INT 2fH b707H: Set APPEND.EXE Options / Disable APPEND

INT 2fH b711H: Set APPEND.EXE Truename Flag

INT 2fH xxfbH: FaxBIOS Functions

                                                              DPMI Services

INT 2fH 1687H: Get Real-to-Protected Mode Switch Address

INT 2fH 168AH: Get Vendor-Specific DPMI API Entry Address

INT 31H 0000H: Allocate LDT Descriptors

INT 31H 0001H: Free LDT Descriptor

INT 31H 0002H: Segment to Descriptor

INT 31H 0003H: Query Selector Increment Value

INT 31H 0006H: Query Segment Base Address

INT 31H 0007H: Set Segment Base Address

INT 31H 0008H: Set Segment Limit

INT 31H 0009H: Set Descriptor Access Rights

INT 31H 000aH: Create Alias Descriptor

INT 31H 000bH: Query Descriptor

INT 31H 000cH: Set Descriptor

INT 31H 000dH: Allocate Specific Descriptor

INT 31H 000eH: Query Multiple Descriptors

INT 31H 000fH: Set Multiple Descriptors

INT 31H 0100H: Allocate DOS Memory Block

INT 31H 0101H: Free DOS Memory Block

INT 31H 0102H: Resize DOS Memory Block

INT 31H 0200H: Query Real-mode Interrupt Vector

INT 31H 0201H: Set Real-mode Interrupt Vector

INT 31H 0202H: Query Processor Exception Handler Vector

INT 31H 0203H: Set Processor Exception Handler Vector

INT 31H 0204H: Query Protected-Mode Interrupt Vector

INT 31H 0205H: Set Protected-mode Interrupt Vector

INT 31H 0210H: Query Exception Handler Vector (Prot. Mode)

INT 31H 0211H: Query Exception Handler Vector (Real Mode)

INT 31H 0212H: Set Exception Handler Vector (Prot. Mode)

INT 31H 0213H: Set Exception Handler Vector (Real Mode)

INT 31H 0300H: Simulate Real Mode Interrupt

INT 31H 0301H: Simulate Real Mode FAR CALL

INT 31H 0302H: Simulate Real Mode CALL for IRET

INT 31H 0303H: Allocate Real-mode Callback Address

INT 31H 0304H: Free Real-mode Callback Address

INT 31H 0305H: Query State Save/Restore Addresses

INT 31H 0306H: Query Raw Mode-Switch Address

INT 31H 0400H: Query DPMI Version

INT 31H 0401H: Query DPMI Capabilities

INT 31H 0500H: Query Free Memory Information

INT 31H 0501H: Allocate Memory Block

INT 31H 0502H: Free Memory Block

INT 31H 0503H: Resize Memory Block

INT 31H 0504H: Allocate Linear Memory Block

INT 31H 0505H: Resize Linear Memory Block

INT 31H 0506H: Query Page Attributes

INT 31H 0507H: Set Page Attributes

INT 31H 0508H: Map Device in Memory Block

INT 31H 0509H: Map Conventional Memory in Memory Block

INT 31H 050aH: Query Memory Block Size and Base

INT 31H 050bH: Query Memory Information

INT 31H 0600H: Lock Linear Region

INT 31H 0601H: Unlock Linear Region

INT 31H 0602H: Mark Real-Mode Region as Pageable

INT 31H 0603H: Relock Real-Mode Region

INT 31H 0604H: Query Page Size

INT 31H 0700H: Mark Page as Demand-Paging Candidate

INT 31H 0701H: Discard Page Contents

INT 31H 0800H: Physical Address Mapping

INT 31H 0801H: Free Physical Address Mapping

INT 31H 0900H: Query and Disable Virtual Interrupt State

INT 31H 0901H: Query and Disable Virtual Interrupt State

INT 31H 0902H: Query Virtual Interrupt State

INT 31H 0a00H: Get Vendor-Specific API Entry Address

INT 31H 0b00H: Set Debug Watchpoint

INT 31H 0b01H: Clear Debug Watchpoint

INT 31H 0b02H: Query State of Debug Watchpoint

INT 31H 0b03H: Reset Debug Watchpoint

INT 31H 0c00H: Setup DPMI TSR Callback

INT 31H 0c01H: Protected-Mode Terminate and Stay Resident

INT 31H 0d00H: Allocate Shared Memory

INT 31H 0d01H: Free Shared Memory

INT 31H 0d02H: Serialize on Shared Memory

INT 31H 0d03H: Free Serialization on Shared Memory

INT 31H 0e00H: Query Coprocessor Status

INT 31H 0e01H: Set Coprocessor Emulation

                                                     INT 33H: Mouse Support

INT 33H 0000H: Reset/Query Installed State

INT 33H 0001H: Show Mouse Pointer

INT 33H 0002H: Hide Mouse Pointer

INT 33H 0003H: Query Position / Button Status

INT 33H 0004H: Set Mouse Pointer Position

INT 33H 0005H: Query Button-Pressed Counter

INT 33H 0006H: Query Button-Released Counter

INT 33H 0007H: Set Horizontal Range

INT 33H 0008H: Set Vertical Range

INT 33H 0009H: Set Graphics Pointer Shape

INT 33H 000aH: Set Text Pointer Mask

INT 33H 000bH: Query Motion Distance

INT 33H 000cH: Set Mouse Event Handler

INT 33H 000dH: Enable Lightpen Emulation

INT 33H 000eH: Disable Lightpen Emulation

INT 33H 000fH: Set Pointer Speed

INT 33H 0010H: Set Exclusion Area

INT 33H 0013H: Set Speed-Doubling Threshold

INT 33H 0014H: Exchange Mouse Event Handler

INT 33H 0015H: Query Size of Mouse Status Buffer

INT 33H 0016H: Save Mouse Status

INT 33H 0017H: Restore Mouse Status

INT 33H 0018H: Set Alternate Event Handler

INT 33H 0019H: Query User Alternate Event Handler

INT 33H 001aH: Set Mouse Sensitivity

INT 33H 001bH: Query Mouse Sensitivity

INT 33H 001cH: Set Inport Mouse Interrupt Rate

INT 33H 001dH: Set Mouse Display Page

INT 33H 001eH: Query Mouse Display Page

INT 33H 001fH: Deactivate Mouse Driver

INT 33H 0020H: Reenable Mouse Driver

INT 33H 0021H: Reset Mouse Driver

INT 33H 0024H: Query Mouse Type/Driver Version/IRQ#

INT 40H: Diskette BIOS Revector

INT 41H and INT 46H: Hard Disk Parameter Pointers

INT 43H: EGA/VGA Graphics Character Font Pointer

INT 4aH: User Alarm Handler

                                                              EMM Functions

INT 67H 4000H: Get EMM Status

INT 67H 4100H: Get Frame Segment Address

INT 67H 4200H: Get EMS Memory Total / Available

INT 67H 4300H: Open EMM Handle and Allocate Memory

INT 67H 44xxH: Map Memory into Page Frame

INT 67H 4500H: Close EMM Handle and Free Memory

INT 67H 4600H: Get EMM Version Number

INT 67H 4700H: Save Mapping Context

INT 67H 4800H: Restore Mapping Context

INT 67H 4b00H: Count Handle's Pages

INT 67H 4c00H: Count Active Handles

INT 67H 4d00H: Get Page Information For All Handles

INT 67H 4exxH: Get/Set Entire Page Map

INT 67H 4fxxH: Get/Set Partial Page Map

INT 67H 50xxH: Map/Unmap Multiple Pages

INT 67H 5100H: Resize EMS Handle

INT 67H 52xxH: Get/Set Handle Attribute

INT 67H 53xxH: Get/Set Handle Name

INT 67H 54xxH: Find Named Handle

INT 67H 55xxH: Alter Page Map and JMP

INT 67H 56xxH: Alter Page Map and CALL

INT 67H 57xxH: Move/Exchange Memory

INT 67H 58xxH: Get Mappable Physical Address Array

INT 67H 59xxH: Get Hardware Configuration

INT 67H 5axxH: Allocate Standard or Raw Pages

INT 67H 5bxxH: Alternate Map Register Set

INT 67H 5c00H: Prepare for warm boot

INT 67H 5dxxH: Enable/Disable OS Function Set Functions

INT 70H: Real-Time Clock Interrupt Handler

See Also: API Index

DOS Fns QuickRef   by Number   by DOS Version  Obsolete Fns

DOS Interrupts

Service Groups

General Index

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