API Index

 TECH Help! covers the following programming "toolboxes", often called
 Application Programming Interfaces or APIs:

     BIOS Functions             all system interrupts
     DOS Functions              DOS file system, memory, devices, etc.

     APM API                    power management services
     Append Services            when DOS Append command is resident
     AT Keyboard Functions      command codes for the keyboard controller
     Device Driver Requests     installable device drivers
     Doskey Services            when DOSKEY.COM is resident
     DoubleSpace API            control drive IDs, unmount, CVF layout
     DPMI Services              DOS Protected Mode Interface services
     EMM Services               expanded Memory Manager services
     FaxBIOS                    discussed in overview only
     HMA Sub-Allocations        allocate memory in the HMA when DOS=HIGH
     IOCTL Functions            DOS fn 44H control of devices
     Keyb Services              when KEYB.COM is resident
     Mouse Support              when mouse support has been installed
     MRCI API                   Microsoft Real-Time Compression services
     Mscdex Services            CD-ROM services
     Multiplex Interrupt        INT 2fH portal to various APIs
     Print Spooler Services     when PRINT.EXE is resident
     Task Switcher API          DOS Shell services and notifications
     VESA/SVGA Services         SuperVGA services with compliant BIOS
     Video Services             all INT 10H services
     Windows 386Enh Services    used when in a DOS session under Windows
     Windows Clipboard Access   used when in a DOS session under Windows
     Windows VM-aware VDD fns   screen save/restore under 386Enh mode
     XMS Services               extended Memory services (HIMEM.SYS)
                                              Service Groups   TECH Topics