Family API

Family API (FAPI) is a subset of function calls for development of OS/2 protected mode and real mode programs.

OS/2 1.0 introduced 91 function calls that could be used in FAPI programs.

Function Calls

Dos

• BadDynLink
• DosBeep
• DosChDir
• DosChgFilePtr
• DosClose
• DosCreateCSAlias
• DosDelete
• DosDevConfig
• DosDupHandle
• DosFreeSeg
• DosGetDateTime
• DosGetEnv
• DosGetHugeShift
• DosGetMachineMode
• DosGetMessage
• DosGetVersion
• DosInsMessage
• DosMkDir
• DosMove
• DosNewSize
• DosPutMessage
• DosQCurDir
• DosQCurDisk
• DosQFileMode
• DosQFSInfo
• DosQVerify
• DosRmDir
• DosSelectDisk
• DosSetDateTime
• DosSetFileInfo
• DosSetFileMode
• DosSetVerify
• DosSleep
• DosSubAlloc
• DosSubFree
• DosSubSet
• DosWrite

Restricted

• DosAllocHuge
• DosAllocSeg
• DosCaseMap
• DosCWait
• DosDevIOCtl
• DosError
• DosExecPgm
• DosExit
• DosFileLocks
• DosFindClose
• DosFindFirst
• DosFindNext
• DosGetCtryInfo
• DosGetDBCSEv
• DosGetSpecChar
• DosHoldSignal
• DosOpen (FAPI)
• DosQFileInfo
• DosRead (FAPI)
• DosReallocHuge
• DosReallocSeg
• DosSetCtryCode
• DosSetFHState
• DosSetSigHandler

Kbd

• KbdCharIn
• KbdFlushBuffer
• KbdGetStatus
• KbdInit
• KbdRegister
• KbdSetStatus
• KbdStringIn

Restricted

• KbdPeek

Vio

• VioGetBuf
• VioGetCurPos
• VioGetCurType
• VioGetPhysBuf
• VioReadCellStr
• VioReadCharStr
• VioScrollDn
• VioScrollLf
• VioScrollRt
• VioScrUnLock
• VioSetCurPos
• VioSetCurType
• VioSetMode
• VioShowBuf
• VioWrtCellStr
• VioWrtCharStr
• VioWrtCharStrAtt
• VioWrtNAttr
• VioWrtNCell
• VioWrtNChar
• VioWrtTTY

Restricted

• VioScrLock

Limitations

Real Mode

max. 640K memory

no virtual address space

no multitasking

no undocumented OS services

If the filename of an executable produced by BIND is changed, then it will not run under DOS 2.1.

Protected Mode

16 MB memory

1GB virtual address space

Article

• Roger Orr: Hints for writing simple programs for both OS/2 and DOS