Int 20  P - Microsoft Windows - Ifsmgr - Vxd Services                      [W]

   VxD = 0040h

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0961,#1032

(Table 1002)
Values for IFSMGR (VxD ID 0040h) service number:
 00h   get version
 01h   "RegisterMount"
 02h   "RegisterNet"
 03h   "RegisterMailSlot"
 04h   "Attach"
 05h   "Detach"
 06h   "Get_NetTime"
 07h   "Get_DOSTime"
 08h   "SetupConnection"
 09h   "DerefConnection"
 0Ah   "ServerDOSCall"
 0Bh   "CompleteAsync"
 0Ch   "RegisterHeap"
 0Dh   "GetHeap"
 0Eh   "RetHeap"
 0Fh   "CheckHeap"
 10h   "CheckHeapItem"
 11h   "FillHeapSpare"
 12h   "Block"
 13h   "Wakeup"
 14h   "Yield"
 15h   "SchedEvent"
 16h   "QueueEvent"
 17h   "KillEvent"
 18h   "FreeIOReg"
 19h   "MakeMailSlot"
 1Ah   "DeleteMailSlot"
 1Bh   "WriteMailSlot"
 1Ch   "PopUp"
 1Dh   "printf"
 1Eh   "AssertFailed"
 1Fh   "LogEntry"
 20h   "DebugMenu"
 21h   "DebugVars"
 22h   "GetDebugString"
 23h   "GetDebugHexNum"
 24h   "NetFunction"
 25h   "DoDelAllUses"
 26h   "SetErrString"
 27h   "GetErrString"
 28h   "SetReqHook"
 29h   "SetPathHook"
 2Ah   "UseAdd"
 2Bh   "UseDel"
 2Ch   "InitUseAdd"
 2Dh   "ChangeDir"
 2Eh   "DelAllUses"
 2Fh   "CDROM_Attach"
 30h   "CDROM_Detach"
 31h   "Win32DupHandle"
 32h   "Ring0_FileIO"
 33h   "Toggle_Extended_File_Handle"
 34h   "IFSMgr_GetDrive_Info"
 35h   "IFSMgr_Ring0GetDriveInfo"
 36h   "IFSMgr_BlockNoEvents"
 37h   "IFSMgr_NetToDosTime"
 38h   "IFSMgr_DosToNetTime"
 39h   "IFSMgr_DosToWin32Time"
 3Ah   "IFSMgr_Win32ToDosTime"
 3Bh   "IFSMgr_NetToWin32Time"
 3Ch   "IFSMgr_Win32ToNetTime"
 3Dh   "IFSMgr_MetaMatch"
 3Eh   "IFSMgr_TransMatch"
 3Fh   "IFSMgr_CallProvider"
 40h   "UniToBCS"
 41h   "UniToBCSPath"
 42h   "BCSToUni"
 43h   "UniToUpper"
 44h   "UniCharToOEM"
 45h   "CreateBasis"
 46h   "MatchBasisName"
 47h   "AppendBasisTail"
 48h   "FcbToShort"
 49h   "ShortToFcb"
 4Ah   "IFSMgr_ParsePath"
 4Bh   "Query_PhysLock"
 4Ch   "_VolFlush"
 4Dh   "NotifyVolumeArrival"
 4Eh   "NotifyVolumeRemoval"
 4Fh   "QueryVolumeRemoval"
 50h   "IFSMgr_FSDUnmountCFSD"
 51h   "IFSMgr_GetConversionTablePtrs"
 52h   "IFSMgr_CheckAccessConflict"
 53h   "IFSMgr_LockFile"
 54h   "IFSMgr_UnlockFile"
 55h   "IFSMgr_RemoveLocks"
 56h   "IFSMgr_CheckLocks"
 57h   "IFSMgr_CountLocks"
 58h   "IFSMgr_ReassignLockFileInst"
 59h   "IFSMgr_UnassignLockList"
 5Ah   "IFSMgr_MountChildVolume"
 5Bh   "IFSMgr_UnmountChildVolume"
 5Ch   "IFSMgr_SwapDrives"
 5Dh   "IFSMgr_FSDMapFHtoIOREQ"
 5Eh   "IFSMgr_FSDParsePath"
 5Fh   "IFSMgr_FSDAttachSFT"
 60h   "IFSMgr_GetTimeZoneBias"
 61h   "IFSMgr_PNPEvent"
 62h   "IFSMgr_RegisterCFSD"
 63h   "IFSMgr_Win32MapExtendedHandleToSFT"
 64h   "IFSMgr_DbgSetFileHandleLimit"
 65h   "IFSMgr_Win32MapSFTToExtendedHandle"
 66h   "IFSMgr_FSDGetCurrentDrive"
 67h   "IFSMgr_InstallFileSystemApiHook"
 68h   "IFSMgr_RemoveFileSystemApiHook"
 69h   "IFSMgr_RunScheduledEvents"
 6Ah   "IFSMgr_CheckDelResource"
 6Bh   "IFSMgr_Win32GetVMCurdir"
 6Ch   "IFSMgr_SetupFailedConnection"
 6Dh   "_GetMappedErr"
 6Eh   "ShortToLossyFcb"
 6Fh   "IFSMgr_GetLockState"
 70h   "BcsToBcs"
 71h   "IFSMgr_SetLoopback"
 72h   "IFSMgr_ClearLoopback"
 73h   "IFSMgr_ParseOneElement"
 74h   "BcsToBcsUpper"

See Also: #1001,#1003