Some MS-DOS API Functions Not Supported With Windows NT

Last reviewed: May 8, 1997
Article ID: Q102058

The information in this article applies to:

Microsoft Windows NT operating system, version 3.1
Microsoft Windows NT Advanced Server, version 3.1

The following MS-DOS application program interface (API) functions are not supported with Windows NT:

INT21H/44h IOCTL subfunction 05,0dh
INT 21H function 52h (undocumented) - offset 12H (pointer to DISK buffer information) is NULL in Windows NT DOS (for this reason INTERLNK.EXE from MS-DOS 6 doesn't work in Windows NT).
INT21H/53h SetDPB
INT13H all subfunctions for hard disks
INT13H following subfunctions for floppy disk drives:
```
      09-14h, 19h-1ah
```

INT15H:

      0-3,0fh,21h,23h,80h-82h,84h,85h,89h,90h,91h,c1h,c2h,c3h,c4h

INT18H (basic)

INT2F following subfunctions

      AX=
      0101h,4b01h,4b02h,4b03h,4b04h,1502,1503,1504,1505,1508,150e,150f

INT33 (mouse)
```
      Ax=10h, Ax=27h-40h.
```
INT67 (EMM) AH=DEh (all subfunctions, VCPI)
task switcher APIs

Additional query words: prodnt
Keywords : kb3rdparty kbinterop ntdosap
Version : 3.1
Platform : WINDOWS

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Last reviewed: May 8, 1997
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