INT 21 - DOS 5 - QUERY IOCTL DEVICE                      

Input

DOS1 N DOS2 N

DOS4

N DOS5 Y

Output

AX

44h 11h Error Code AX

BX

  Drive (0=Def)     BX

CX

Category Code Function Code     CX

 

        DX

DS:DX

 Parameter Block Set if Error CF
        Uses the same layout as the GENERIC call. Programs can use this
        function to determine if a device can support a GENERIC call.


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