X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21 - dos

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INT 21 - DOS - CREATE A DISK FILE
        AH = 16h
        DS:DX -> FCB (see AH=0Fh)
Return: AL = status
            00h successful creation
            FFh directory full
Note:   if file already exists, it is truncated to zero length
SeeAlso: AH=3Ch

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