INT 60 u - HP 95LX System Manager - CREATE OR TRUNCATE FILE
        DI = 0503h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see INT 60/DI=0500h)
                DWORD   pointer to filename
                WORD    length of filename
                WORD    ???
                WORD    suppress buffering if nonzero
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0502h