Int 21/AX=4459h

AX = 4459h
CL = function (see #04019 at INT E0"CP/M-86")
DS,DX = parameters

Notes: DR DOS 5.0 and Novell DOS 7 return CF set and AX=0001h. This API is also available on INT E0

See Also: AX=4452h - INT E0"CP/M-86"