INT 21 U - DOS 4+ - COMMIT FILE
AH = 6Ah
BX = file handle
Return: CF clear if successful
AH = 68h
CF set on error
AX = error code (06h) (see AH=59h)
Note:   identical to AH=68h in DOS 5.0; not known whether this is the case in
DOS 4.x

See also: 2168

216A - DOS 4+ - COMMIT FILE