INT 21 - DOS 4.x only - SET EXTENDED ATTRIBUTES AX = 5704h BX = file handle ES:DI -> EAV list (see #01670) Return: CF clear if successful CF set on error AX = error code (see #01680) Note: the default DOS 4 behavior is to do nothing and return successfully; this functionality was apparently never released to the public SeeAlso: AX=5702h,AX=5703h,INT 2F/AX=112Dh