DM642第三通道视频显示，此程序为合众达给的例程改变的-DM642 third channel video display, as the Triangle of this program change to the routine

此程序为根据合众达DM642所给的例程改变的第四通道视频显示程序-This program is under the Triangle given up to DM642 routine change of the fourth channel video display program