Ok, it is probably a tria or xylog interface then. If I recall(been 15 years or so) F1 is defult face. F2, F3, F4, and F5 are the rectangular edges that need to be called on a block first to make them active. I believe F3 is the right face. Like any drilling, B starts the command for drilling. X is the location from the bottom of the panel. If you want to drill in the center of the panel of a 19mm thick panel 100mm in the y axis and 10mm deep it would be
B X9.5 Y100 Z10 followed by the drill # of the horizontal. On my old machine, I think 59. Works the same way on F2 which I believe is the left face. On F4 and F5, the front and back side of the panel, the X axis is the X axis, the Y axis becomes the distance from the bottom of the panel to the drill center and the z axis is the depth. Play around with it, you will see from the graphics help if it is ok. It has been a very long time, but I think I have the basics right. Call the face, then bore the hole with the appropriate drill # and you are good to go. Once you figure out the format, it is a very easy machine to write programs for on the fly.