HP 5961-0509 manual Example Using the AT Command, Reset the printer

zIf the end point is the same as the current pen location, a circle is drawn, with its diameter being the line from the current pen position to the intermediate point.

zIf the current pen position, intermediate point, and end point are collinear, a straight line is drawn.

zIf the intermediate point does not lie between the current pen location and the end point, and the three points are collinear, two lines are drawn; one from the current pen location and the other from the end point, leaving a gap between them. Refer to the following illustration. Both lines extend to the PCL Picture Frame limits or current window.

Figure 20-11

Table 20-10 Example: Using the AT Command

ECE	Reset the printer.
EC%ØB	Enter HP-GL/2 mode.
IN;	Initialize HP-GL/2 mode.
SP1;	Select pen number 1 (black).
PA1000,100;	Specify (1000,100) as the starting
PD2500,100;	location, place the pen down, and
	draw a line to (2500,100).
PU650,1150;	Lift the pen, move to (650,1150),
PD1000,1150;	place the pen down, and draw a line
	to (1000,1150).

EN AT, Absolute Arc Three Point 20-17