🚀 go-pugleaf

I am using a Nec LC890 with version 47.0 of the postscript interpreter.
The Adobe NEC__470.PPD file for this printer specifies that

                *ImageableArea Letter: "24 16 599 776"
               
I infer that this allows me to draw an image within an area such that the
lower left corner is at (24,16) and the upper right corner is at (599,776). 

If I use these coordinates to draw a box, I find that the right margin is
missing. If I place Courier 10 pitch / 12 point text in this area, I
print only 79 characters on a line - rather than the expected 80 characters.

If I use the coordinates (18,15) and (593,777), the box image is correct
and I can print Courier with 80 characters on a line.

Does this imply that the imageable area is really:

		*ImageableArea Letter: "18 15 593 777"

and that the .PPD file is invalid?    Am I doing something wrong??

The code used to generate my test box is:

	%!PS-Adobe-
	%%EndProlog
	%%Page: ? 0
	/pg save def
	/Courier findfont 12 scalefont setfont
	.01 setlinewidth
	18   15 moveto
	593  15 lineto
	593 777 lineto
	18  777 lineto
	closepath
	stroke
	showpage pg restore
	%%Trailer


Thanks...   tony...