🚀 go-pugleaf

Perhaps someone can help me with a Laserwriter problem I have been having:-
We have several laser printers (original Laserwriters, IINTXs, Agfa P3400)
and I know that they all have slightly different imaging areas, both in 
terms of size and origin. Recently we had an old Laserwriter go faulty and
it was replaced with a similar machine, but apparently one with a later
version of the firmware. (This was an Apple printer, badged by Sun).
The Postscript coordinates of the imaging area on this printer seemed to be
about 1/2 inch lower than the original printer which conformed to the
figures given in the red book.

I would guess that maybe the new firmware understands the A4 paper we are
using, even though it is incapable of printing on all of it (or is it?!)
The old one took A4 paper in the tray, but only printed on a "letter" sized
area towards the top of the paper.

Is this a feature of the firmware version?
Are the new coordinates of the imaging area documented anywhere?
Am I likely to find another version of the firmware with different coordinates
again?

(This is not an question of "setmargins" BTW. The imaging area is still in the
same place on the page - it is the Postscript origin which seems to have
moved)

Any comments or pointers to documentation would be welcome.

Paul Anderson                      JANET: paul@uk.ac.ed.lfcs
LFCS, Dept. of Computer Science    UUCP:  ..!mcvax!ukc!lfcs!paul	
University of Edinburgh            ARPA:  paul%lfcs.ed.ac.uk@nsfnet-relay.ac.uk
Edinburgh EH9 3JZ, UK.             Tel:   031-667-1081 Ext 2788