Epson 1000 Reference Manual page 223

Two modes of Epson GL/2
Epson GL/2 mode has two operational modes. One is the
LJ3-GL/2 mode, another is the GL-like mode.
This mode emulates GL/2 mode of the HP LaserJet series
III emulation. While in this mode you can enter GL/2 mode
without sending the ESC %#B (Enter GL/2 mode)
command. If your application software cannot send the
ESC %#B command, then use this mode.
If your application software supports LaserJet series printers,
you do not need to use this mode.
This mode emulates some of the HP-GL
commands. It features all of the commands of the LJ3-GL/2
mode, plus two additional commands.
The table below shows the differences of these modes.
Printable areas
(Picture frame)
Default position of
P1 and P2
Undefined commands
CS, CA commands
Results when the
DT command without
second parameter
is sent
The area of hard-clip limit is on the next page.
l
HP Emulation Mode
B-46
LJ3-GL/2 mode
1/1016 inch
Same as LaserJet Ill
mode
Lower left and
upper right corners
respectively of
picture frame
First character is
ignored
Not supported
Terminator is not
plotted
®
plotter
GL-like mode
1/1021 inch
Depends on the
hard-clip limit'
Inside of picture frame
First two characters
are ignored
Partially supported
Terminator is plotted