Canon BJ-230 - Manual (Page 87)

Epson LQ Command Summary
You can use the control codes listed in the following tables when the
printer is in LQ mode; that is, when DIP switch 12 is set to ON.
Basic Control Codes
Multilingual
Code Page
850
All
Characters
Chart
NOTE: Because of hardware differences, the justification code, ESC
a, and the perforation skip codes, ESC M and ESC N, are not
supported by your printer. Also, they styles of block graphics
characters at 12 cpi are different from normal Epson LQ 510 printing.