Canon BJ-230 - Manual (Page 69)

Set this switch ON to enable Alternate Graphics Mode (AGM). In this
mode, the printer accepts high-resolution, 24-dot, all-points-addressable
(APA) graphics commands similar to those used with conventional 24-
pin printers.
DIP switch 9
When this switch is OFF, the printer uses IBM USA code page 437.
When this switch is ON, the printer uses IBM Multilingual code page
850. Each code page has three character sets: Set 1, Set 2, and All
Characters Chart. See Appendix C for a sample of each character set.
DIP switch 10
When this switch is OFF, the printer allocates the entire buffer space
(approximately 41.2 KB) to the input buffer. When you are using
downloaded fonts, change this switch to ON; the printer will allocate 40
KB to buffer space for downloaded fonts.
DIP switch 12
When this switch is Off, the printer is in the BJ-10 mode. When this
switch is On, the printer is in Epson LQ mode.
Example
The following DIP switch settings select the specified printer functions
as the defaults:
Epson LQ Mode
When the printer is in Epson LQ mode (DIP switch 12 is ON), you can
set the DIP switches to control the following functions:
DIP switch Function
12 OFF BJ-10 printer control mode
1 ON A4-size paper
4 ON 12-inch page length
7 ON AGM mode enabled
9 ON Code page 850