Epson 8900 Series - Manual (Page 33)

Character Sets and Global Commands 3-2
Introduction
This chapter describes the standard character sets and provides
information about their use in the Model 8900 Series Printers.
The printer can use any of several standard or optional character sets
that can be selected via the operator control panel switches or via the
host computer. These character sets provide all control characters
and graphic characters necessary to implement the various printer
emulation modes.
The standard character sets reside in the printer read-only memory
(ROM), and the optional character sets can be plugged into one of
the option ROM sockets on the printer logic board.
Character Code Table
The following figure shows the printer character code table. The
character code table is an area in the printer memory in which one
8-bit character set or two 7-bit character sets reside.