Epson 4100 manual Mapping Characters, Data Byte Action Map, Control Code Map

146 Universal Control Commands

MAPPING CHARACTERS

The commands in this subsection enable you to map a printable character to each data byte value between 0 and 255, to select a character from ROM (permanent memory), or to download and select a character from RAM (temporary memory).

Mapping a character to a data byte value re-assigns the action the printer takes when it receives a data byte with that value.

For example, if you map the letter "A" to data byte value 33, normally associated with the exclamation mark, "!", then each time the printer receives that data byte value, an "A" is printed.

Note: Remapping characters does not affect their use in control commands.

Current settings for all data byte values are stored in the data byte map. The data byte map is a group of five maps in printer memory that describe the action the printer performs when it receives a data byte. These maps are described below:

Data Byte Action Map	Describes whether each data byte
	value between 0 and 255 is
	interpreted as a control code or a
	printable character.
Control Code Map	Describes the control codes currently
	assigned to data byte values between
	0 and 255.