Epson 4100 manual Source Character Library Type of Character, Rom, Ram

58 Configuration

Source: This is the memory source of the character or control code. The two possibilities are ROM and RAM:

•ROM stands for read only memory which is permanent memory.

•RAM stands for random access memory which is temporary memory. Character and control codes residing in RAM are lost when the printer is turn off. (See "Character Library" which follows.)

Character Library. Always Character Library 0 if the source is RAM. For ROM there are two possibilities (Character Libraries 0 and 1). The source/character library combinations are listed below:

Source	Character Library	Type of Character
ROM	0	Any built-in character
		except an OCR B
		Character
ROM	1	OCR B Character
RAM	0	Downloaded Character

Character Number. Each character within a character library is assigned a number. (Appendix D contains more detail on this.)

Character. The actual printable character presently assigned from a character library. The character is printed for that data byte if the printer action is set to CHAR.