Epson 4100 manual Only Memory

ELECTRONICALLY PROGRAMMABLE READ

G-6 Glossary

READ ONLY MEMORY (ROM). The printer's permanent memory. For the 4100 printer, ROM is the same as

ONLY MEMORY.

SERIAL INTERFACE. Physical and logical connection between devices where data are transmitted one bit at a time.

STOP BITS. The number of bits that define the end of (or space between) each serial interface byte.

SUBSCRIPT. Used to print characters slightly lower on a line than the baseline text around them. This option is set using the configuration menu or with a control command. Subscript characters are sometimes referred to as descenders.

SUPERSCRIPT. Used to print characters slightly higher on a line than the baseline text around them. This option is set using the configuration menu or with a control command. Superscript characters are sometimes referred to as ascenders.

WAIST LINE. The imaginary horizontal line that is the height of the top of a lower case “x” that divides tall and upper case characters. For example, "h," "d," "A," and the like have ascender attributes because part of these characters rise above the waist line, whereas "a," "c," "p," and the like do not.

X-ON/X-OFF. A software handshaking protocol in which a receiving device controls data flow using the content of data itself. X-OFF and X-ON are control characters which signal the sending device to stop or resume data transmission.