Appendix C

 

communicate properly, a printer must be configured

 

to operate at the same baud rate as its host

 

computer.

bit

Contraction of binary digit. A bit is a digit in the binary

 

number system, represented by a 0 or a 1. A bit is

 

the smallest unit of storage in a digital computer,

 

where 0 and 1 are represented by different voltages.

 

Groups of bits form other units of storage called

 

nibbles, bytes, and words.

bold

A print attribute specifying text of a heavy line

 

thickness. See also character weight.

Boot-up

The start-up procedure which causes a computer

 

operating system to be loaded into main memory.

buffer

A reserved area in memory that data is written to and

 

read from during data transfers.

bus

A circuit for the transfer of data or electrical signals

 

between two devices.

byte

A group of consecutive bits forming a unit of storage

 

in a digital computer and used to represent one

 

alphanumeric character. A byte usually consists of 8

 

bits, but may contain more or fewer bits, depending

 

on the computer or protocol.

 

C

character cell

The invisible rectangular space occupied by a

 

character, including the white space around the

 

character. The height of a cell remains constant even

 

with changes in the current line spacing, and the

 

width is equal to the current character spacing. Used

 

as a unit of spacing.

character proportion

The ratio of character height to character width. See

 

also compressed and expanded.

character set

A set of codes, each of which represents a control or

 

printable character, including symbols, punctuation,

 

numbers, diacritical markings, and alphabet

 

characters. Each character is assigned a unique

 

address in memory.

character weight

The degree of lightness and thickness of printed text.

 

For example: “Bold” refers to a heavy or thick

 

character weight, as shown in this sentence.

 

“Medium,” “normal,” or “book weight” refer to the

 

character weight used in this sentence.

checksum

A value used to verify microcode correctness.

coax

Coaxial cable. An electrical signal conductor

 

consisting of a single wire surrounded by insulation

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Printronix ANSI Printer manual For example Bold refers to a heavy or thick, Character weight, as shown in this sentence