Commodore 128D - Page 403

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Bubble Memory: A relatively new type of computer memory, it uses
tiny magnetic "pockets" or "bubbles" to store data.
Burst Mode: A special high speed mode of communication
between a disk drive and a computer, in which information is
transmitted at many times normal speed.
Bus: Parallel lines used to transfer signals between devices. Com
puters are often described by their bus structure (i.e., S-100-bus
computers, etc.).
Bus Network: A system in which all stations or computer devices
communicate by using a common distribution channel or bus.
Byte: A group of eight bits that make up the smallest unit of address
able storage in a computer. Each memory location in the Com
modore 128 contains one byte of information. One byte is the
unit of storage needed to represent one character in memory.
See Bit.
Carrier Frequency: A constant signal transmitted between commu
nicating devices that is modulated to encode binary
information.
Character: Any symbol on the computer keyboard that is printed on
the screen. Characters include numbers, letters, punctuation
and graphic symbols.
Character Memory: The area in Commodore 128's memory which
stores the encoded character patterns that are displayed on
the screen.
Character Set: A group of related characters. The Commodore 128
character sets consist of: upper-case letters, lower-case letters
and graphic characters.
Character String Code: The numeric value assigned to represent a
Commodore 128 character in the computer's memory.
Chip: A miniature electronic circuit that performs a computer opera
tion such as graphics, sound and input/output.
Clock: The timing circuit for a microprocessor.
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GLOSSARY