Zilog Z80380 - Manual (Page 104)

Glossary
Glossary-2 UM004001-COR1103
Bit A digit of a binary system. It has only two possible
values: 0 or 1.
BPS Bits Per Second. Number of binary digits transmitted
every second during a data-transfer procedure.
Buffer Storage Area in Memory.
Bug A defect or unexpected characteristic or event.
Bus In Electronics, a parallel interconnection of the internal
units of a system that enables data transfer and
control Information.
Byte A collection of four sequential bits of memory. Two
sequential bytes (8 bits) comprise one word.
CALL This command invokes a subroutine
Checksum A field of one or more bytes appended to a block of n
words which contains a truncated binary sum formed
from the contents of that block. The sum is used to
verify the integrity of data in a ROM or on a tape.
COM Device name used to designate a communication
port.