Zilog Z80380 Manual do Utilizador descarregar pdf (Página 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.

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