ISA bus

E699614

ISA bus is an early IBM PC expansion bus standard that provided a common hardware interface for adding peripheral cards like sound, network, and graphics adapters.

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Statements (49)

Predicate Object
instanceOf computer bus standard
abbreviation ISA NERFINISHED
addressBusWidth 24-bit
backwardCompatibleWith 8-bit ISA NERFINISHED
bitWidth 16-bit
8-bit
category computer hardware interface
clockFrequency 4.77 MHz
8 MHz
commonInEra 1980s
1990s
configurationMethod DIP switches
jumpers
dataTransferType parallel
developedBy IBM NERFINISHED
electricalInterface 5V signaling
extendedFrom IBM PC bus NERFINISHED
extendedWidth 16-bit
fullName Industry Standard Architecture NERFINISHED
graduallyPhasedOutIn late 1990s
hasConnectorType edge connector
hasLimitation low bandwidth
no standardized plug-and-play configuration
shared interrupt lines
hasSignalType TTL
initialWidth 8-bit
introducedInYear 1981
maxAddressableMemory 16 MB
mechanicalKeying separate 8-bit and 16-bit sections
standardizedInYear 1984
standardType de facto standard
stillUsedIn some legacy industrial systems
succeededBy AGP NERFINISHED
EISA NERFINISHED
PCI NERFINISHED
PCI Express NERFINISHED
VESA Local Bus NERFINISHED
supports memory-mapped I/O
port-mapped I/O
supportsBusMastering no (original design)
supportsPlugAndPlay no (original design)
usedFor connecting expansion cards
connecting graphics adapters
connecting network interface cards
connecting sound cards
connecting storage controllers
usedIn IBM PC NERFINISHED
IBM PC/AT NERFINISHED
IBM-compatible personal computers

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

VESA Local Bus predecessor ISA bus