NuBus

E38948

computer bus standard expansion bus

NuBus is a 32-bit, processor-independent expansion bus standard widely used in late-1980s and early-1990s workstations and personal computers, including many Apple Macintosh systems.

Statements (52)

Predicate	Object
instanceOf	computer bus standard → expansion bus →
addressSpaceWidth	32-bit →
bitWidth	32-bit →
connectorType	96-pin Eurocard-style connector →
dataPathWidth	32-bit →
hasIEEEStandardNumber	IEEE 1196 →
influenced	later plug-and-play bus designs →
isEndiannessAgnostic	true →
isProcessorIndependent	true →
isSelfConfiguring	true →
maximumTheoreticalBandwidth	about 40 MB/s at 20 MHz →
standardizedBy	IEEE →
supportsAutoConfiguration	true →
supportsBigEndianSystems	true →
supportsBusMastering	true →
supportsBusSpeed	10 MHz → 20 MHz →
supportsByteAddressing	true →
supportsLittleEndianSystems	true →
supportsMultipleBusMasters	true →
supportsPlugAndPlayLikeConfiguration	true →
uses	asynchronous bus protocol → memory-mapped I/O addressing →
wasAdoptedBy	Apple Computer → NeXT → Symbolics → Texas Instruments →
wasDevelopedAt	Massachusetts Institute of Technology →
wasDevelopedForProject	NuMachine →
wasEventuallySupersededBy	PCI →
wasInitiallyDesignedBy	Gordon Bell → Howard W. Johnson → Wesley A. Clark →
wasPopularInDecade	1980s → 1990s →
wasStandardizedInYear	1987 →
wasUsedIn	Apollo/HP workstations → Apple Macintosh Centris 650 → Apple Macintosh II → Apple Macintosh IIci → Apple Macintosh IIcx → Apple Macintosh IIfx → Apple Macintosh IIx → Apple Macintosh Quadra series → Apple Macintosh Workgroup Server models → NeXTcube → NeXTstation Turbo Color → Symbolics 3600-series workstations → Texas Instruments Explorer II →
wasWidelyUsedIn	personal computers → workstations →

Referenced by (5)

Subject (surface form when different)	Predicate
Macintosh II → Quadra series →	busArchitecture
Macintosh II series →	bus
Macintosh Quadra →	busType
LC Processor Direct Slot →	replacedBy