Apple Computer NUbus
Connector Pinout


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This page describes the pinout and signal names for NuBus as used on Apple computers [Macintosh and NeXT Computer].
The NUbus expansion interface is obsolete and should not be used for new designs. NUbus is a 32-bit bus and was defined by IEEE Std 1196-1987.
NuBus was used as an Apple expansion bus with 32 bit address and 32 bit data bus operating at 10MHz, with a throughput of 40MBps.
The NuBus card had a form factor of 12" x 7", and used a standard 96-pin three-row (VME) connector.
NuBus90, increased the clock rate to 20Mhz providing a throughput of 70Mbps. NUbus was replaced by the PCI expansion bus.

Additional pinout tables for other Apple protocols are listed on the Apple Computer Buses page.
A full list of buses found on any computer type is listed on the Personal Computer Buses page.


NuBus Pin outs and Signal Assignments
NuBus Row A Pinout
NuBus Row B Pinout
NuBus Row C Pinout


Nubus was also released by TI in 1983, before it became an IEEE standard. The two are not the same.

Engineering Key words: Apple, Macintosh, MAC, NUbus, Computer Buses, Connector Pin-Outs, Pin out, Signal Name, Standard, Interface Standard,
Specification, Spec, Physical Interface, Description, Personal Computer Interface, Peripheral, Printer Interface, Obsolete, Out-dated, Legacy.

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Last Modified 2/17/08
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