Nubus

What is Nubus?

Definition and meaning of Nubus

A NuBus is a 32-Bit parallel pc bus. It became created by means of the Massachusetts Institute of Technology and originated from the NuMachine pc Assignment, which designed Workstations to Interface with LANs the use of Microprocessors. The MIT laboratory group for the NuMachine labored in Collaboration with Western Digital.

The original Nubus and NuMachine were designed for the Western Union NuMachine and for the Lisp Machines Incorporated LMI-Lambda. The NuMachine became utilized in Components via Texas Instruments, Next, Incorporated (NeXT) and Apple Computer. In 1983 the NuMachine become sold by means of Texas Instruments. It become replaced by means of the TI Explorer in 1985.

At the time, Nubus turned into taken into consideration a Great development, due to the fact that most Computer interfaces used an eight-bit bus. Today, Nubus is now not used and turned into replaced frequently through the Peripheral element Interconnect (PCI) and different parallel buses.

What Does Nubus Mean?

The Nubus card uses pins in preference to an aspect connector, that is used on a PCI or enterprise trendy architecture card.

Not only did the Nubus introduce a 32-bit bus, however it had an ID shape allowing playing cards to be recognized by means of the Host at some stage in booting. At the time, the majority of buses used pins on the CPU, which linked to the Backplane. This structure corresponded to statistics requirements and Signaling, which Protected configuring the reminiscence and the cardboard, Interrupts and other time consuming duties. In fact, Nubus become one of the first plug-and-play designs.

However, the Nubus structure required a Controller Chip among the I/O chips on the card and the bus. This scheme required extra price and complexity as compared to the easy bus structures supported through minimum I/O chips.

Nubus playing cards may be designed as both a master or slave. A master manages bus requests for bus mastery and might steady the bus from Access by different Nubus gadgets for an allotted time. The slave responds to requests, transmits non-master requests and does not need guide for the complete 32-bit Switch.

A 24-bit Nubus card is applied at the Macintosh II series. It is referred to as a 24-bit Aliasing and helps cope with lines zero to 23. Nubus become additionally chosen for NeXT Computer Modules, but it had a special Printed Circuit Board design.

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