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Futurebus (IEEE 896) is a computer bus standard designed to replace all local bus connections in a computer, including the CPU, plug-in cards, and even some LAN links between machines. The project started in 1979 and was completed in 1987, but then went through a redesign until 1994. It has seen little real-world use, although custom implementations are still designed.[1]

History

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In the late 1970s, VMEbus was faster than the parts plugged into it. It can connect a CPU and RAM to VME on separate cards to build a computer. However, as the speed of the CPUs and RAM rapidly increased, Futurebus created a successor to VMEbus using asynchronous links. Though the ability to have several cards in the system as "masters", allowing Futurebus to build multiprocessor machines, required some form of "distributed arbitration" to allow the various cards to gain access to the bus at any point, as opposed to VME, which put a single master in slot 0 with overall control.

Typical IEEE standards start with a company building a device, then submitting it to the IEEE for the standardization effort. In the case of Futurebus, the whole system was being designed during the standardization effort. It took eight years before the specification was finally agreed on in 1987. Tektronix did make a few workstations based on Futurebus.[2] It took another four years for the Futurebus+ Standard to be released. The IEEE 896 committee later split from the IEEE Microcomputer Standards Committee and formed the IEEE Bus Architecture Standards Committee (BASC).

Futurebus+ transceivers that meet the IEEE Standard 1194.1-1991 Backplane Transceiver Logic (BTL) standard are still made by Texas Instruments. Futurebus+ was used as the I/O bus in the DEC 4000 AXP and DEC 10000 AXP systems. Futurebus+ FDDI boards are still supported in the OpenVMS operating system.

See also

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References

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  1. ^ Hardenberg, Hal W. (June 1, 1997). "Back to the Futurebus". drdobbs.com. Dr. Dobb's Journal. Archived from the original on January 28, 2021. Retrieved June 16, 2026.
  2. ^ Marshall, Martin (April 24, 1989). "Tektronix Unveils Family Of Graphics Workstations". InfoWorld.

Further reading

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📚 Artikel Terkait di Wikipedia

Pentium Pro

Pentium Pro bus was influenced by Futurebus (IEEE 896), the Intel iAPX 432 bus, and elements of the Intel i960 bus. Futurebus was intended to replace the 68000-based

DIN 41612

60603-2 and EN 60603-2. DIN 41612 connectors are used in Pancon, STEbus, Futurebus, VMEbus, Multibus II, NuBus, Acorn Archimedes expansion bus, VXI Bus,

Low-voltage differential signaling

and FireWire, both of which trace their development back to the post-Futurebus work, which also led to SCI. In addition, LVDS is the physical layer signaling

System on module

circuits CompactPCI – Computer bus interconnect for industrial computers Futurebus – Universal computer bus standard PCI Mezzanine Card – Printed circuit

VPX

standard from different vendors. CompactPCI CompactPCI Serial VXI PCI-X Futurebus VMEbus "VITA's VPX embedded systems computing standard gets ANSI ratification"

Bus (computing)

eSATA ExpressCard IEEE 1394 interface (FireWire) RS-232 Thunderbolt USB Futurebus InfiniBand PCI Express External Cabling QuickRing Scalable Coherent Interface

VMEbus

by a secondary bus, for example the STEbus. Data acquisition VPX VXS Futurebus CompactPCI CAMAC FPDP List of device bandwidths "VMEbus Technology FAQ

QuickRing

as an offshoot of the fabled Futurebus project, which started in the late 1970s under the aegis of the IEEE. The Futurebus process quickly bogged down