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- VAXBI_Bus abstract "The VAXBI bus (VAX Bus Interconnect bus) was a computer bus designed and sold by the Digital Equipment Corporation (DEC) of Maynard, Massachusetts.The bus was an advanced, configuration-free synchronous bus used on DEC's later VAX computers. Like the Unibus and Q-Bus before it, it used memory-mapped I/O but had 32-bit address and data paths. The VAXBI was a multiplexed bus with fully distributed arbitration and geographic addressing.All of the logic required to implement a VAXBI interface was contained within a single custom integrated circuit (the "BIIC") and the physical layout and printed wiring board layup for compliant cards was tightly specified, right down to the location of the dual amber status LEDs that were required. The portion of the card that was reserved for the bus interface was referred to as "the VAXBI corner". VAXBI licensees were given the appropriate engineering drawings to allow them to exactly replicate a compliant card. VAXBI cards mounted into backplanes using a ZIF connector; depending on the backplane design, cards could be loaded from the top or the front side of the backplane. No cable connections were permitted on the cards; all connections were made via three uncommitted rows of backplane connectors. Similarly, no configuration jumpers were permitted on the cards; all setup was done by jumpers inserted on the backplane connectors or via software configuration.Originally conceived by its engineers to be an open bus, it was forced to be a tightly licensed bus by Digital's marketing and management, and was not nearly as successful as had originally been hoped-for.It was used in the VAX 6000, VAX 8000 (82xx, 83xx, 85xx, 87xx, 88xx models) and the VAX 9000 systems.A PDP-11 implementation (the PDP-11/27) was also envisioned but never advanced beyond the concept stage.".
- VAXBI_Bus thumbnail DEC-VAX-T1019-ECC-memory.jpg?width=300.
- VAXBI_Bus wikiPageID "1648587".
- VAXBI_Bus wikiPageRevisionID "539733449".
- VAXBI_Bus fullname "VAX Bus Interconnect bus".
- VAXBI_Bus hasPhotoCollection VAXBI_Bus.
- VAXBI_Bus inventDate "~1986".
- VAXBI_Bus inventName Digital_Equipment_Corporation.
- VAXBI_Bus name "VAXBI bus".
- VAXBI_Bus width "32".
- VAXBI_Bus subject Category:Computer_buses.
- VAXBI_Bus subject Category:DEC_hardware.
- VAXBI_Bus subject Category:Minicomputers.
- VAXBI_Bus type Artifact100021939.
- VAXBI_Bus type Computer103082979.
- VAXBI_Bus type Device103183080.
- VAXBI_Bus type DigitalComputer103196324.
- VAXBI_Bus type Instrumentality103575240.
- VAXBI_Bus type Machine103699975.
- VAXBI_Bus type Minicomputer103770224.
- VAXBI_Bus type Minicomputers.
- VAXBI_Bus type Object100002684.
- VAXBI_Bus type PhysicalEntity100001930.
- VAXBI_Bus type Whole100003553.
- VAXBI_Bus comment "The VAXBI bus (VAX Bus Interconnect bus) was a computer bus designed and sold by the Digital Equipment Corporation (DEC) of Maynard, Massachusetts.The bus was an advanced, configuration-free synchronous bus used on DEC's later VAX computers. Like the Unibus and Q-Bus before it, it used memory-mapped I/O but had 32-bit address and data paths.".
- VAXBI_Bus label "VAXBI Bus".
- VAXBI_Bus sameAs m.05khpg.
- VAXBI_Bus sameAs Q17132128.
- VAXBI_Bus sameAs Q17132128.
- VAXBI_Bus sameAs VAXBI_Bus.
- VAXBI_Bus wasDerivedFrom VAXBI_Bus?oldid=539733449.
- VAXBI_Bus depiction DEC-VAX-T1019-ECC-memory.jpg.
- VAXBI_Bus isPrimaryTopicOf VAXBI_Bus.