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Topic: Computer bus


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In the News (Wed 20 Mar 19)

  
  Bus (computer) - MSN Encarta
In computer architecture, a bus is a subsystem that transfers data between computer components inside a computer or between computers.
Bus (computer), in computer science, a set of wires used for data transfer among the components of a computer system.
Because the bus is integral to internal data transfer and yet computer users often need to add extra components to the system, most microcomputer buses allow for expansion through one or more expansion slots (connectors for add-on circuit boards).
encarta.msn.com /encyclopedia_761552366/Bus_(computer).html   (591 words)

  
 Method and system for avoiding live lock conditions on a computer bus by insuring that the first retired bus master is ...
The bus controller may prevent execution of the transaction request from the other bus masters by transmitting retry commands to all bus masters that submit transaction requests after the transaction request from the first bus master is received and before the first bus master re-submits the transaction request.
The computer system of claim 14 wherein the bus controller includes a bus interface and a buffer associated with the target device, the bus interface determining whether the target device is available to execute the first transaction request by determining whether the buffer is in a state that enables execution of the first transaction request.
Bus master 1 re-submits its second read transaction request and the PCI target interface processes it normally because the write buffer is still empty and the bus master 1 no longer has an ineligible flag associated with it.
www.freepatentsonline.com /6141715.html   (6177 words)

  
  Computer bus: Definition and Links by Encyclopedian.com
In computer architecture a bus is a subsystem that transfers data or power between computer components inside a computer or between computers.
Early computer buses were literally parallel electrical buses with multiple connections, but the term is now used for any physical arrangement that provides the same logical functionality as a parallel electrical bus.
An internal bus connects all the internal components of a computer to the motherboard (and thus, the CPU and internal memory).
www.encyclopedian.com /co/Computer-bus.html   (1527 words)

  
 Lesson 2: The Computer Bus
Remember, in a computer, a bus is a set of parallel wires or lines to which the CPU, the memory, and all input/output devices are connected.
When we speak of buses within a computer (data bus, expansion bus, or address bus), we are speaking of a specific number of wires dedicated to a specific purpose – connecting parts of the computer to each other for the exchange of data between components.
A bus is the physical means by which data is made to move inside a computer.
www.geocities.com /lacereza06/bus.htm   (1010 words)

  
 Computer Bus
In computer architecture, a bus is a subsystem that transfers data or power between computer components inside a computer or between computers.
Early computer buses were literally parallel electrical buses with multiple connections, but the term is now used for any physical arrangement that provides the same logical functionality as a parallel electrical bus.
An internal bus connects all the internal components of a computer to the motherboard (and thus, the CPU and internal memory).
www.geocities.com /jagathkrishnakumar/computer-bus.html   (730 words)

  
 REMOTE LINKABLE COMPUTER BUS (WO9005331A1)
The computer selects the most reliable bridge for the bus based on the bus bridges available to the computer and a user-determined hierarchy of bus bridges (e.g., traditional telephone line selected in preference to a cellular telephone connection).
The remote linkable bus operates in such a way that the user does not have to change how he or she uses the computer in order to access the entire bus; whether in the office or on the road, the full functionality of the bus is available to the user.
one segment of the bus that resides with the computer's central processing unit (CPU) 14 is referred to as the local bus segment loa of the remote linkable bus.
www.delphion.com /details?pn=WO09005331A1   (644 words)

  
 Hot plug connected I/O bus for computer system - Patent 6070207
Bus expander bridges 80A and 80B are connected to MIOC 100 via expander buses 70A and 70B, respectively.
Bus drivers or transceivers can be disabled by tri-stating their outputs (e.g., for CMOS drivers) or by leaving the transceivers in the undriven state (e.g., for open drain drivers).
Placing the bus system in an operational mode can include for example, enabling the bus drivers in the MIOC 100 and the bus expander bridge 80 (or in the graphics expander bridge 88) and ensuring that bus activity for the new bus system is not quiesced.
www.freepatentsonline.com /6070207.html   (7837 words)

  
 Bus (computer) - Search Results - MSN Encarta
Bus (computer), in computer science, a set of hardware lines—wires—used for data transfer among the components of a computer system.
There are many different layouts (such as bus, star, ring) and a number of different access protocols....
The last segment of a CPU chip or microprocessor is its internal bus, a network of communication lines that connects the internal elements of the...
uk.encarta.msn.com /Bus_(computer).html   (111 words)

  
 HowStuffWorks "How PCI Works"
Essentially, a bus is a channel or path between the components in a computer.
These slower buses connect to the system bus through a bridge, which is a part of the computer's chipset and acts as a traffic cop, integrating the data from the other buses to the system bus.
The backside bus is a separate connection between the processor and the Level 2 cache.
computer.howstuffworks.com /pci.htm   (1452 words)

  
 Computer Forums - bus mastering   (Site not responding. Last check: )
As discussed in the section on system bus functions and features, bus mastering is the capability of devices on the PCI bus (other than the system chipset, of course) to take control of the bus and perform transfers directly.
The PCI bus is the first bus to popularize bus mastering; probably in part because for the first time there are operating systems and software that are really capable of taking advantage of it.
In a way, the PCI bus acts like a tiny "local area network" inside the computer, in which multiple devices can each talk to each other, sharing a communication channel that is managed by the chipset.
www.computerforums.org /showthread.php?t=13914   (374 words)

  
 Smart Bus Information
This "smart" bus was part of a joint project, undertaken by King County Metro and Sound Transit, to evaluate the next generation of on-board bus electronics and data systems.
Using a new, integrated, multi-function computer and communications system, smart buses have on-board capabilities that monitor and report on the operational and maintenance status of the bus, as well as its current location and schedule.
The new smart bus systems are expected to enable Metro and Sound Transit to improve the mechanical and schedule reliability of buses, as well as the service and information provided to riders, as they have in other U.S. cities.
transit.metrokc.gov /prog/smartbus/smartbus.html   (849 words)

  
 Dave's Guide to Buying a Home Computer
The instruction/data bus is the pathway for data communications between the computer's processor and the various components in the computer and is analogous to the buses that run in the city.
By just saying that their computer is essentially the same as the brand name computer, most people assume that all of the specifications associated with the brand name computer apply to the in-house computer and leave it at that.
There are several computer manufacturers that have Web sites, such as Dell and Gateway, that allow you to check the prices of their computer systems, customize the specifications to fit your needs, and then get a bottom line price.
www.css.msu.edu /pc-guide/pc-guide1.cfm   (12336 words)

  
 The Computer Bus
The bus is actually a set of circuits that run throughout the board and connect all the expansion slots, memory, and CPU, etc. together.
The difference is that this bus connects directly to the system bus on the motherboard.
Since the ISA bus is a max of 8mbps, it cannot keep the system bus fully occupied.
www.footefamily.org /train/buses.htm   (761 words)

  
 The System Bus - PC ComputerNotes
Some of the electronic pathways or wires of the Internal Bus or the External Bus are dedicated to moving data.
Your computer has to move information in and out of memory, and it has to keep track of which data is stored where.
The computer knows where all the fishes are, but it has to transmit that information to the CPU and other devices.
www.pccomputernotes.com /system_bus/bus01.htm   (558 words)

  
 Bus
A bus is capable of being parallel or a serial bus and today all computers utilize two types of buses, an internal or local bus and an external bus.
An internal bus enables a communication between internal components such as a computer video card and memory and an external bus is capable of communicating with external components such as a SCSI scanner.
A computer or devices bus speed or throughput is always measured in bits per second or megabytes per second.
www.computerhope.com /jargon/b/bus.htm   (219 words)

  
 The Computer Bus
The Award winning Computer Bus is a project run by Scottish Borders Library Service.
We give FREE introductory computer training to people living in the Scottish Borders who would not otherwise be able to access it.
The computer bus itself, is a vehicle like a mobile library.
www.thecomputerbus.org.uk   (179 words)

  
 Feature - Interface And Bus Glossary
A bus is similar; in fact, you can think of a bus as a data highway connecting different components of your system.
This is a proprietary bus used in early IBM machines as a replacement for ISA.
This type of bus was developed as an alternative to ISA, in order to support the better performance graphics cards of the 486 era.
www.netpanel.com /features/computer/bus.htm   (653 words)

  
 Bus Bars in the Computers Industry - ELDRE Corporation - Buss Bars for Computer Applications
Five laminated layers (three power, two return) conform neatly around the sides of a computer enclosure to provide space saving solutions to power distribution.
Two level (plus and minus) DC power, individually insulated bus bars carry power from the power supply to the backplane.
This laminated bus bar distributes +5V and Return to a backplane in a rack system for a computer application.
www.busbar.com /computer/computer.asp   (136 words)

  
 What is bus? - A Word Definition From the Webopedia Computer Dictionary
This is a bus that connects all the internal computer components to the CPU and main memory.
On PCs, the old ISA bus is being replaced by faster buses such as PCI.
The local bus is a high-speed pathway that connects directly to the processor.
www.webopedia.com /TERM/b/bus.html   (674 words)

  
 Information and help with the computer bus
A computer bus is a method of transmitting data from one part of the computer to another part of the computer.
One of the major downfalls of the MCA bus was it being a proprietary bus and because of competing bus designs.
VLB 2.0 was later released in 1994 and had a 64-bit bus and a bus speed of 50 MHz.
www.computerhope.com /help/bus.htm   (1133 words)

  
 Personal Computer Interface Buses, PC Bus Description and Pinout Definition
The AGP bus was derived from the Parallel PCI bus with a few additional signals.
The EISA bus (in one mode) used both edges of the clock, with the rising edge used to output address, and the falling edge to place the data on the bus.
The PISA bus is used as an Industrial Embedded Computer Bus, not a consumer Personal Computer bus.
www.interfacebus.com /Interface_PC_Buses.html   (5551 words)

  
 What is AT bus? - A Word Definition From the Webopedia Computer Dictionary
The bus, therefore, is the main highway for all data moving in and out of the computer.
The AT bus, which runs at 8 megahertz and has a 16-bit data path, is the de facto standard for PCs.
However, MCA was not accepted by the computer industry because it was not backward compatible with the AT-bus, so IBM has been forced to drop it.
www.webopedia.com /TERM/A/AT_bus.html   (530 words)

  
 Computer Bus
The address bus is a group of lines which are unidirectional, means that bits flow in one direction from the CPU to peripheral devices.
The CPU used the address bus to identify a peripheral from which it devices to access information.
The data bus is a group of lines used for data flow which are bi-directional means that the data can flow in both the direction between, the CPU and the peripherals.
www.ligaturesoft.com /cheap-computers/bus.html   (157 words)

  
 FTCCOM
After the VESA VL-bus design standard became successful and computer manufacturers had sold more than 1.4 million personal computers incorporating the VL-bus, Dell contacted certain VESA members and asserted that it obtained a patent in 1991 that they were violating by using the VL-bus standard, the complaint alleges.
In 1991-92, a VESA committee developed a standard for a computer bus design, which became known as the VESA Local Bus or "VL-bus." The bus carries information or instructions between the computer's central processing unit and peripheral devices.
For purposes of antitrust analysis, it is important to note that the complaint did not allege that Dell's representative to VESA had any knowledge of the coverage of the "481 patent or of the potential infringement by the VL-bus at the time he cast the ballot.
www.gtwassociates.com /answers/ftccom.html   (3364 words)

  
 What is bus? - a definition from Whatis.com
- In a computer or on a network, a bus is a transmission path on which signals are dropped off or picked up at every device attached to the line.
(1) A bus is a network topology or circuit arrangement in which all devices are attached to a line directly and all signals pass through each of the devices.
(2) In a computer, a bus is the data path on the computer's motherboard that interconnects the microprocessor with attachments to the motherboard in expansion slots (such as hard disk drives, CD-ROM drives, and graphics adapters).
searchstorage.techtarget.com /sDefinition/0,,sid5_gci211718,00.html   (248 words)

  
 Enova supplies plug-in technology for school bus project - Computer Business Review
The vehicle is built by IC Corporation, a school bus manufacturer, in collaboration with Enova Systems, a developer of proprietary electric, hybrid and fuel cell digital power management systems, for a nationwide school bus project.
The hybrid school bus features Enova's charge depleting system, which was extensively evaluated at IC Corporation's research and technology facility.
The bus could see up to a 100% fuel economy improvement, as well as a 90% reduction in emissions.
www.computerbusinessreview.com /article_news.asp?guid=0E15B4DE-77DE-4633-8245-6C85ED50AA77   (202 words)

  
 Get On The Vintage Computer Bus
The ISA bus was basically the original AT vintage computer bus.
In addition to the ISA bus, there is typically an auxiliary bus such as the VL-bus or the even more recent and now accepted standard the PCI bus both were designed for video cards so that they could operate at faster speeds.
Another bus called EISA was going to become the industry standard but instead went on to have a life almost exclusively in the server realm.
www.excellentguide.com /article/Computer_Pc/page_1/Get-On-The-Vintage-Computer-Bus.html   (548 words)

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