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| | Information about the computer BUS |
 | | A computer bus is a method of transmitting data from one part of the computer to another part of the computer. | | | The computer bus will connect all devices to the computer | | | One of the major downfalls of the MCA bus was it being a proprietary bus and because of competing bus designs. |
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http://www.computerhope.com/help/bus.htm
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| | The Data Bus/Address Bus |
| | The electrical bus inside the computer is the channel around which addresses and data travel. | | | The "bus" inside a computer is similar to a bus which carries passengers around a city. | | | The data bus is also a collection of wires but this carries instructions and data, not memory addresses. |
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http://www.cs.ualberta.ca/~casey/c101/101notes/bus.html
(319 words)
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| | [No title] |
| | The memory address of the instruction is placed in the MAR and the cpu waits for the instruction to appear in the MDR. | | | The address bus usually has the same number of lines as there are bits in the computer's addresses. | | | In particular it must move that data by putting address 50H into the MAR, the contents of AL into the MDR and waiting for memory to respond by copying the data from the data bus into the memory address specified on the address bus. |
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http://condor.depaul.edu/~glancast/343class/docs/hardware.txt
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| | Processor / Memory Address Bus |
| | The speed of the address bus is the same as the data bus it is matched to. | | | The address bus is the set of lines that carry information about where in memory the data is to be transferred to or from. | | | Processors usually can address far more physical memory than most people will ever use, and in fact the system chipset or motherboard factors usually place much tighter restrictions on maximum system memory than the processor does. |
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http://www.pcguide.com/ref/cpu/arch/extAddress-c.html
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| | [No title] |
| | When the input is 10, the sequential address of 10 is 11, so the code for 11 is swapped with the code for 10. | | | While the encoding techniques for instruction address bus are based on the characteristics of sequential data, those for data address buses are based on the principle of locality of data addresses. | | | Since addresses on the instruction address bus are sequential most of the time, we first analyze the characteristics of a completely sequential set of data. |
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http://www.ics.uci.edu/~maheshmn/encoding_tr.doc
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| | PC bus systems |
| | The bus mastering was not a complete or perfect implementation due to certain limitations such as a request by a Bus master for 'Bus hand-off' requiring several cycles for completion and the master having to relinquish the bus periodically to allow memory refresh (or do the refresh itself). | | | Another potential problem with VL-bus is that the bus is driven directly by the CPU and Intel discouraged the placing of cards directly on the CPU bus since the output signals of the 80x86 are not designed to drive the heavy loads usually associated with a bus and card structure. | | | In the case of the S-100 bus, many of the bus lines are signals which are actually generated by the 8080 processor rather than being abstracted a level beyond the microprocessor. |
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http://www.csn.ul.ie/~stephen/buses.html
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| | ' + pPage + ' |
| | This bus is used to transfer data between the CPU and the main system bus, for example, or between the CPU and an external memory cache. | | | This bus is either a part of the processor bus itself, or in most cases is implemented separately by a dedicated chipset that is responsible for transferring information between the processor bus and the memory bus. | | | Two versions of the ISA bus exist, based on the number of data bits that can be transferred on the bus at a time. |
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http://cma.zdnet.com/book/upgraderepair/ch05/ch05.htm
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| | isa_bus description |
| | The gate is an essential component and is there to protect the ISA bus from being driven at the wrong time. | | | The design for an input port is similar to the design for an output port with the exception that you need an 8-bit tri-state gate to buffer the data from the IO device to the ISA bus. | | | The purpose of this web page is to introduce you to the PC ISA bus and to show you how to do simple IO designs using this bus. |
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http://ece.wpi.edu/~wrm/Courses/EE3803/Labs/isa
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| | Motorola 68000 Encyclopedia Article, Definition, History, Biography |
| | The Bus Error and Address Error instructions pushed a large amount of internal state onto the supervisor stack in order to facilitate recovery, and the MOVE from SR instruction was made privileged. | | | Vectors 3 through 15 were used to report various errors: bus error, address error, illegal instruction, zero division, CHK and CHK2 vector, privilege violation, and some reserved vectors that became line 1010 emulator, line 1111 emulator, and hardware breakpoint. | | | The 68000 does provide a bus error exception which can be used to trap, but it does not save enough processor state to resume the faulted instruction once the operating system has handled the exception. |
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http://encyclopedia.localcolorart.com/encyclopedia/Motorola_68000
(2377 words)
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| | 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. | | | The data bus transfers actual data whereas the address bus transfers information about where the data should go. | | | On PCs, the old ISA bus is being replaced by faster buses such as PCI. |
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http://www.webopedia.com/TERM/b/bus.html
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| | Introduction to VME |
| | VME bus was intended to be a flexible environment supporting a variety of computing intensive tasks, and has become a very popular protocol in the computer industry. | | | The bus usage was developed from a computing point of view, which leads to a completely memory mapped scheme. | | | The VME bus system consists of 4 sub-buses: the Data Transfer Bus, the Arbitration Bus, the Priority Interrupt Bus and the Utility Bus. |
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http://www.lecroy.com/lrs/appnotes/introvme/introvme.htm
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| | Data and address bus on 52pin uPSD3234A40 |
| | The current board is with 8032 and PSD813 with address and data bus used to map display. | | | I would like to implement data and address bus using the PLD logic. | | | Also refer to Figure 64 ans Table 92. |
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http://www.keil.com/discuss/docs/thread2386.htm
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| | Accessing the I/O bus and the address bus |
| | To read from physical memory, open the device for reading, seek to the start address, and read the region into the user process from the file descriptor. | | | However, acfg utilities are a special case and must be able to search the I/O and memory address space looking for hardware before the device driver has been linked into the UNIX kernel. | | | The UNIX I/O model generally uses kernel-level device drivers for all access to the hardware. |
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http://docsrv.sco.com/HDK_mdi/acfg_iopl.html
(198 words)
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| | NodeWorks - Encyclopedia: Address bus |
| | An address bus is (part of) a computer bus, used by CPUss or DMA-capable units for communicating the physical addresses of computer memory elements/locations that the requesting unit wants to access (read/write). | | | In most microcomputers the addressable elements are 8-bit bytes (so a "K" in that case is equal to a "KB", i.e. | | | For example, a 16-bit wide address bus (commonly used in the 8-bit processors of the 1970s and early 1980s) reaches across 2 to the power of 16 = 65,536 = 64K memory locations, whereas a 32-bit address bus (common in today's PC processors) can address 4,294,967,296 = 4G locations. |
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http://pedia.nodeworks.com/A/AD/ADD/Address_bus
(169 words)
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| | 32-bit |
| | 32-bit is a term applied to processors, and computer architectures which manipulate the address and data in 32-bit chunks. | | | It is also a term given to a generation of computers where 32-bit processors were the norm. | | | For example, the Pentium Pro processor is a 32-bit machine, but the external address bus is 36-bits wide, and the external data bus is 64-bits wide. |
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http://thedavidlawrenceshow.com/32bit_002375.html
(243 words)
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| | Dictionary of Computers - address bus |
| | bus used to select the route for any particular data item as it is moved from one part of a computer to another. | | | Blue and red acknowledge Andorra's links with France. |
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http://www.tiscali.co.uk/reference/dictionaries/computers/data/m0034256.html
(65 words)
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| | address bus |
| | A 20-line address bus (used in early Intel 8086/8088 processors) can access 1MB of memory, a 24-line address bus can access 16MB, and a 32-line address bus can access more than 4GB. | | | The number of lines in the address bus determines the number of memory locations that the processor can access, because each line carries one bit of the address. | | | The electronic channel, usually from 20 to 64 lines wide, used to transmit the signals that specify locations in memory. |
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http://www.coffeycountyks.org/Terms/2461HTML-51.html
(93 words)
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| | CertiGuide to A+ (Core Hardware) - Address Bus |
| | For example, if we had a 24-bit address bus (like in an Intel 80286 processor), the processor would have the ability to address 16 MB of RAM (2 | | | The second piece of our memory bus that is responsible for addressing the individual cells (typically a cell is comprised of 4 bits of data) of RAM is known as the address bus. | | | The width of the address bus defines how much memory the processor could potentially address. |
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http://certiguide.com/aplush/cg_aph_AddressBus.htm
(373 words)
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| | High-Tech Dictionary Definition |
| | Connections between the central processing unit (CPU) and memory which transmit the address from which the CPU will read, or to which the CPU will write.(The data is transmitted via the data bus.) The amount of memory the CPU can address is determined by the number of bits in the address bus. |
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http://www.computeruser.com/resources/dictionary/definition.html?lookup=855
(52 words)
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