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Topic: Bus mastering

	Server-plus: Bus Mastering
		Bus Mastering is feature that enables the CPU to communicate with the peripherals faster.
		Bus Mastering is a feature that enables the Bus Controller to communicate with other devices under constant control of CPU.
		Bus Mastering is a feature which enables the external devices to be connected to internal PCI bus.
	www.simulationexams.com /SampleQuestions/comptia/server_q5.htm (130 words)

	Bus mastering - Wikipedia, the free encyclopedia
		In computing, bus mastering is a feature supported by some bus architectures that enables a controller connected to the bus to communicate directly with other devices on the bus without going through the CPU.
		The bus master is the device that drives the address bus and bus control signals.
		Direct memory access is a simple form of bus mastering where the I/O device is set up by the CPU to read from or write to one or more immediate blocks of memory and then signal to the CPU when it has done so.
	en.wikipedia.org /wiki/Bus_mastering (328 words)

	Direct Memory Access (DMA) Modes and Bus Mastering DMA
		Bus mastering allows the hard disk and memory to work without relying on the old DMA controller built into the system, or needing any support from the CPU.
		Bus mastering DMA keeps CPU utilization low, which is the amount of work the CPU must do during a transfer.
		Problems with implementing bus mastering DMA on systems in the 1996 to 1998 time frame were numerous: issues with buggy drivers, software the didn't work properly, CD-ROM drives that wouldn't work with the drivers, and so on.
	www.storagereview.com /guide2000/ref/hdd/if/ide/modesDMA.html (961 words)

	1212 I/O PCI Bus Mastering (Site not responding. Last check: 2007-10-13)
		The 1212 I/O operates as a PCI bus master.
		Multiple bus masters can coexist in a single system, as long as they leave enough time for one another to operate; this is why it is sometimes necessary to scale back video or SCSI acceleration.
		Modern Windows-compatible motherboards generally support bus masters in all PCI slots, so you should be able to place the 1212 I/O in any slot.
	www.korg.com /1212faq/1212_pci_bus_master.htm (219 words)

	What is BUS Mastering? There's no DMA channels on a PCI bus (Site not responding. Last check: 2007-10-13)
		Bus mastering is a bus design that allows peripherals (plug-in boards) to access the computer's memory independently of the CPU.
		Bus mastering usually requires that the adapter or peripheral have its own built-in processor so that it can operate independently of the CPU.
		In order when Bus Masters, configured properly with other elements of your system, can reduce the CPU's work of retrieving and/or storing data on your hard disk drive or other IDE device.
	bugclub.org /beginners/hardware/BUSMastering.html (121 words)

	Matching Data Bus Throughput To Data Acquisition Needs
		Bus mastering allows an adapter to hijack the data bus temporarily by bidding for and gaining control of the bus to perform a specific task.
		If a high-speed application requires bus mastering, one factor to consider is the method used by the board for writing data to memory.
		The PCI bus without bus mastering is a cost-effective solution for the vast majority of data acquisition applications.
	www.evaluationengineering.com /pctest/articles/e707data.htm (1806 words)

	PCI Bus Overview by Quatech
		To ensure the longevity of the bus, not only are systems based on newer PCI specifications backward compatible with those designed to older ones, PCI boards may also be used in a system that also uses ISA bus cards--however, this is becoming increasingly rate as ISA is rapidly becoming obsolete.
		The high speed data transfers across the PCI bus limits the number of PCI expansion slots that can be built into a single bus to 3 or 4, as opposed to the 6 or 7 available on the ISA bus.
		Bus mastering works by sending Request signals to the Central Resource (circuitry on the motherboard shared by all bus devices) when a device wants control of the bus, and when that control is ceded a Grant signal is received by the device.
	www.quatech.com /support/comm-over-pci.php (2051 words)

	Why is my computer slow and why is there a yellow ! in device manager - Data Doctors Computer Services
		This information was found on the web site of PC Guide which explains the concept of bus mastering that you might have applied to your hard drive, and maybe it wasn't configured properly or your bios set up is not configured properly, and some of the reasons as to why your computer has been slow.
		Bus Mastering Hard Disk: Normally this means that the drive must be capable of at least multiword DMA mode 2 transfers.
		Bus Mastering Drivers: A special driver must be provided to the operating system to enable bus mastering to work.
	www.datadoctors.com /help/questions/question.cfm?id=2214 (1222 words)

	Bus (Site not responding. Last check: 2007-10-13)
		A bus is a set of signal pathways that allow information to travel between components inside or outside of a computer.
		Introduced by IBM, ISA or Industry Standard Architecture was originally an 8-bit bus and later expanded to a 16-bit bus in 1984.
		When this bus was originally released it was a proprietary bus, which allowed only IBM to create peripherals and the actual interface.
	www.escotal.com /bus.html (545 words)

	Computers: The Past, Present, and Future -- Present
		Bus mastering allows expansion cards to communicate directly with other devices without having to go through the CPU.
		Bus mastering allows the expansion cards to read or write directly from another device.
		Therefore, the more bus mastering devices, the faster the bus is capable of operating.
	library.advanced.org /25485/present/topics/busmst.html (110 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.
		The MCA bus offered several additional features over the ISA such as a 32-bit bus, automatically configure cards (similar to what Plug and Play is today), and bus mastering for greater efficiency.
		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)

	SysOpt Forums - Help! I can't find ah answer!!!!
		Bus mastering is a feature of PCI bus which may be implemented by any PCI device (like disk controller, graphics controller or sound card).
		Bus mastering allows the device to control the bus and perform (initiate) any read/write transaction to the other devices on PCI bus or to the system memory.
		The advantage of bus mastering is that once the controler is programmed to perform some data transfer or to fetch a sequence of commands, no further CPU action is needed until the controller completes its task.
	www.sysopt.com /forum/printthread.php?t=55915 (1404 words)

	ISA, VESA, PCI and USB - PC ComputerNotes (Site not responding. Last check: 2007-10-13)
		It had a bus speed of 8 MHz and was capable of using 1 bus-mastering device.
		Near the end of the 486's reign, the PCI bus was introduced and adopted.
		A local bus connects directly to the processor and operates at the same speed as the CPU externally (not multiplied).
	www.pccomputernotes.com /system_bus/bus05.htm (1464 words)

	What is bus mastering? - Knowledge Base
		Bus mastering is a bus design that allows an expansion card (or plug-in board) to access the computer's memory independently of the CPU.
		Bus mastering usually requires that the device have its own built-in processor so that it can operate independently of the CPU.
		The most common bus mastering devices are IDE and SCSI hard drive controllers, video cards, and network interface cards.
	kb.iu.edu /data/ahxa.html (168 words)

	bus master (Site not responding. Last check: 2007-10-13)
		In a simple architecture only the (single) CPU can be bus master but this means that all communications between ("slave") I/O devices must involve the CPU.
		Note that any device can drive data onto the data bus when the CPU reads from that device, but only the bus master drives the address bus and control signals.
		Direct Memory Access is a simple form of bus mastering where the I/O device is set up by the CPU to read from or write to one or more contiguous blocks of memory and then signal to the CPU when it has done so.
	burks.bton.ac.uk /burks/foldoc/69/15.htm (220 words)

	Arista Corporation
		The bus mastering DMA is different from the traditional DMA on ISA bus.
		The bus mastering controller is on the PCI controller that controls the PCI bus as it become the master of the bus.
		The bus mastering DMA can reduce the using of on-board memory and the PCU loading, it directly transfer data to PC memory therefore increasing the data transfer rates and fully utilize the bandwidth of the PCI bus.
	www.aristaipc.com /data_acquisition_pci-9810.htm (571 words)

	DMA and busmastering issues
		Bus Mastering reduces CPU overhead by providing a mechanism for data transfers that do not require monitoring by the CPU.
		If you are using non-bus mastering drivers, the DMA box won't show up because Bus Mastering cannot be enabled.
		If you are using other Bus Mastering drivers, the DMA box does not show up because it is enabled by default, and you don't have the option of disabling Bus Mastering.
	www.geocities.com /Athens/Troy/6883/busmaster.html (597 words)

	Hardware Components: Buses
		Bus mastering is used by PnP sytems by either the older MCA and VESA buses and the newer PCI buses.
		This bus moved data 32 bits at a time, but had no no chipsets, just hardware slots that were easy to place by manufacturers on 486 motherboards.
		PCI is a 64 bit bus that supports the Pentium computer and also supports the 32 bit data path of the 486 machines.
	www.millbury.k12.ma.us /~hs/techrepair/busses.html (3547 words)

	PCI Bus Mastering
		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.pcguide.com /ref/mbsys/buses/types/pciMastering-c.html (279 words)

	A Guide to Adapters and I/O units.
		The unit signals by applying a voltage to one of the wires in the bus - an IRQ.
		Physically, the IRQ is a wire on the bus.
		When bus and adapters are referred to as unintelligent, it implies that they are unable to organize the IRQ distribution on their own.
	www.karbosguide.com /hardware/module5a3.htm (1302 words)

	OASYS PCI and PCI Bus Mastering (Site not responding. Last check: 2007-10-13)
		The OASYS PCI operates as a PCI bus master.
		A frequently-asked OASYS PCI question is, "will the OASYS PCI work better in a bus master slot?" The quick answer is that it will only work in a bus master slot; fortunately, most recent computers, both MacOS and Windows, support bus masters in all slots.
		Modern Windows-compatible motherboards generally support bus masters in all PCI slots, so you should be able to place the OASYS PCI in any slot.
	www.korg.com /oasys_pci_faq_html/oasys_pci_and_pci_bus_mast.htm (218 words)

	Ultra ATA FAQ
		Bus Mastering DMA allows the interface card, or drive controller, to manage the transfer of data from the drive directly to the system’s memory.
		The motherboard makers supply the bus mastering drivers that should support DMA control by any bus mastering compatible interface card.
		Bus mastering drivers may be obtained from motherboard and chipset makers.
	www.seagate.com /support/kb/disc/ultra_ata_faq.html (773 words)

	Intel(R) Bus Master IDE Driver
		The Intel® Bus Master IDE driver is for use with Windows* 95 Retail and Windows 95 OSR1 only.
		The Intel Bus Master IDE driver only supports the mature Intel® 430 series and Intel® 440 series chipsets.
		If you need a Bus Master driver for the newer Intel® 800 series chipsets, we recommend using the Intel® Application Accelerator.
	developer.intel.com /design/chipsets/drivers/busmastr (176 words)

	What to Consider if you are Planning to Purchase a System with Bus Master IDE
		Bus Mastering IDE technology implements logic circuitry on your motherboard that, when configured properly with other elements of your system, can reduce the CPU's work of retrieving and/or storing data on your hard disk drive or other IDE device.
		Bus Master IDE technology will probably not improve performance if your operating environment is characterized by the one of the following:
		Implementing Bus Master IDE technology requires advanced knowledge of the PC hardware and software, as well as debug tools to optimize the system performance.
	www.intel.com /design/chipsets/applnots/mastride.htm (242 words)

	Expansion Bus - PC ComputerNotes (Site not responding. Last check: 2007-10-13)
		Remember that the expansion bus, or external bus, is made up of the electronic pathways that connect the different external devices to the rest of your computer.
		These connectors are now integrated onto the motherboard, but they are still accessed via the expansion (external) bus and are allocated the same type of resources as required by expansion cards.
		The slots attach to tiny copper pathways on the motherboard (the expansion bus), which allows the device to communicate with the rest of the computer.
	www.pccomputernotes.com /system_bus/bus02.htm (430 words)

	Ride the Bus
		A memory parity error, bus, Math Coprocessor and other hardware errors would be examples of this.
		The chipset must support AGP and the motherboard must be equipped with an AGP bus slot or must have a built-in AGP graphics system.
		Very A+ The Universal Serial Bus is a connectivity standard enabling simple Plug and Play connections to devices such as modems, digital cameras, keyboards, and mice.
	online.bcc.ctc.edu /cs110rh/IT215/week_05/5_BUS.htm (1502 words)

	System for implementing peripheral device bus mastering in a computer using a list processor for asserting and ...
		System for implementing peripheral device bus mastering in a computer using a list processor for asserting and receiving control signals external to the DMA controller (US5905912)
		The present invention relates to a system and method for implementing peripheral device bus mastering via a general purpose list processor.
		The system is comprised of four main elements: a bus controller, a DMA controller, a list processor, and a device controller.
	www.delphion.com /details?pn10=US05905912 (651 words)

	CertiGuide to A+ (A+ 4 Real) - Bus Mastering
		This is somewhat similar to DMA except that the device does not use DMA channels but accesses the bus (PCI for example) directly to transfer data.
		For example, bus mastering hard drives is common in modern computers.
		Bus mastering requires a true multitasking CPU (Pentium II or later) and a multitasking operating system such as Windows NT, Windows 2000, and Windows XP.
	certiguide.com /apfr/cg_apfr_BusMastering.htm (287 words)

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