eSolution: software developments

Written by ngoc son


Continued from page 1
oFixed assets, equipments management system. oMedicine Management System. oHotel Management System oe Government. oe Office. Supplying and installing IT networks: oConnecting networks in office: LAN oConnecting between office and its branches: WAN, LAN To LAN, etc. oTerminal maintenance of IT networks oSupplying hardware equipment, etc. Solutions supplied by e Solution are not only IT products, butrepparttar e Solution intellectual products with an assurance of everlasting technology assistance and after sales services. e Solution makes sure of giving your enterprise satisfaction as our guideline: “ Successful you, successful me”. As a result, our qualified, experienced technicians, and advanced technology are ready to provide full efficient solutions. To serve your enterprise isrepparttar 107543 honor of e Solution. Sincerely, Mr. NGUYỄN NGỌC SƠN, Director




Plug and Play Resource Allocation

Written by Stephen Bucaro


Continued from page 1

The Windows 2000/XP operating system component responsible for PnP isrepparttar Advanced Configuration and Power Interface (ACPI). ACPI allows devices to be controlled byrepparttar 107542 operating system to perform power management. ACPI may put a device in a power saving state such as Standby, Suspend or Off. ACPI also allows dynamic handling of events likerepparttar 107543 addition or removal of a USB device.

Duringrepparttar 107544 boot process,repparttar 107545 BIOS builds a table to record which IRQs have been used by legacy ISA devices and then assignsrepparttar 107546 unused ones torepparttar 107547 PCI bus controller. The PCI bus controller, which is part ofrepparttar 107548 motherboard chip set, managesrepparttar 107549 PCI bus andrepparttar 107550 expansion slots.

Each PCI device communicates its resource requirements to ACPI. Based onrepparttar 107551 resource requests that each device makes, ACPI assigns resources such as IRQs, I/O addresses, and memory locations, and DMA channels. ACPI can reconfigure resource assignments when needed, for example, when a device is added torepparttar 107552 system.

The PCI bus overcomesrepparttar 107553 limitation in available IRQ's with a feature called "PCI steering". PCI steering makes it possible for several devices to userepparttar 107554 same IRQ. PCI steering allocates an IRQ calledrepparttar 107555 "IRQ Holder" for PCI steering. The PCI controller steers that IRQ to its own interrupt systems onrepparttar 107556 PCI bus. These interrupts are called A, B, C, D, and so on to avoid confusion withrepparttar 107557 numbered system IRQs. One interrupt is assigned to each PCI expansion slot.

To see which IRQ has been assigned torepparttar 107558 IRQ Holder for PCI steering, openrepparttar 107559 Control Panel "System" utility. Inrepparttar 107560 "System Properties" dialog box, selectrepparttar 107561 "Hardware" tab and click onrepparttar 107562 "Device Manager..." button. In Device Manager's "View" menu select "Resources by type", then openrepparttar 107563 "Interrupt request IRQ" branch.

pcirq.bmp

- Note that Windows 2000 uses IRQ 9 for PCI Steering, so never set a device to IRQ 9.

PnP resource allocation removesrepparttar 107564 need to use jumpers of DIP switches to setrepparttar 107565 IRQ and other resources for devices. But PnP involves a complex interaction betweenrepparttar 107566 computers BIOS, chipset, PCI bus, operating system, and PnP devices.

---------------------------------------------------------- Resource Box: Copyright(C)2004 Bucaro TecHelp. To learn how to maintain your computer and use it more effectively to design a Web site and make money onrepparttar 107567 Web visit bucarotechelp.com To subscribe to Bucaro TecHelp Newsletter visit http://bucarotechelp.com/search/000800.asp ----------------------------------------------------------

To learn how to maintain your computer and use it more effectively to design a Web site and make money on the Web visit bucarotechelp.com To subscribe to Bucaro TecHelp Newsletter visit http://bucarotechelp.com/search/000800.asp


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