MSI MS-7255 manual PCI Interrupt Request Routing

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MS-7255 Mainboard

PCI Interrupt Request Routing

The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus pins as follows:

 

Order 1

Order 2

Order 3

Order 4

PCI Slot 1

INT B#

INT C#

INTD#

INT A#

 

 

 

 

 

PCI Slot 2

INT C#

INTD#

INT A#

INT B#

 

 

 

 

 

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Contents MS-7255 v2.X Mainboard P4M890M2 / P4M900M2 SeriesTechnical Support Copyright NoticeTrademarks Revision HistorySafety Instructions FCC-B Radio Frequency Interference Statement Micro-Star International MS-7255Weee Waste Electrical and Electronic Equipment Statement Page Vii Contents Appendix a VIA VT8237A/8237S Sata RAID Introduction Getting Started Getting StartedSata Mainboard SpecificationsIDE Form Factor ConnectorsGetting Started Floppy SlotsMM1DI MM2DI Mainboard LayoutPacking Checklist PC AlertTM Hardware Setup Hardware SetupPWRFAN1 JCOM2 JPWR1 CPU CPUFAN1 JCASE1 JSPDIFOUT1 JPWR2 Quick Components GuideIntroduction to LGA 775 CPU CPU Central Processing UnitCPU & Cooler Installation Alignment Key Locking switch Ddrii Installing Ddrii ModulesMemory JPWR2 Power SupplyATX 24-Pin Power Connector JPWR2 ATX 12V Power Connector JPWR1LAN Back PanelMS-7255 Mainboard Audio Port Connectors FDD1 ConnectorsFloppy Disk Drive Connector FDD1 ATA133 Hard Disk Connectors IDE1 & IDE2SATA1 SATA2 Serial ATA Connectors SATA1, SATA2JCASE1 Fan Power Connectors CPUFAN1, PWRFAN1, SYSFAN1Chassis Intrusion Switch Connector JCASE1 CPUFAN1 PWRFAN1PDIF-Out Connector JSPDIFOUT1 2pin / 3pin optional Serial Port Connector JcomAux Line-In Connector JCD1 JFP2 JFP1 Front Panel Connectors JFP1/JFP2JAUD1 Front Panel Audio Connector JAUD1USB 2.0 Bracket Front USB Connectors JUSB1, JUSB2JUSB1/2 JBAT1 JumpersClear Cmos Jumper JBAT1 PCI Peripheral Component Interconnect Slots SlotsPCI Peripheral Component Interconnect Express Slots PCI Interrupt Request Routing Bios Setup Bios SetupPress DEL to enter Setup Entering SetupMain Menu Control KeysGetting Help General Help F1Main Menu Exit Without Saving Bios Setup Load Optimized DefaultsBios Setting Password Save Changes and ExitStandard Cmos Features Advanced Bios Features Chipset Feature System Bios CacheableCPU Feature Execute Disable Bit1st / 2nd Drive Bios Setup Boot Device Priority1st / 2nd / 3rd Boot Device Hard Disk DrivesIntegrated Peripherals Parallel Port Mode Bios Setup PCI IDE BusMasterRAID mode Devices ConfigurationSuspend Time Out Power Management FeaturesAcpi Function Acpi StandbyResume On RTC Alarm Bios Setup Power Button ModeRestore on AC/Power Loss Wakeup Event SetupPrimary Graphics Adapter PCI Latency TimerIRQ Resources Setup PNP/PCI Resource ManagementChassis Intrusion MonitorSpread Spectrum Adjust CPU FSB FrequencyAdjusted CPU Frequency Frequency/Voltage ControlAuto Disable PCI Clock Bios Setup Adjusted DDR Memory FrequencyAdjust Pcie Frequency Adjust AGP/PCI FrequencyLoad Optimized Defaults Bios Setting Password VIA VT8237A / VT8237S Sata RAID Introduction RAID 0 Striping RAID BasicsRAID Level Capacity BenefitsVIA VT8237A / VT8237S Sata RAID Introduction Bios ConfigurationCreate Disk Array VIA VT8237A / VT8237S Sata RAID Introduction Delete Disk Array View Serial Number of Hard Drive Create and Delete Spare Hard DriveRebuild Broken RAID 1 Array Duplicate Critical RAID 1 ArrayDestroy the Mirroring Relationship Choose Replacement Drive and RebuildContinue to boot † Confirming Windows XP Driver Installation Install Driver in Windows OS† New Windows OS 2000/XP/NT4 Installation † Existing Windows XP Driver InstallationUsing VIA RAID Tool MS-7255 Mainboard VIA VT8237A / VT8237S Sata RAID Introduction Realtek ALC883 / ALC888 Audio Click Realtek HD Audio Driver Installing the Realtek HD Audio DriverInstallation for Windows 2000/XP Realtek ALC883 / ALC888 Audio Software Configuration Environment Simulation Sound EffectLoad MS-7255 Mainboard Equalizer SelectionRaise the key Remove the human voice Lower the key Karaoke ModeMulti-Stream Function Adjust VolumePlayback multi-streaming and click OK to save the setup MixerRealtek ALC883 / ALC888 Audio Tool MS-7255 Mainboard Playback controlUte Realtek ALC883 / ALC888 Audio Recording control Audio I/O Speaker ConfigurationDisable front panel jack detection option Realtek ALC883 / ALC888 Audio Connector SettingsOutput Source PdifOutput Sampling Rate Realtek ALC883 / ALC888 Audio Test Speakers Microphone 3D Audio Demo Information Back Panel Hardware SetupConnecting the Speakers Channel Mode for Stereo-Speaker OutputChannel Analog Audio Output Description Line Out Front channels
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MS-7255 specifications

The MSI MS-7255, also known as the MSI K8N Neo4, is a versatile motherboard that has gained attention for its robust features, compatibility, and performance capabilities. Designed to support AMD's Socket 939 processors, the MS-7255 caters to users looking for a reliable platform for both gaming and everyday computing tasks.

One of the standout features of the MSI MS-7255 is its support for high-performance memory. With four DDR DIMM slots, the motherboard can accommodate up to 4GB of DDR400 RAM, allowing for fast data processing and multitasking capabilities. This memory configuration can significantly enhance overall system responsiveness, making it ideal for power users and gamers who demand excellent performance.

The MS-7255 is also equipped with NVIDIA's nForce 4 chipset, which brings significant advantages in terms of connectivity and performance. This chipset supports PCI Express, offering users the ability to install next-generation graphics cards that utilize the PCIe x16 interface, paving the way for superior graphics performance in gaming and graphic-intensive applications.

In terms of storage, the MSI MS-7255 features an impressive array of SATA ports. With up to four SATA II 3.0 Gb/s connectors, users can easily set up RAID configurations for improved data redundancy or performance. This flexibility is particularly appealing to gamers and content creators looking for faster load times and better system performance.

The motherboard also includes integrated 8-channel audio, courtesy of Realtek, providing users with high-quality sound output without the need for additional audio cards. This feature enhances the multimedia experience, making it suitable for movies, music, and gaming environments.

Connectivity options abound with the MSI MS-7255, featuring built-in Ethernet and multiple USB ports for peripheral connections. These ports enrich the user experience, allowing easy access to a range of external devices, from printers to game controllers.

In terms of user-friendly features, the MS-7255 boasts a well-designed BIOS, allowing users to easily tweak system settings for optimal performance. The board's layout also facilitates ease of installation and accessibility to components, which is a crucial factor for DIY builders.

Overall, the MSI MS-7255 is a compelling choice for users seeking a reliable, feature-rich motherboard. Its blend of performance, connectivity, and audio capabilities make it a worthy consideration for anyone looking to build a powerful and efficient system. With its ability to support the demands of both gamers and general users alike, the MS-7255 proves to be an enduring option in the motherboard market.