3.HARDWARE SETUP

3.7.2Assigning IRQs for Expansion Cards

This is applicable only when MPS 1.4 Support is Disabled in section 4.6 Boot Menu.

Some expansion cards need an IRQ to operate. Generally, an IRQ must be exclu- sively assigned to one use. In a standard design, there are 16 IRQs available but most of them are already in use, leaving 6 IRQs free for expansion cards. If your motherboard has PCI audio onboard, an additional IRQ will be used. If your moth- erboard also has MIDI enabled, another IRQ will be used, leaving 4 IRQs free.

IMPORTANT: If using PCI cards on shared slots, make sure that the drivers sup- port “Share IRQ” or that the cards do not need IRQ assignments. Conflicts will arise between the two PCI groups that will make the system unstable or cards inoperable.

The following table lists the default IRQ assignments for standard PC devices. Use this table when configuring your system and for resolving IRQ conflicts.

ISA Interrupt (IRQ) Assignments

ISA INT

Priority

Standard Function

ISA 00

1

System Timer

ISA 01

2

Keyboard Controller

ISA 02

N/A

Programmable Interrupt

ISA 03*

11

Communications Port (COM2)

ISA 04*

12

Communications Port (COM1)

ISA 05*

13

Sound Card (sometimes LPT2)

ISA 06

14

Floppy Disk Controller

ISA 07*

15

Printer Port (LPT1)

ISA 08

3

System CMOS/Real Time Clock

ISA 09*

4

ACPI Mode when used

ISA 10*

5

IRQ Holder for PCI Steering

ISA 11*

6

IRQ Holder for PCI Steering

ISA 12*

7

PS/2 Compatible Mouse Port

ISA 13

8

Numeric Data Processor

ISA 14*

9

Primary IDE Channel

ISA 15*

10

Secondary IDE Channel

*These IRQs are usually available for PCI devices.

PCI Interrupt (IRQ) Assignments

PCI Slot

PCI INTA

PCI INTB

PCI INTC PCI INTD

1 (32-bit)

PCI 00

PCI 10

PCI 11

PCI 12

2 (32-bit)

PCI 01

PCI 12

PCI 10

PCI 11

3 (32-bit)

PCI 02

PCI 11

PCI 12

PCI 10

4 (32-bit)

PCI 03

PCI 13

PCI 14

PCI 15

5 (64-bit)

PCI 05

PCI 15

PCI 13

PCI 14

6 (64-bit)

PCI 06

PCI 14

PCI 15

PCI 13

7 (32-bit)

PCI 07

PCI 13

PCI 14

PCI 15

.3 SETUPH/W

System Memory

User’s Manual

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Fujitsu D1241 manual Assigning IRQs for Expansion Cards, ISA Interrupt IRQ Assignments

D1241 specifications

The Fujitsu D1241 is a high-performance server motherboard designed to cater to the demands of various applications, particularly in enterprise environments. It supports advanced computing requirements while providing flexibility and reliability that organizations require to thrive in a competitive landscape.

One of the standout features of the Fujitsu D1241 is its support for the latest Intel Xeon processors. This enables the motherboard to deliver exceptional processing power, making it suitable for data-intensive workloads such as virtualization, database management, or high-performance computing. With multiple CPU configurations, organizations can easily scale their performance needs based on their workloads.

The D1241 is equipped with robust memory support, allowing it to handle up to 1TB of DDR4 ECC RAM across its DIMM slots. This capability is crucial for mission-critical applications where data integrity and reliability are paramount. The use of Error-Correcting Code (ECC) technology helps identify and correct memory errors automatically, thereby minimizing system downtime and enhancing overall system stability.

In terms of connectivity, the Fujitsu D1241 features multiple PCIe slots that enable organizations to incorporate additional components, such as GPUs, RAID controllers, or network interface cards. This expandability ensures that businesses can customize their systems to meet their specific requirements. Furthermore, it includes multiple SATA and NVMe ports, which allow for fast storage solutions, enhancing data retrieval and processing speeds.

Security is another critical aspect of the Fujitsu D1241. The motherboard is designed with advanced security features, including firmware and hardware-based security measures, to protect sensitive data against unauthorized access. This capability is essential for businesses that handle confidential information and need to comply with industry regulations.

Cooling and power efficiency are also prioritized in the design of the D1241. The motherboard supports advanced thermal management technologies, ensuring optimal system performance even under heavy loads. Combined with a power-efficient design, the D1241 helps organizations reduce energy costs while maintaining performance.

Overall, the Fujitsu D1241 stands out as a versatile and robust motherboard, combining cutting-edge technology, expandability, and reliability. Its enterprise-grade features make it a preferred choice for businesses looking to invest in a dependable server platform that can adapt to evolving technological demands. With its rich feature set, the D1241 proves to be an excellent foundation for a wide range of applications.