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Acer 1100 Series PCI Device Latency Timer, PCI IRQ Sharing

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Altos 1100 Series User’s Guide2-32

Make sure that the interrupt you assign to the

various PCI slots are not used by other

devices to avoid conflicts.

Press or to move between fields. Press or to select options.

AGP

This item shows the assigned interrupt for the onboard accelerated graphics port

(AGP) controller.

Onboard LAN

This item allows you to manually assign the interrupt for the onboard LAN when

the PCI IRQ Setting parameter is set to Manual. This parameter is grayed and not

user-configurable when the PCI IRQ Setting is set to Auto.

PCI Device Latency Timer

This parameter allows you to set the length of time for a PCI device to use the PCI

bus.

A PCI master can burst indefinitely as long as the target can source/sink the data,

and no other agent requests for the bus. If another PCI device requests for the

use of the PCI bus, a PCI bus arbitration takes place, and the tenure of the device

currently using the PCI bus cannot go over the PCI latency time set in BIOS. This

setting depends on your application.

For example, if you install a high bandwidth block I/O card, e.g., FDDI, the

longer the latency time the better. This setting only affects the primary PCI

components (PCI slots 1, 2, 3, 4, and onboard LAN). The secondary PCI

components (PCI slots 4) are always set to 20 PCI clocks. The default setting is 20.

PCI IRQ Sharing

Setting this parameter to Yes allows you to assign the same IRQ to two different

devices. To disable the feature, select No. The default setting is No.

Contents

Main Page iii Join Us to Fight Against Piracy Page Page CD-ROM Safety Warning FCC Class B Radio Frequency Interference Statement Table of Contents Chapter 1 System Board Chapter 2 BIOS Utility Page Chapter 3 System Housing Index List of Figures List of Tables About This Manual Manual Structure Chapter 1 System Board Chapter 2 BIOS Utility Chapter 3 System Housing Conventions Chapter 1 System Board 1.1 Features Page 1.2 Major Components 1.3 System Board Layout Page 1.4.2 Jumper Settings * Default Table 1-1 lists the system board jumpers with their corresponding settings and functions. Table 1-1 System Board Jumper Settings 1.4.3 Connector Functions Table 1-2 lists the different connectors on the system board and their respective functions. Table 1-2 Connector Functions Table 1-2 Connector Functions (continued) Page 1.6 Installing Optional Components 1.6.1 ESD Precautions 1.6.2 Pre-installation Instructions 1.6.3 Post-installation Instructions 1.7 Installing the Pentium II Processor Page Page 1.9 Installing the Termination Board 1.10 Memory Upgrade 1.10.1 Memory Configurations 1.10.2 Installing a DIMM 1.10.3 Removing a DIMM 1.10.4 Reconfiguring the System 1.11 Installing Expansion Cards 1.11.1 Installing 32 Bit PCI Cards 1.11.2 Installing an AGP Card 1.12 ASM Pro 1.13 Remote Diagnostic Management 1.13.1 Installing the RDM Module Page 1.14 Error Messages 1.14.1 Software Error Messages 1.14.2 System Error Messages Table 1-4 System Error Messages Table 1-4 System Error Messages (continued) 1.14.3 Correcting Error Conditions Chapter 2 BIOS Utility 2.1 Entering Setup Page 2.2 System Information 2.2.1 Processor Page Page Page Page 2.3 Product Information 2.3.1 Product Name 2.3.2 System S/N Page 2.4 Disk Drives Page Page If there is no device connected, choose None. Hard Disk Block Mode Advanced PIO Mode Hard Disk Size > 504 MB Page 2.5 Power Management 2.5.1 Power Management Mode IDE Hard Disk Standby Timer System Sleep Timer 2.5.2 Power Switch < 4 sec. 2.5.3 Wakeup Event Modem Ring 2.6 Startup Configuration 2.6.1 Fast POST Mode Page Page 2.7 Advanced Configuration 2.7.1 Onboard Devices Configuration Serial Port 1 Serial Port 2 Parallel Port 3BCh 378h 278h Page Operation Mode Onboard Floppy Disk Controller Onboard IDE Primary Channel Page 2.7.2 PnP/PCI System Configuration PCI IRQ Setting PCI Device Latency Timer PCI IRQ Sharing Page VGA Palette Snoop Graphics Aperture Size Plug and Play OS Reset Resource Assignments 2.7.3 Memory/Cache Configuration Internal Cache (CPU Cache) Cache Scheme Page 2.7.4 CPU Speed Configuration Bus Frequency Multiple Processor Speed 2.7.5 System Event Configuration System Event Logging View Event Logs Event Control Threshold Settings 2.8 System Security Setup 2.8.1 Disk Drive Control 2.8.2 Setup Password Setting a Password Changing or Removing the Setup Password Bypassing the Setup Password 2.8.3 Power-on Password Operation Mode Page 2.9 Date and Time 2.9.1 Date 2.9.2 Time 2.10 Remote Diagnostic Configuration Page 2.11 Load Setup Default Settings 2.12 Abort Settings Change 2.13 Leaving Setup Chapter 3 System Housing Page Page Altos 1100 Series Users Guide 3-4 3.2.2 Rear Panel Chapter 3 System Housing 3-5 3.2.3 Internal Structure The figure below shows the housing internal structure and some of the basic system components. Page 3.3.2 Left Panel 3.4 Installing Disk Drives 3.4.1 3.5-inch Drive 3.4.2 5.25-inch Drives Page Page Page Page 3.6.1 Jumpers and Connectors The following diagram shows the SCSI jumpers and connectors. * Default JP4 3.6.2 SCSI Backplane Board Index A B C D E F H I J L N O P R S T W