Product Description

1.6.1Direct AGP

Direct (integrated) AGP is a high-performance bus (independent of the PCI bus) for graphics-intensive applications, such as 3-D applications. AGP overcomes certain limitations of the PCI bus related to handling large amount of graphics data with the following features:

∙Pipelined memory read and write operations that hide memory access latency

∙Demultiplexing of address and data on the bus for nearly 100 percent bus efficiency

For information about

The location of the VGA port connector

Obtaining the Accelerated Graphics Port Interface Specification

Refer to

Figure 4, page 39

Table 2, page 13

1.6.2USB

The board supports up to four USB ports; one USB peripheral can be connected to each port. For more than four USB devices, an external hub can be connected to any of the ports. Two USB ports are implemented with stacked back panel connectors. The other two ports can be routed from the connector at location J7A1 via a cable to the front panel. The board fully supports UHCI and uses UHCI-compatible software drivers. USB features include:

∙Support for self-identifying peripherals that can be connected or disconnected while the computer is running

∙Automatic mapping of function to driver and configuration

∙Support for isochronous and asynchronous transfer types over the same set of wires

∙Support for up to 127 physical devices

∙Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other applications

∙Error-handling and fault-recovery mechanisms built into the protocol

✏NOTE

Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use shielded cable that meets the requirements for full-speed devices.

For information about

The location of the USB connectors on the back panel

The signal names of the USB connectors

The location of the USB port connector for the front panel

The signal names for the USB port connector for the front panel

The USB and UHCI specifications

Refer to

Figure 4, page 39

Table 17, page 40

Figure 6, page 46

Table 30, page 47

Table 2, page 13

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