Intel
®
Desktop Board D815EEA Technical Product Specification
32
1.8.3.3 AGP Add-in Card Support
AGP is a high-performance interface for graphics-intensive applications, such as 3D applications.
While based on the PCI Local Bus Specification, Rev. 2.1, AGP is independent of the PCI bus and
is intended for exclusive use with graphical display devices. AGP overcomes certain limitations of
the PCI bus related to handling large amounts 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 efficiency
For information about Refer to
Obtaining the
Accelerated Graphics Port Interface Specification
Section 1.3, page 16
1.9 Audio Subsystem (Optional)
The D815EEA board offers two separate audio subsystems. Both audio subsystems include these
features:
• Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB
• Power management support for APM 1.2 and ACPI 1.0 (driver dependant)
• 3-D stereo enhancement
Both audio subsystems support the following audio connectors:
• Inputs:
Three analog line-level stereo inputs for connection from line in, CD, and auxiliary line in
Two analog line-level inputs for speakerphone
One mono microphone input
• Outputs:
Stereo line-level output
Mono output for speakerphone
1.9.1 Basic Audio Subsystem
The basic audio subsystem consists of the following:
• Intel 82801BA I/O Controller Hub (ICH2)
• Analog Devices AD1885 analog codec
Figure 4 is a block diagram of the basic audio subsystem. The basic audio subsystem supports the
following features:
• 94 dB signal-to-noise ratio sound quality
• Playback sample rates up to 48 kHz
• 64 voice synthesizer
• Software compatible with Windows 98 Gold and SE, Windows 2000, and Windows NT 4.0
• Full-duplex operation at asynchronous hardware record/playback samples rates
• Frequency response: 20 Hz to 20 kHz (+- 0.1 dB)
• ACPI and APM power management compliant
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