Intel Desktop Board D850GB Technical Product Specification
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1.8 Audio Subsystem (Optional)
CAUTION
The pins on both the legacy-style 2-mm and the ATAPI CD-ROM connectors are wired to the same
inputs on the audio mixer. Do not attach CD-ROM drives to both connectors, otherwise, the board
or drives could be damaged.
The audio subsystem includes 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
Even though all connectors may not appear on all boards, the audio subsystem supports the
following audio interfaces:
• CD-ROM (legacy-style 2-mm connector)
• ATAPI-style connectors:
CD-ROM
Auxiliary line in
• Back panel audio connectors:
Line out
Line in
Mic in
The audio subsystem consists of the following devices:
• Intel 82801BA I/O Controller Hub (ICH2)
• Analog Devices AD1881 analog codec
Figure 4 is a block diagram of the audio subsystem.
82801BA
I/O Controller Hub
(ICH2)
OM10623
CD-ROM
Line In
Audio In
Mic In
Line Out
Analog Devices
AD1881
Analog Codec
AC ’97
Link
Figure 4. Audio Subsystem Block Diagram
For information about Refer to
The back panel audio connectors Section 2.8.1, page 50