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Motherboard Description
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1.10 Audio Subsystem
The AP440FX motherboard features a 16-bit stereo audio subsystem as a factory installed option.
The audio subsystem is based on the Crystal CS4236 multimedia codec. The CS4236 provides all
the digital audio and analog mixing functions required for playing and recording of audio on
personal computers. These functions include:
• Stereo analog-to-digital and digital-to-analog converters
• Analog mixing
• Anti-aliasing and reconstruction filters
• Line and microphone level inputs
• Digital audio compression using selectable A-law / µlaw
• Full digital control of all mixer and volume control functions
The CS4236 also provides support for four major sound standards including AdLib
†
, Sound
Blaster Pro 2.0, Windows Sound System, and MPU-401. The CS4236 also supports full-duplex
operation which ensures support for applications such as video conferencing.
The CS4236 includes a Plug and Play compatible ISA interface and is comprised of seven logical
devices including:
• Synthesizer
• Game Port
• Sound Blaster
• Sound System
• MPU-401
• CD-ROM
• CS4236 device
Each logical device is configured into the host environment using the ISA Plug and Play
configuration methodologies. The audio subsystem requires up to two DMA channels and one
interrupt. The computer can be configured to use either DMA channels 0, 1, or 3. The interrupt
can be mapped to use interrupt 5, 7, 9, 11, 12, or 15.
1.11 Management Extension Hardware
The Management Extension hardware provides low-cost instrumentation capabilities designed to
reduce the total cost of PC ownership. The Management Extension hardware incorporates features
that support the requirements of the Desktop Management Interface (DMI) compliant areas of the
BIOS, as well as those of the LANDesk
Client Manager software. The hardware implementation
is a single-chip ASIC with the following features:
• An integrated temperature sensor plus support for an external temperature sensor
• Support for one fan speed sensor
• Power supply voltage monitoring to detect levels above or below acceptable values
• Registers for storing POST hardware test results and error codes
• Remote reset capabilities from a remote peer or server through LANDesk Client Manager,
Version 3.0 and service layers (when available)
• Hardware compatibility with Windows NT
†
.