MachOne™
Integrated PCI Audio Processor
OPTi®
912-3000-042 Page 1
Revision: 1.0
The information contained within this document is subject to change without notice. OPTi Inc. reserves the right to make changes in this manual at any time as well as in the products it
describes, at any time without notice or obligation. OPTi Inc. assumes no responsibility for any errors contained within. In no event will OPTi Inc. be liable for any damages, direct, indirect, inci-
dental or consequential resulting from any error, defect, or omission in this specification. OPTi and OPTi Inc. are registered trademarks of OPTi Inc. OPTiFM is a trademark of OPTi Inc. All
other trademarks and copyrights are the property of their respective holders. Copyright © 1997 OPTi Inc.
1.0 Overview
The OPTi MachOne™ is a single chip PCI audio processor
that taps the power and performance of the 132MB/sec PCI
bus without sacrificing essential legacy support for the huge
installed base of Sound Blaster™ compatible applications.
With strict adherence to ISA 1.0 and PCI 2.1 PnP standards,
the MachOne delivers the highest assurance of system and
operating system compatibility. The MachOne is ideal for
desktop, notebook, mobile, and embedded applications
requiring a high level of integration and uncompromising
sound quality.
The MachOne’s PCI bus master interface ensures extremely
low system overhead for audio data transfers, freeing the use
of system memory for downloadable MIDI patchsets or
Microsoft DirectMusic™ samples. By utilizing both 3V and
5V, the MachOne delivers the optimal balance between
power consumption and performance.
Hi-Fidelity
OPTi’s third-generation 16-bit Sigma-Delta codec provides
high quality analog-to-digital and digital-to-analog conver-
sions. The Sigma Delta codec is integrated with a low distor-
tion complex mixer and a 3D stereo expander which
dramatically enhances the audio experience with only stan-
dard speakers. Digital audio output provides support for digi-
tal speakers or external mixers, and a General Purpose I/O
port is provided for external audio controllers.
In addition to the 20 OPTiFM™ voices, the MachOne archi-
tecture provides powerful audio software enhancements,
including wavetable, and 3D positioning acceleration—mak-
ing the MachOne an ideal gaming platform. The Digital Game
Port Timer improves overall system performance by offload-
ing from the CPU.
Expandability
The MachOne is an ideal building block for advanced audio
solutions. The MPU-401 port supports external MIDI devices,
such as keyboards. Two sets of asynchronous I/O ports sup-
port Zoom Video, hardware wavetable, speaker phone, Digi-
tal CD-In, DSP data and more.
Mobile Application
The MachOne supports both ACPI and APM which makes it
an ideal audio solution for mobile applications. The MachOne
supports the industry-standard AC-LINK; an ideal docking
station interface. The small audio footprint of the MachOne
128-pin LQFP package saves valuable real estate which is
prized in space constrained notebook designs.
Integration
The high level of integration of the MachOne eliminates the
requirement for additional memory, codecs, 3D, and other
discrete components. This minimizes the design effort as well
as the total cost of design implementation.
The combination of PCI, outstanding legacy SB Pro Compati-
bility, smallest audio footprint, and Notebook optimization
extensions make the MachOne the ideal audio solution for
desktop, notebook, mobile, and embedded applications
requiring a high level of integration and uncompromising
sound quality.
2.0 Features
• 32-bit PCI Bus Master, PCI 2.1 compliant.
• Integrated sound controller compatible with Sound Blaster
(SB) Pro, Ad Lib, and Microsoft Windows Sound System
(WSS).
• SB Pro/ WSS Compatibility
- Support distributed DMA, virtual DMA with stream scat-
ter/gather buffer control.
- Support Serial IRQ and Drive-back IRQ.
• Support stream scatter/gather buffer to improve PCI bus
bandwidth.
• ISA 1.0 and PCI 2.1 Plug and Play compatible.
• Built-in AC-97 compatible Codec.
• Supports optional external AC-97 Codec through
AC-LINK.
• Full duplex operation: Record and playback simulta-
neously.
• Support IMA ADPCM, µ-Law, A-Law decompression.
• High-quality 20-voice, 52-operator, enhanced OPTiFM
music synthesizer.
• Built-in 16-bit Sigma-Delta Stereo codec.
• Built-in 7-channel mixer: 5 stereo channels and 2 mono
channels.
• 64-step master volume control.
• QSound 3D Sound Enhancement.
• Integrated MIDI UART with FIFO for both input and output
with MPU-401 interface.
• Integrated dual game port with Digital Game Port Inter-
face.
