This guide documents the Silicon Graphics® Audio/Serial Option:
Chapter 1, “Overview and Theory of Operation” lists the basic capabilities of the Audio/Serial Option and provides block diagrams of the board functions.
Chapter 2, “Using the Serial Ports” describes how to connect devices to the serial ports, supported baud rates, device file names for the serial ports, and how to switch the serial ports between RS-232 and RS-422 protocols.
Chapter 3, “Using Audio” documents how to connect devices to the audio jacks, how to adjust the input and output audio levels, and how to use the line-level inputs and outputs in two-channel and four-channel modes.
Appendix A, “Connector Pinouts” provides detailed specifications for the Audio/Serial Option, and documents the board's connectors and the signals present on each pin.
This document is designed to give you an overview of using both the serial ports and the audio capabilities of the Audio/Serial Option. The audio features and standard serial features of the Audio/Serial Option are documented in a variety of existing guides and reference pages. The next section, “Additional Documentation and Information” provides a list of those sources.
In addition to the Audio/Serial Option User's Guide, additional information is available from several different sources.
See the Audio/Serial Option Release Notes for up-to-the-minute information on the product. Release notes are provided online, and can be viewed using the following commands:
| relnotes | A text-based release notes viewer, available by typing relnotes at a shell prompt. | |
| grelnotes | A graphical release notes viewer, which is available from the Help menu of the Toolchest, or by typing grelnotes at a shell prompt. |
For more information about using and configuring serial ports, see the Personal System Administration Guide, the IRIX Advanced Site and Server Administrator's Guide, and the serial(7) reference page.
 | Note: One section of the Personal System Administration Guide does not apply to the Audio/Serial Option. The section “Setting Up Peripheral Connections” describes the Port Tool, which does not work with the Audio/Serial Option. |
For information on writing STREAMS based applications for the Audio/Serial Option, see asoser(7) and streamio(7). For information on writing memory-mapped (non STREAMS) applications, see asoserns(7) and the file /usr/include/sys/asoser.h.
For an overview of the various audio commands, including available online reference pages, see audio(1).
See the Media Control Panels User's Guide and the Media Tools User's Guide for more information about using audio tools, including making and playing back recordings and editing sound files.
For information on developing audio applications, see the IRIS® Digital Media Programming Guide and the Apple® Audio Interchange File Format – AIFF-C Specification, which are available from Silicon Graphics in the IRIS Digital Media documentation kit.