| Text: | This guide documents the Audio/Serial mezzanine card. This mezzanine card installs in rackmount and deskside versions of Challenge and Onyx systems. The guide provides an overview of the specific features of the serial connectors and the audio capabilities of the Audio/Serial Option. It also contains block diagrams of the board and connector pinouts. Serial documentation includes: corrensponce of serial ports to /dev device entries, setting baud rates, differences between these and existing Challenge and Onyx serial ports, and basic information on writing applications to use the serial ports. Audio documentation includes: changing sampling rates, setting 2-channel and 4-channel modes, audio-connector size limitations, and audio system specifications (standards, impedences, voltage levels, distortion, frequency response, and so forth.) This guide was not intended to be a complete description of using audio ports and serial ports on Silicon Graphics systems. Rather, it concentrates on the specifics of the Audio/Serial Option and provides references to other documents. |
