esl(4) - NetBSD Manual Pages

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ESL(4)                  NetBSD Kernel Interfaces Manual                 ESL(4)


NAME

     esl -- ESS Technology AudioDrive (Programmed I/O mode) family audio
     device driver


SYNOPSIS

     esl*   at pcmcia? function ?
     audio* at audiobus?
     opl*   at esl?


DESCRIPTION

     The esl driver provides support for the ESS 1688 AudioDrive audio devices
     on a PCMCIA card.

     Since there is no way to do DMA over the PCMCIA bus, the esl driver uses
     a Programmed I/O mode to drive the cards. This is very inefficient, but
     is the only way to drive such a card.

     Cards supported by this driver are capable of 8- and 16-bit audio sample
     playback at rates up to 44.1kHz.


SEE ALSO

     audio(4), midi(4), opl(4), pcmcia(4)


HISTORY

     The esl device driver appeared in NetBSD 1.6.


AUTHORS

     Jared D. McNeill <jmcneill@invisible.ca>


BUGS

     Putting a machine into suspend mode while this driver is active will
     cause the machine to freeze.

     Recording is not yet supported by this driver.

NetBSD 4.0                       June 22, 2005                      NetBSD 4.0