ess man page on OpenBSD

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ESS(4)			  OpenBSD Programmer's Manual			ESS(4)

     ess - ESS Technology AudioDrive family audio device

     ess*   at isapnp?
     audio* at ess?

     The ess driver provides support for the ESS 1788, 1888, 1887, and 888
     AudioDrive audio devices.

     The AudioDrive 1788 is a half-duplex device, while the 1888, 1887, and
     888 are full-duplex.  All are capable of 8- and 16-bit audio sample
     recording and playback at rates up to 44.1kHz.

     The AudioDrive takes 16 I/O ports.	 The I/O port range, IRQ, and DRQ
     channels are set by the driver to the values specified in the
     configuration file (or for isapnp or ofisa, the values assigned from the
     firmware).	 The I/O port base must be one of 0x220, 0x230, 0x240, 0x250.
     The IRQ must be one of 5, 7, 9, 10 (or 15 on the 1887 only).  The first
     DRQ channel must be selected from 0, 1, 3.	 The second DRQ channel (used
     for playback by the full-duplex 1888/1887, ignored by the 1788) can
     additionally be set to 5.	If both DRQ channels are used they must be

     The joystick interface (if enabled) is handled by the joy(4) driver.

     audio(4), intro(4), isapnp(4), joy(4), sb(4)

     The ess device driver appeared in OpenBSD 2.2.

     The AudioDrive devices have a SoundBlaster compatibility mode, and may be
     detected by the SoundBlaster driver (see sb(4)) rather than the
     AudioDrive driver.	 The workaround is to remove or disable the
     SoundBlaster driver from the kernel configuration.

OpenBSD 4.9			 June 26, 2008			   OpenBSD 4.9

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