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ESS(4) NetBSD Kernel Interfaces Manual ESS(4)
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by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
ess -- ESS Technology AudioDrive family audio device driver
ess* at isapnp?
ess* at pnpbios? index ?
ess* at ofisa?
audio* at audiobus?
opl* 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 chan-
nels are set by the driver to the values specified in the configuration
file (or for isapnp, pnpbios, 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 addi-
tionally be set to 5. If both DRQ channels are used they must be differ-
The joystick interface (if enabled) is handled by the joy(4) driver.
audio(4), isapnp(4), joy(4), ofisa(4), opl(4), i386/pnpbios(4)
The ess device driver appeared in NetBSD 1.4.
The AudioDrive devices have a SoundBlaster compatibility mode, and may be
detected by the SoundBlaster driver (see sb(4)) rather than the Audio-
Drive driver. The workaround is to remove the SoundBlaster driver from
the kernel configuration.
NetBSD 9.99 August 25, 2020 NetBSD 9.99