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ess(4) [netbsd man page]

ESS(4)							   BSD Kernel Interfaces Manual 						    ESS(4)

ess -- ESS Technology AudioDrive family audio device driver SYNOPSIS
ess* at isapnp? ess* at pnpbios? index ? ess* at ofisa? audio* at audiobus? opl* at ess? DESCRIPTION
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 configura- tion 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 chan- nel (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 different. The joystick interface (if enabled) is handled by the joy(4) driver. SEE ALSO
audio(4), isapnp(4), joy(4), ofisa(4), opl(4), pnpbios(4) HISTORY
The ess device driver appeared in NetBSD 1.4. BUGS
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 the SoundBlaster driver from the kernel configuration. BSD
June 22, 2005 BSD

Check Out this Related Man Page

SB(4)							   BSD Kernel Interfaces Manual 						     SB(4)

sb -- SoundBlaster family (and compatible) audio device driver SYNOPSIS
sb0 at isa? port 0x220 irq 5 drq 1 drq2 5 sb1 at isa? port 0x240 irq 7 drq 1 flags 1 sb* at isapnp? sb* at pnpbios? index ? audio* at audiobus? midi* at sb? mpu* at sb? opl* at sb? DESCRIPTION
The sb driver provides support for the SoundBlaster, SoundBlaster Pro, SoundBlaster 16, Jazz 16, SoundBlaster AWE 32, SoundBlaster AWE 64, and hardware register-level compatible audio cards. The SoundBlaster series are half-duplex cards, capable of 8- and 16-bit audio sample recording and playback at rates up to 44.1kHz (depending on the particular model). The base I/O port address is usually jumper-selected to either 0x220 or 0x240 (newer cards may provide software configuration, but this driver does not directly support them--you must configure the card for its I/O addresses with other software). The SoundBlaster takes 16 I/O ports. For the SoundBlaster and SoundBlaster Pro, the IRQ and DRQ channels are jumper-selected. For the SoundBlaster 16, the IRQ and DRQ channels are set by this driver to the values specified in the config file. The IRQ must be selected from the set {5,7,9,10}. The configuration file must use 1 flags specification to enable the Jazz16 support. This is to avoid potential conflicts with other devices when probing the Jazz 16 because it requires use of extra I/O ports not in the base port range. With a SoundBlaster 16 card the device is full duplex, but it can only sensibly handle a precision of 8 bits. It does so by extending the output 8 bit samples to 16 bits and using the 8 bit DMA channel for input and the 16 bit channel for output. The joystick interface (if enabled by a jumper) is handled by the joy(4) driver, and the optional SCSI CD-ROM interface is handled by the aic(4) driver. SoundBlaster 16 cards have MPU401 emulation and can use the mpu attachment, older cards have a different way to generate MIDI and has a midi device attached directly to the sb. SEE ALSO
aic(4), audio(4), isa(4), isapnp(4), joy(4), midi(4), mpu(4), opl(4), pnpbios(4) HISTORY
The sb device driver appeared in NetBSD 1.0. BUGS
Non-SCSI CD-ROM interfaces are not supported. The MIDI interface on the SB hardware is braindead, and the driver needs to busy wait while writing MIDI data. This will consume a lot of system time. BSD
June 22, 2005 BSD
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