sb(4) [netbsd man page]

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

NAME

     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

Check Out this Related Man Page

GUS(4)							   BSD Kernel Interfaces Manual 						    GUS(4)

NAME

     gus -- Gravis UltraSound/UltraSound MAX audio device driver

SYNOPSIS

     gus0 at isa? port 0xPPP irq X drq Y drq2 Z
     audio* at audiobus?

DESCRIPTION

     The gus driver provides support for the Gravis UltraSound (GUS) and GUS MAX audio cards.  Both cards have on-board memory which is used for
     seamless playback of samples.  They can play back 8- or 16-bit samples at up to 44.1kHz.  They can record 8-bit samples at up to 44.1kHz.
     The UltraSound MAX is a full-duplex sound device, and if configured with two DRQ channels can be used for simultaneous playback and record-
     ing.  The I/O port base is jumper-selected, and may be chosen from 0x210-0x260 in steps of 0x10.  (The normal setting is 0x220.)  The GUS
     takes 16 ports at its base address and 8 ports at its base address + 0x100.

     The IRQ is software programmed, so you may select any IRQ from the set {3,5,7,9,11,12,15}.  The DRQ lines are software programmed, and may be
     chosen from {1,3,5,6,7}.  The drq2 field in the configuration file line specifies a second DRQ line for recording.  If there is no drq2 field
     in the config file, the playback channel will be used for recording DMA and only half-duplex mode will be available.

     The Gravis UltraSound MAX has an additional CODEC onboard which is addressed with four ports at an offset of 0x10C from the base ports
     (0x31C-0x36C).

SEE ALSO

     audio(4)

REFERENCES

     Gravis UltraSound Low-Level Toolkit, Revision 2.01, 20 May 1993, published by Advanced Gravis and Forte Technologies.

HISTORY

     The gus device driver appeared in NetBSD 1.1.

BUGS

     The full-duplex features of the GUS MAX have not been fully tested, and full-duplex on the original GUS may not be possible at all.

     Only two voices on the GF1 synthesizer chip are used by this driver (for left and right channels).

     Manipulating the mixer while audio samples are playing can lead to device driver confusion (and maybe even a system panic).

     Manipulating the mixer device seems to create pregnant system pauses, probably due to excessive interrupt masking.

     The joystick and MIDI port interfaces are not supported.

BSD
								   June 22, 2005							       BSD

Linux and UNIX Man Pages

sb(4) [netbsd man page]

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