SoundBlaster family audio device
sb0 at isa? port 0x220 irq 5 drq 1
sb1 at isa? port 0x240 irq 7 drq 1 flags 1
sb* at isapnp?
audio* at sb?
midi* at sb?
driver supports the 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
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
The configuration file must set the value of flags
to 1 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.
The joystick interface (if enabled by a jumper) is handled by the
driver, and the optional
SCSI CD-ROM interface is handled by the
device driver appeared in
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
The non-SCSI CD-ROM interfaces found on some older cards are not