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-ALS-007/ALS-100/ALS-200 based sound cards
-Support for sound cards based around the Avance Logic
-ALS-007/ALS-100/ALS-200 chip is included. These chips are a single
-chip PnP sound solution which is mostly hardware compatible with the
-Sound Blaster 16 card, with most differences occurring in the use of
-the mixer registers. For this reason the ALS code is integrated
-as part of the Sound Blaster 16 driver (adding only 800 bytes to the
-SB16 driver).
-To use an ALS sound card under Linux, enable the following options as
-modules in the sound configuration section of the kernel config:
- - 100% Sound Blaster compatibles (SB16/32/64, ESS, Jazz16) support
- - FM synthesizer (YM3812/OPL-3) support
- - standalone MPU401 support may be required for some cards; for the
- ALS-007, when using isapnptools, it is required
-Since the ALS-007/100/200 are PnP cards, ISAPnP support should probably be
-compiled in. If kernel level PnP support is not included, isapnptools will
-be required to configure the card before the sound modules are loaded.
-When using kernel level ISAPnP, the kernel should correctly identify and
-configure all resources required by the card when the "sb" module is
-inserted. Note that the ALS-007 does not have a 16 bit DMA channel and that
-the MPU401 interface on this card uses a different interrupt to the audio
-section. This should all be correctly configured by the kernel; if problems
-with the MPU401 interface surface, try using the standalone MPU401 module,
-passing "0" as the "sb" module's "mpu_io" module parameter to prevent the
-soundblaster driver attempting to register the MPU401 itself. The onboard
-synth device can be accessed using the "opl3" module.
-If isapnptools is used to wake up the sound card (as in 2.2.x), the settings
-of the card's resources should be passed to the kernel modules ("sb", "opl3"
-and "mpu401") using the module parameters. When configuring an ALS-007, be
-sure to specify different IRQs for the audio and MPU401 sections - this card
-requires they be different. For "sb", "io", "irq" and "dma" should be set
-to the same values used to configure the audio section of the card with
-isapnp. "dma16" should be explicitly set to "-1" for an ALS-007 since this
-card does not have a 16 bit dma channel; if not specified the kernel will
-default to using channel 5 anyway which will cause audio not to work.
-"mpu_io" should be set to 0. The "io" parameter of the "opl3" module should
-also agree with the setting used by isapnp. To get the MPU401 interface
-working on an ALS-007 card, the "mpu401" module will be required since this
-card uses separate IRQs for the audio and MPU401 sections and there is no
-parameter available to pass a different IRQ to the "sb" driver (whose
-inbuilt MPU401 driver would otherwise be fine). Insert the mpu401 module
-passing appropriate values using the "io" and "irq" parameters.
-The resulting sound driver will provide the following capabilities:
- - 8 and 16 bit audio playback
- - 8 and 16 bit audio recording
- - Software selection of record source (line in, CD, FM, mic, master)
- - Record and playback of midi data via the external MPU-401
- - Playback of midi data using inbuilt FM synthesizer
- - Control of the ALS-007 mixer via any OSS-compatible mixer programs.
- Controls available are Master (L&R), Line in (L&R), CD (L&R),
- DSP/PCM/audio out (L&R), FM (L&R) and Mic in (mono).
-Jonathan Woithe
-30 March 1998
-Modified 2000-02-26 by Dave Forrest, to add ALS100/ALS200
-Modified 2000-04-10 by Paul Laufer, to add ISAPnP info.
-Modified 2000-11-19 by Jonathan Woithe,
- - updated information for kernel 2.4.x.