1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
66 lines
3.7 KiB
Text
66 lines
3.7 KiB
Text
ALS-007/ALS-100/ALS-200 based sound cards
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=========================================
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Support for sound cards based around the Avance Logic
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ALS-007/ALS-100/ALS-200 chip is included. These chips are a single
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chip PnP sound solution which is mostly hardware compatible with the
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Sound Blaster 16 card, with most differences occurring in the use of
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the mixer registers. For this reason the ALS code is integrated
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as part of the Sound Blaster 16 driver (adding only 800 bytes to the
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SB16 driver).
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To use an ALS sound card under Linux, enable the following options as
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modules in the sound configuration section of the kernel config:
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- 100% Sound Blaster compatibles (SB16/32/64, ESS, Jazz16) support
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- FM synthesizer (YM3812/OPL-3) support
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- standalone MPU401 support may be required for some cards; for the
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ALS-007, when using isapnptools, it is required
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Since the ALS-007/100/200 are PnP cards, ISAPnP support should probably be
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compiled in. If kernel level PnP support is not included, isapnptools will
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be required to configure the card before the sound modules are loaded.
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When using kernel level ISAPnP, the kernel should correctly identify and
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configure all resources required by the card when the "sb" module is
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inserted. Note that the ALS-007 does not have a 16 bit DMA channel and that
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the MPU401 interface on this card uses a different interrupt to the audio
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section. This should all be correctly configured by the kernel; if problems
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with the MPU401 interface surface, try using the standalone MPU401 module,
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passing "0" as the "sb" module's "mpu_io" module parameter to prevent the
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soundblaster driver attempting to register the MPU401 itself. The onboard
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synth device can be accessed using the "opl3" module.
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If isapnptools is used to wake up the sound card (as in 2.2.x), the settings
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of the card's resources should be passed to the kernel modules ("sb", "opl3"
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and "mpu401") using the module parameters. When configuring an ALS-007, be
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sure to specify different IRQs for the audio and MPU401 sections - this card
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requires they be different. For "sb", "io", "irq" and "dma" should be set
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to the same values used to configure the audio section of the card with
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isapnp. "dma16" should be explicitly set to "-1" for an ALS-007 since this
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card does not have a 16 bit dma channel; if not specified the kernel will
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default to using channel 5 anyway which will cause audio not to work.
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"mpu_io" should be set to 0. The "io" parameter of the "opl3" module should
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also agree with the setting used by isapnp. To get the MPU401 interface
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working on an ALS-007 card, the "mpu401" module will be required since this
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card uses separate IRQs for the audio and MPU401 sections and there is no
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parameter available to pass a different IRQ to the "sb" driver (whose
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inbuilt MPU401 driver would otherwise be fine). Insert the mpu401 module
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passing appropriate values using the "io" and "irq" parameters.
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The resulting sound driver will provide the following capabilities:
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- 8 and 16 bit audio playback
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- 8 and 16 bit audio recording
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- Software selection of record source (line in, CD, FM, mic, master)
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- Record and playback of midi data via the external MPU-401
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- Playback of midi data using inbuilt FM synthesizer
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- Control of the ALS-007 mixer via any OSS-compatible mixer programs.
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Controls available are Master (L&R), Line in (L&R), CD (L&R),
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DSP/PCM/audio out (L&R), FM (L&R) and Mic in (mono).
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Jonathan Woithe
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jwoithe@physics.adelaide.edu.au
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30 March 1998
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Modified 2000-02-26 by Dave Forrest, drf5n@virginia.edu to add ALS100/ALS200
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Modified 2000-04-10 by Paul Laufer, pelaufer@csupomona.edu to add ISAPnP info.
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Modified 2000-11-19 by Jonathan Woithe, jwoithe@physics.adelaide.edu.au
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- updated information for kernel 2.4.x.
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