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72 lines
4.2 KiB
Plaintext
72 lines
4.2 KiB
Plaintext
Nable 21.05.2008.
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This driver is my contribution (or donation) to KolibriOS. This is provided
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AS IS in hope it'll be useful, but WITHOUT ANY WARRANTY! No responcibility
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for any hardware damage or data loss. Use at your own risk!
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;-------------------------------------------------------------------------------
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;Changelog:
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;-------------------------------------------------------------------------------
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v0.2 - DEV_SET(GET)_MASTERVOL functions are unlocked and implemented.
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v0.1 - first release.
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;-------------------------------------------------------------------------------
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;Tiny FAQ for sound driver by Nable for SB16 sound card.
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;-------------------------------------------------------------------------------
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;What is it?--------------------------------------------------------------------
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As you may know there is a sound subsystem ('INFINITY') in KolibriOS.
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This subsystem includes mixer and separate interface for soundplayer
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program and driver, so player application don't need to know what soundcard
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is installed and how to cope with it, all work with card do the driver.
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Before this time there were drivers only for AC97 integrated sound, but I
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don't have such at home and if I would upgrade my computer with a newest
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hardware, with 100% probability integrated sound will be HD Codec, nowadays
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AC97 is not actual (2008 year is at calendar). But I'm not planning to upgrade
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my computer so much now (and in next 5-6 years), writing the driver for my PCI
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ESS Maestro1 card is difficult for me (may be some time later), so I decided
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to write a driver for SB16. At first it is easy, there are many working
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examples for DOS, there are heaps of good documentation and as an ISA device
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SB16 can be programmed through I/O ports (about 5 ports are used), that is
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more easy than PCI access. Now, enough lirics, lets go to physics :-)
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If you still don't understand what stuff is it, I'll tell this in brief:
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with this driver you can play MP3 and WAV music (using AC97SND player) and
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sounds (some games and DOSBOX can produce sound output through sound
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subsystem) in KolibriOS.
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;Yeah! I need sound in Kolibri and I have SB16 card. Whats then?----------------
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At first copy my SOUND.OBJ to /sys/drivers at your Kolibri system. Note,
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that if you have AC97 card and it's driver started - then new driver won't
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run until reboot. Then run BOARD and go to 'user' tab. Then try to run
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AC97SND player. At BOARD you will see the following (if you had a proper
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card):
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|----------------------------|
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|detecting hardware... | <- detector startup message
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|DSP found at port 220h | <- if you have a proper card, it'll be
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|DSP version 4.13 - SB16 | autodetected. Numbers may be different.
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|failed to attach IRQ5 | <- don't mention. Old kernels reserve IRQ5
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|owner's handler: 0x80D74284 | see below how to fix it.
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|----------------------------|
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At first, note that DSP version must be 4.xx or higher. Older cards are not
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supported in this first release, maybe some time later. If nothing detected
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but PNP/BIOS or some other OS detects your card - I'm sorry, it's perverted
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PNP card like OPTi16, that is like HD Codec - until you init it through
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PCI->ISA bridge (HD Codec of course through PCI->PCI bridge), map it, etc,
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you can't use it in any way. I'd rather write a PCI device driver, than
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for this extreme perversion. If your card detected and has a proper version
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but you see 'failed to attach IRQ' - delete stroke 'mov [irq_owner+4*5],1' from the
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file kernel.asm of your kernel source, save it, rebuild kernel, copy new
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kernel to /sys/ (did you rename 'kernel' to 'kernel.mnt'? You should do it),
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restart kernel (Ctrl+Alt+F12, Home). THE EASIER WAY IS TO USE A NEWER KERNEL,
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since SVN802 it's fixed.
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Now everything should be OK.
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;It works for a part of the second and then stops, but system doesn't hang------
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Go to 'config.inc' of my driver and change 'sb_irq_num' value from 5 to 7.
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Then save, rebuild driver (compile 'sound.asm'), put 'sound' to /sys/drivers/
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(you need to rename file 'sound' to 'sound.obj'), restart kernel and try again
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to produce sound.
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;-------------------------------------------------------------------------------
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Ask your questions at KolibriOS forum: board.kolibrios.org
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I'll try to answer you if possible. |