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Sound Blaster 16X Vibra addendum

--------------------------------

by Marius Ilioaea 

   Stefan Laudat  

Sat Mar 6 23:55:27 EET 1999

                        Hello again,

        Playing with a SB Vibra 16x soundcard we found it very difficult

to setup because the kernel reported a lot of DMA errors and wouldn't

simply play any sound.

        A good starting point is that the vibra16x chip full-duplex facility

is neither still exploited by the sb driver found in the linux kernel

(tried it with a 2.2.2-ac7), nor in the commercial OSS package (it reports

it as half-duplex soundcard). Oh, I almost forgot, the RedHat sndconfig

failed detecting it ;)

        So, the big problem still remains, because the sb module wants a

8-bit and a 16-bit dma, which we could not allocate for vibra... it supports

only two 8-bit dma channels, the second one will be passed to the module

as a 16 bit channel, the kernel will yield about that but everything will

be okay, trust us.

        The only inconvenient you may find is that you will have

some sound playing jitters if you have HDD dma support enabled - but this

will happen with almost all soundcards...

        A fully working isapnp.conf is just here:

(READPORT 0x0203)

(ISOLATE PRESERVE)

(IDENTIFY *)

(VERBOSITY 2)

(CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING

# SB 16 and OPL3 devices

(CONFIGURE CTL00f0/-1 (LD 0

(INT 0 (IRQ 5 (MODE +E)))

(DMA 0 (CHANNEL 1))

(DMA 1 (CHANNEL 3))

(IO 0 (SIZE 16) (BASE 0x0220))

(IO 2 (SIZE 4) (BASE 0x0388))

(NAME "CTL00f0/-1[0]{Audio               }")

(ACT Y)

))

# Joystick device - only if you need it :-/

(CONFIGURE CTL00f0/-1 (LD 1

(IO 0 (SIZE 1) (BASE 0x0200))

(NAME "CTL00f0/-1[1]{Game                }")

(ACT Y)

))

(WAITFORKEY)

        So, after a good kernel modules compilation and a 'depmod -a kernel_ver'

you may want to:

modprobe sb io=0x220 irq=5 dma=1 dma16=3

        Or, take the hard way:

insmod soundcore

insmod sound

insmod uart401

insmod sb io=0x220 irq=5 dma=1 dma16=3

# do you need MIDI?

insmod opl3=0x388

        Just in case, the kernel sound support should be:

CONFIG_SOUND=m

CONFIG_SOUND_OSS=m

CONFIG_SOUND_SB=m

        Enjoy your new noisy Linux box! ;)