1Sound Blaster 16X Vibra addendum
2--------------------------------
3by Marius Ilioaea <mariusi@protv.ro>
4   Stefan Laudat  <stefan@asit.ro>
5
6Sat Mar 6 23:55:27 EET 1999
7
8			Hello again,
9	
10	Playing with a SB Vibra 16x soundcard we found it very difficult
11to setup because the kernel reported a lot of DMA errors and wouldn't
12simply play any sound.
13	A good starting point is that the vibra16x chip full-duplex facility
14is neither still exploited by the sb driver found in the linux kernel 
15(tried it with a 2.2.2-ac7), nor in the commercial OSS package (it reports
16it as half-duplex soundcard). Oh, I almost forgot, the RedHat sndconfig
17failed detecting it ;)
18	So, the big problem still remains, because the sb module wants a
198-bit and a 16-bit dma, which we could not allocate for vibra... it supports
20only two 8-bit dma channels, the second one will be passed to the module
21as a 16 bit channel, the kernel will yield about that but everything will
22be okay, trust us. 
23	The only inconvenient you may find is that you will have
24some sound playing jitters if you have HDD dma support enabled - but this
25will happen with almost all soundcards...
26
27	A fully working isapnp.conf is just here:
28
29<snip here>
30
31(READPORT 0x0203)
32(ISOLATE PRESERVE)
33(IDENTIFY *)
34(VERBOSITY 2)
35(CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING
36# SB 16 and OPL3 devices
37(CONFIGURE CTL00f0/-1 (LD 0
38(INT 0 (IRQ 5 (MODE +E)))
39(DMA 0 (CHANNEL 1))
40(DMA 1 (CHANNEL 3))
41(IO 0 (SIZE 16) (BASE 0x0220))
42(IO 2 (SIZE 4) (BASE 0x0388))
43(NAME "CTL00f0/-1[0]{Audio               }")
44(ACT Y)
45))
46
47# Joystick device - only if you need it :-/
48
49(CONFIGURE CTL00f0/-1 (LD 1
50(IO 0 (SIZE 1) (BASE 0x0200))
51(NAME "CTL00f0/-1[1]{Game                }")
52(ACT Y)
53))
54(WAITFORKEY)
55
56<end of snipping>
57
58	So, after a good kernel modules compilation and a 'depmod -a kernel_ver'
59you may want to:
60
61modprobe sb io=0x220 irq=5 dma=1 dma16=3
62
63	Or, take the hard way:
64
65modprobe soundcore
66modprobe sound
67modprobe uart401
68modprobe sb io=0x220 irq=5 dma=1 dma16=3
69# do you need MIDI?
70modprobe opl3=0x388
71
72	Just in case, the kernel sound support should be:
73
74CONFIG_SOUND=m
75CONFIG_SOUND_OSS=m
76CONFIG_SOUND_SB=m
77	
78	Enjoy your new noisy Linux box! ;)
79	
80
81