SNDRV_GF1_GB_VERSION_NUMBER
rev1 = snd_gf1_look8(gus, SNDRV_GF1_GB_VERSION_NUMBER);
snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, ~rev1);
rev2 = snd_gf1_look8(gus, SNDRV_GF1_GB_VERSION_NUMBER);
snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, rev1);
snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, 0x11);