[alsa-devel] [PATCH] opti931: additional check for OPL3 device

Clemens Ladisch cladisch at fastmail.net
Fri Sep 14 16:52:47 CEST 2007

Krzysztof Helt wrote:
> This patch adds additional check for OPL3 device. I found that PNP
> region returned by the card is 0x380 - 0x38f but the OPL3 device is
> located at 0x388 (standard FM device address).

On cards with an OPL4, it would use the entire range, where that last
eight bytes are the OPL3-compatible registers.

AFAIK the opti93x chips have an integrated OPL3 and cannot be used
with an OPL4.

> If someone can test if the opti92x PnP has the same problem I would be
> grateful.

My card doesn't have PnP, but I guess the OPL4 detection wouldn't work
on 92x either for the same reason.


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