Template driver for a yamaha YMF719-S card

I’m trying to build an audio driver for my yamaha ISA PNP YMF719-S card
(normally compatible sb and Sigma-Delta Codec).
I’ve downloaded the ALSA 5.0 template driver on the QNX FTP site, but this
driver is quiet complete and complex. Moreover, it seems that this diver
doesn’t fit the documentation of the ddk audio kit (for example, it’s not
possible to find a ctrl_init() hook…).
For this reason, i’m looking for a simple template for the ISA PNP sound
card.
All suggestions are welcome and appreciated.

Regards

Alain Désandré.