This driver was hard to find. You will find that it works well on the PcChips M571 MoBo.(On Board Sound) I tried to use the supplied drivers from the manufacture but they didnt work. An error msg came up when Win98 was booted. This driver works but you have to manually install the driver as the auto setup doesnt work. Once installed the sound device works but under the Device Manager you will have an ! mark. Ignore this as you will already know the sound still works.
Hope this helps someone else out as it did me.
Good luck and let me know how you got on.