AD1815 & AD1816 SoundPort Controller
If I am correct, I think the sound card connects to the computer useing a ISA Bus.
I've heard rumors that this works on windows 98 but i have no way of confirming this.
The files where in a floppy disk with the DOS, WIN32, WIN95 and MRACK in the root of the drive.
The disk label reads:
Audio 1815 Driver
MS Windows 31
MS Windows 95