RealTek ALC650 AC97 Codex driver for OS/2. Requires OS/2 Warp4, FP9 or later.
I have found a alternative driver for the Realtek ALC658 (AC97) chip and I have included it in this directory under the name ALC650_1.3.zip as it has worked for me.

From what I understand it is also compatable with the following chipsets:
supported chips:

ALC101
ALC201
ALC201A
ALC202
ALC202A
ALC203
ALC250
ALC650
ALC653
ALC655
ALC658 (one I am using)
ALC850