This is the final win/dos upgrade to Sound blaster pro 2.
This upgrade after installing the intermediate WFW sbp2wu.exe & Dos sbp2du.exe upgrades
Note You need to have installed Sbpro1-2.exe and Sbpro2-2.exe prior. These are the original setup discs. Self extracting versions of the same zip files on this site.
CT1600 printed along top edge of board. CT1336 chip on board.