This is the intermediate win3.1 upgrade to Sound blaster pro 2.
This upgrade in conjunction with the intermediate Dos sbp2du.exe upgrade
NB The final upgrade is sbp2up.exe
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.