OK. I bet ALL REV cards have DSP V2.01, and ALL non-REV cards with DSP V2.01 should work just like REV cards. ALL DSP V2.02 cards will have the DEAD SB/AdLib problem.
We need to gather info all around here, basically owners of REV and non-REV cards must check their cards DSP version. I bet this has more to do with DSP version than anything else.
So while we thought for a long time that this upgrade would only work in REV cards this issue probably has nothing to do with the boards revisions per se but with some chip revisions. The culprit seems to be the DSP version.
User on Vintage computer forums with same issue:
http://www.vintage-computer.com/vcforum/showt … v0-CT1350/page8