I've made a patch to rename some of the unkXXX veriables in the command buffer initialization code to more descriptive names, based on the registers they use. There are still a few unknown variables left, but this is a start.
Created attachment 9056 [details] [review] Proposed patch
From my quick review the patch looks pretty good and should go in.
fix commmitted e64166703a27c5b1127373b1dff3b93e617bcaea
Mass version move, cvs -> git
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