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I did a very quick pass at removing all the non-KMS support from the DDX. It's tested on G80 but nowhere else currently, I thought some discussion would be a good idea rather than just ripping it out :) The non-KMS paths are messy, and lets face it, rotting badly. IMO the KMS code is stable enough now that we can continue without the UMS crutch, and indeed, the KMS code supports a lot more