When this table was first made in 2006, FP didn't support ramps, and it didn't have any native DMD, so a DMD engine was built from overlays. That engine is still in this table, but it is hidden by default, as when FP did get DMD native, it was converted to use it, but older PC's ran better with the overlays. It's an interesting thing to look through if you are into coding, but only really a curiosity these days. Just use the FP DMD, it looks better.
For years 1.3 has been the latest version, which had the FP DMD implemented. Now, fifteen years to the month after the first release, I have given it BAM physics and flippers.