Yes, I am working on 440BX SDRAM support and still looking for a board
with
working SDRAM support in coreboot so I can borrow some ideas. The closest
I
find is i810 in MS6178 and that's also a WIP. I'll look some more but for now I know just programming the DRAM row boundary is not enough. Coreboot fails at decompressing its payload. BTW I have a dead MS6178 that I salvaged quite a few parts from. :-D
FYI, take a look at the i830 raminit. It works really slick.