On Mon, 25 Apr 2011 16:56:58 +0800 项宇 <xia...@lemote.com> wrote: > The preliminary conclusions is: > 1. Fuloong can't support 2GB RAM with 2 Ranks(up to now, only one > special model works fine) > 2. Fuloong can support some 2GB RAM with 1 Rank.(but no warranty > about the stablility) > > The 2.6.38 kernel may need little change to support 2GB RAM
Thank you very much! My Fuloong now boots successfully with your patch on 2.6.38.3 and a dual-rank 2GB DDR2-800 module from Hynix (8+8=16 chips). It seems to work ok, I am running "memtester" now to check stability, no errors so far. My guess is that dual-rank module can work here because FL6004 has a different board design than your FL6003: the DDR2 slot here is turned 180 degrees, so the row of contacts of DDR2 is much closer to the Loongson2F chip: * FL6003: http://romanrm.ru/mirrors/lemote-unbox/0438.jpg * FL6004: http://media.romanrm.ru/loongson/pics/fuloong2f-6004/sideB-take1.jpg (sorry I don't have a proper photo camera :D) Perhaps that change was enough to allow dual rank sticks to work properly? > They have fix these problem since 2009, but Fuloong&Yeeloong is designed > earlier. Right, I also tested on the Yeeloong, but it does not even turn-on with a dual rank 2GB or 4GB stick. -- With respect, Roman
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