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Yeelong 8089B and 2GB DDR2 RAM?

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发表于 2011-11-29 15:45:54 | 显示全部楼层 |阅读模式
Hello again!

I just wanted to ask how to get the Yeeloong 8089B to accept 2GB memory instead of 1GB. I found information on the web saying that you need single-rank RAM to make it work. Now I have a single-rank 2GB stone (256x8C) which is rare enough, but it still won't work!

When i switch the machine on, it just turns itself off after a few seconds. PMON2000 doesn't even come up!

What can I do to make 2GB RAM work?

Thank you!
发表于 2011-11-29 17:01:22 | 显示全部楼层
本帖最后由 y2k_connect 于 2011-11-29 17:03 编辑

你需要单面2GB的ddr2内存条。
好像在龙芯2f的内存器中限制了,只能使用单面的ddr2内存条。
从龙芯2e开始,就只能使用单面内存条。
不知道龙芯3,能否支持双面内存条。
 楼主| 发表于 2011-11-29 21:21:09 | 显示全部楼层
The module is single-sided. Organization is 8 x 256MB chips in one rank/bank. See pictures:
发表于 2011-12-1 05:13:22 | 显示全部楼层
本帖最后由 y2k_connect 于 2011-12-1 05:14 编辑

只是猜测,可能龙芯2f集成的内存控制器,或者是PMON2000,不能识别该内存条。
http://dev.lemote.com/cgit/pmon.git/refs/ 处,有Fuloong-6003-DDR2-1G的PMON2000源码。也许,需要修改成2GB内存的PMON2000。

《内存条单面和双面的有区别吗?》http://zhidao.baidu.com/question/3966447
 楼主| 发表于 2011-12-4 06:44:38 | 显示全部楼层
I already feared that PMON2000 might be the problem. But frankly, I do not dare patch, recompile and flash the firmware. Thats very complex and extremely risky, so I'm not going to touch Lemotes PMON2000 firmware sourcecode..  I'm not good enough in hacking stuff like that.
发表于 2013-3-10 11:57:33 | 显示全部楼层
PMON not support!!!

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