On Dec 10, 2007 10:19 AM, Corey Osgood <[EMAIL PROTECTED]> wrote: > aaron lwe wrote: > > Dear all, > > > > the via v-link bus is for data communication between northbridge and > > sourthbridge, > > if I just want to make dram work, do I need to configure the v-link bus? > > > > > thanks. > > No, vlink can be handled before or after ram init, and it isn't even > necessary, if no config is done it will default to the slowest operating > mode (newer chipsets may bootstrap to higher modes, depending on > motherboard design). However, you do have to program the CPU bus > registers and all the various dram config registers before ram init. > Getting these settings right may be a real pain, depending on what > chipset you're dealing with. > > -Corey >
Thanks Corey. I've been trying to make cn700 work, until now without luck. I've programmed host bus and some dram controller registers, but not all. how can I know which registers should be programmed and which needn't? can you give me some advices? thanks.
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