mini6410 only have 70MB memory.

On linux,free,top command are all display total 70MB memory.Where the more
than 50MB memory to go?u-boot or kernel use it ?How to release it and let
me use it in application level?

the Multimedia driver "eat" some memory, "dmesg" can show all the detail.

Sorry to ask you this question, but since you have the 6410,
can you tell me if you see a big difference in speed compare to the 2410

thanks in advance

@Patrick: You mean Mini2440?
I also would like to know if there is a big difference. But I think the
Mini6410 has better multimedia support. Depending on the operating system /
distribution and configuration (incl. drivers) you use.