the powerpc405 is 300MHz, use FIFO interrupt mode,with no dma.so it's speed can be 600Mb/s accord to you? while now the speedis only 7Mb/s. What's the reason? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.rtems.org/pipermail/users/attachments/20070518/205f3cb2/attachment.html>