used logic elements increase rapidly!

I used cyclone III, which has about 64Kbytes of ram memory, and I have used less than 50%.

And the fifo which runs out my LEs is a dc-fifo which is used on my video pipeline. It uses 8K LEs instead of ram memory after I add a DMA.

The DMA's internal fifo is small, so it doesn't matter whether to use LEs or Ram resources.

I guess the fifo auto changes to use LEs while the system goes complex, so that it can get a better timing.