I have create sopc system in Quartus with Pci express core, Dma controller and onchip RAM. This system is work well with size of RAM 8192. But when i increase size of memory to 16k the DMA have read and write only 8192 bytes. Width of the DMA length register is 32768 (i have change this value when i create progect). Example of this system is shown on picture. Who can help ? why the size limit of RAM is 8k ?