On Mon, Feb 24, 2014 at 7:57 PM, G Jones <glenn.calt...@gmail.com> wrote: > Hi, > Sorry to repost this. Just curious if anyone has experience using more than > 256 MB of FPGA DRAM on the ROACH, in particular through the PPC interface.
The PowerPC's virtual memory subsystem maps things in 256Mb regions/segments, and only one is used to access the FPGA(*) - so you will probably have to implement some sort of windowing/base+offset scheme. (The address space of the PowerPC is pretty constrained) regards marc
