在开发nios2时，当把nios2中写的程序烧录到用epcs4中时会报错，原因是找不到epcs的映射资料，把这个文件，放到quartus根目录的bin文件夹内后，再打开一次flash program，就能下载成功！,Nios2 in the development, when the procedures wrote nios2 writers to use when epcs4 in error, the use of this document, into the root director