双口RAM 的乒乓存储结构（芯片型号CY7C09279） 应用场合为FPGA向双口RAM不断写入数据，PCI总线从RAM读取数据。[已调试验证]-Dual-port RAM, ping-pong memory structure (chip model CY7C09279) applications for the FPGA to the dual-port RAM write data continuously, PCI bus read data from RAM. [Debugging