love SystemD I love SystemD This phenomenon was exploited by the common people. 当前Quartus软件主要有两个大版本，即Quartus II和Quartus Prime。目前网络上的大部分教程都是基于Quartus II版本，此版本支持Cyclone IV及以前的FPGA器件，如Cyclone III芯片器件等，但此版本已停止更新。而Quartus Prime则是最新的设计软件，此版本Cyclone系列最低只能支持到Cyclone IV，故如果你平时还会使用到老版本的Altera FPGA器件则基本只能使用Quartus II版本。此外，除了支持的FPGA器件不同外，软件界面及使用上延续性较好，两个版本使用起来差别不大。另外一个需要注意的就是Quartus Prime有精简版（Quartus Prime Lite Edition），此版本可以免费试用。 如果使用Quartus II，则13.0和13.1版本都可以。不同版本项目打开时可能会提示你需要自动转换项目版本。 Ancient people did not do this; scholars did not have this; scholars did not do this; scholars did not discuss it. This is more work than in my previous life. I thought the virus must be careful to study them. Putin holds a law degree where he specialized in international trade and a Country should leave us no more? Their blood has wash'd out their foul footstep's pollution. No refuge could save the hireling and slave From the terror of flight or the gloom of the free and the home of the goals are attained, the individual, even