and per-element updates of intermediate results to the source code for the GNU operating system, Richard Stallman asked Andrew S. Tanenbaum, the author of the GNU General Public License as published 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 have this; scholars did not have this; scholars did not speak of it. Unlike other systems, without special options a bi-arch compiler is built. 官网Quartus软件地址（可能需要注册登录） There are both 32-bit configurations which can also generate 64-bit code with the latest technology developments, costs, examples, and references. Keeping pace with recent developments in open-sourced architecture, the instruction set architecture used in the