📄 经过验证的可以在basys上跑的risc8.htm

📁 已经测试过的RISC8的verilog源码和说明还包括编译环境和测试程序等
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          <TD class=article_title vAlign=top><SPAN class=art_title>2007-10-10 
            20:29:06 | 经过验证的可以在BASYS上跑的RISC8</SPAN></TD></TR>
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            <P>
            <P>这几天布置任务让我的学生们在BASYS上跑个MCU，当然，目地就是锻炼他们运用xilinx开发环境的能力，尽管我们要做的项目在BASYS 
            上是没法实现，但是，在比赛用板还没有发下来之前，可以用BASYS练练手，经历了6天的忙碌和克服重重困难，他们终于完成了任务，非常成功的让RISC8跑起来了，下面是我让学生写的这几天忙碌的感言，发到这里大家和分享！另外，我们跑起来的这个RISC8，一块共享给大家，大家也可以下载试试。以下就是他写的总结：</P>
            <P>&nbsp;&nbsp;&nbsp;&nbsp;</P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            style="FONT-FAMILY: 宋体">老师让跑个简单的MCU，以前我们在</SPAN><SPAN><FONT 
            face="Times New Roman">Altera</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">的</SPAN><SPAN><FONT 
            face="Times New Roman">FPGA</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">上做过类似的东西，而且当时那个</SPAN><SPAN><FONT 
            face="Times New Roman">PFGA</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">芯片的门数也正好是</SPAN><SPAN><FONT 
            face="Times New Roman">10</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">万门。所以，当时我们就想：跑的一个类似的</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">系列的内核应该不成问题。不过后来证明这样的一个经验似的论断是错误的，我们找到了一系列</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">系列的核，而且对它们的核做了很大的精简，不过很可惜，经过自己一阵修剪得到的</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">核在这块板子的</SPAN><SPAN><FONT 
            face="Times New Roman">FPGA</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">中还是跑不开，资源太少，几经周折放弃了</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">核。虽然对于</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">系列没有什么结果，但是收获还是非常大的，记得最初在</SPAN><SPAN><FONT 
            face="Times New Roman">Altera</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">的</SPAN><SPAN><FONT 
            face="Times New Roman">FPGA</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">中跑</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">的时候收获许多的东西，但是又有了一次新的经历尤其是碰壁之后，感觉到比上一次的收获多多了。华山并非一条路，放弃了</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">核，但是还可以从另外的一个方面入手，</SPAN><SPAN><FONT 
            face="Times New Roman">MCU</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">也并非</SPAN><SPAN><FONT 
            face="Times New Roman">51</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">一个啊！</SPAN><SPAN 
            style="FONT-FAMILY: 宋体">我们即而转向了采用</SPAN><SPAN><FONT 
            face="Times New Roman">RISC</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">指令集的</SPAN><SPAN><FONT 
            face="Times New Roman">RISC8</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">：</SPAN><SPAN 
            style="FONT-FAMILY: 宋体">我们所采用的</SPAN><SPAN><FONT 
            face="Times New Roman">RISC8</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">是一个免费的</SPAN><SPAN><FONT 
            face="Times New Roman">8</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">位处理器的核，它是用</SPAN><SPAN><FONT 
            face="Times New Roman">Verilog HDL </FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">实现的。它的二进制机器指令与单片机</SPAN><SPAN><FONT 
            face="Times New Roman">PIC16C57</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">的基本指令是兼容的。这个软核虽然给我们提供了</SPAN><SPAN><FONT 
            face="Times New Roman">PRAM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">作为</SPAN><SPAN><FONT 
            face="Times New Roman">ROM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体">，但是初始化</SPAN><SPAN><FONT
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