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📁 浙江大学计算机学院计算机组成教材《计算机组成与设计》（潘学增）的课堂教学课件。
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<td width="11%">
  
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Read ALU</font></b></td>          
<td width="11%">          
        
  <p align="center"><b><font color="#000000" size="4">Write rt</font></b></td>       
<td width="11%">       
        
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="12%">
  
  <p align="center"><b><font color="#000000" size="4">Fetch</font></b></td>
</tr>
<tr>
  <td width="11%">
    
    <p align="center"><b><font color="#000000" size="4">SW2</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Add</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">rs</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Extend</font></b></td>
<td width="11%">
  
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Write ALU</font></b></td>          
<td width="11%">          
        
  <p align="center"><b><font color="#000000" size="4">Read rt</font></b></td>       
<td width="11%">       
        
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="12%">
  
  <p align="center"><b><font color="#000000" size="4">Fetch</font></b></td>
</tr>
</table>

<p><b><font color="#000000" size="4">指令1：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="50%" align="center"><b><font color="#000000" size="4">Field</font></b></td>
  <td width="50%" align="center"><b><font color="#000000" size="4">Effect</font></b></td>
</tr>
<tr>
  <td width="50%" align="center"><b><font color="#000000" size="4">ALU control,SRC1,SRC2</font></b></td>  
<td width="50%" align="center"><b><font color="#000000" size="4">Compute the memory address ; Register(rs)+sign-extend(IR[15-0])</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Use the second dispatch table to jump to   
  either LW2 or SW2</font></b></td>  
</tr>  
</table>  
 
<p><b><font color="#000000" size="4">指令2：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="50%" align="center"><b><font color="#000000" size="4">Field</font></b></td>
  <td width="50%" align="center"><b><font color="#000000" size="4">Effect</font></b></td>
</tr>
<tr>
  <td width="50%" align="center"><b><font color="#000000" size="4">ALU control,SRC1,SRC2</font></b></td>  
<td width="50%" align="center"><b><font color="#000000" size="4">The output of the ALU is still the memory   
  address</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Memory</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Read memory using the ALU output as address</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Go to the next microinstruction</font></b></td>  
</tr>  
</table>  
 
<p><b><font color="#000000" size="4">指令3：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="50%" align="center"><b><font color="#000000" size="4">Field</font></b></td>
  <td width="50%" align="center"><b><font color="#000000" size="4">Effect</font></b></td>
</tr>
<tr>
  <td width="50%" align="center"><b><font color="#000000" size="4">ALU control,SRC1,SRC2</font></b></td>  
<td width="50%" align="center"><b><font color="#000000" size="4">The output of the ALU is still the memory   
  address</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Memory</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Read memory using the ALU output as address   
  and the register designated by rt as the value to write</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Go to the microinstruction labeled Fetch</font></b></td>  
</tr>  
</table>  
 
<p><b><font color="#000000"><font size="4">我们可以合并第二和三条指令为</font></font></b><font color="#000000">：</font></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="11%" align="center"><b><font color="#000000" size="4">Label</font></b></td>
  <td width="11%" align="center"><b><font color="#000000" size="4">ALU control</font></b></td>  
<td width="11%" align="center"><b><font color="#000000" size="4">SRC1</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">SRC2</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">ALU destination</font></b></td>  
<td width="11%" align="center"><b><font color="#000000" size="4">Memory</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">Memory register</font></b></td>  
<td width="11%" align="center"><b><font color="#000000" size="4">PCWrite control</font> </b></td>  
<td width="12%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
</tr>
<tr>
  <td width="11%" align="center"><b><font color="#000000" size="4">LW2</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">Add</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">rs</font></b></td>
<td width="11%" align="center"><b><font color="#000000" size="4">Extend</font> </b></td>
<td width="11%" align="center"><font color="#000000" size="4">　</font></td>
<td width="11%" align="center"><b><font color="#000000" size="4">Read ALU</font></b></td>          
<td width="11%" align="center"><b><font color="#000000" size="4">Write rt</font></b></td>       
<td width="11%" align="center"><font color="#000000" size="4">　</font></td>
<td width="12%" align="center"><b><font color="#000000" size="4">Fetch</font></b></td>
</tr>
</table>

<p><font color="#000000" size="4">　</font></p>
<p><b><font color="#000000" size="4">指令4的解释如下：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="50%" align="center"><b><font color="#000000" size="4">Field</font></b></td>
  <td width="50%" align="center"><b><font color="#000000" size="4">Effect</font></b></td>
</tr>
<tr>
  <td width="50%" align="center"><b><font color="#000000" size="4">ALU control,SRC1,SRC2</font></b></td>  
<td width="50%" align="center"><b><font color="#000000" size="4">The output of the ALU is still the memory   
  address</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Memory</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Write memory using the ALU output as address   
  and the register designated by rt as the value to write</font></b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Go to the microinstruction labeled Fetch</font></b></td>  
</tr>  
</table>  
 
<p><b><font color="#000000" size="4">我们再来看看R型指令：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="11%">
      
      <p align="center"><b><font color="#000000" size="4">Label</font></b></td>
  <td width="11%">
    
    <p align="center"><b><font color="#000000" size="4">ALU control</font></b></td>  
<td width="11%">  
   
  <p align="center"><b><font color="#000000" size="4">SRC1</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">SRC2</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">ALU destination</font></b></td>  
<td width="11%">  
   
  <p align="center"><b><font color="#000000" size="4">Memory</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Memory register</font></b></td>  
<td width="11%">  
   
  <p align="center"><b><font color="#000000" size="4">PCWrite control</font></b></td>  
<td width="12%">  
   
  <p align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
</tr>
<tr>
  <td width="11%">
    
    <p align="center"><b><font color="#000000" size="4">Rformat1</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Func code</font></b></td>  
<td width="11%">  
   
  <p align="center"><b><font color="#000000" size="4">rs</font></b></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">rt</font></b></td>
<td width="11%" align="center">
  
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="11%" align="center">
  
  <p align="center">　</td>
<td width="11%" align="center">
  
  <p align="center">　</td>
<td width="11%" align="center">
  
  <p align="center">　</td>
<td width="12%" align="center">
  
  <p align="center"><b><font color="#000000" size="4">Seq</font></b></td>
</tr>
<tr>
  <td width="11%">
    
    <p align="center"><font color="#000000" size="4">　</font></td>
<td width="11%">
  
  <p align="center"><b><font color="#000000" size="4">Func code</font></b></td>          
<td width="11%">          
        
  <p align="center"><b><font color="#000000" size="4">rs</font></b></td>     
<td width="11%">     
       
  <p align="center"><b><font color="#000000" size="4">rt</font></b></td>     
<td width="11%" align="center">     
       
  <p align="center"><b><font color="#000000" size="4">rd</font></b></td>     
<td width="11%" align="center">     
       
  <p align="center"><font color="#000000" size="4">　</font></td>
<td width="11%" align="center">
  
  <p align="center">　</td>
<td width="11%" align="center">
  
  <p align="center">　</td>
<td width="12%" align="center">
  
  <p align="center"><b><font color="#000000" size="4">Fetch</font></b></td>
</tr>
</table>

<p><font color="#000000" size="4">　</font></p>
<p><b><font color="#000000" size="4">对于这两条的指令解释如下：</font></b></p>
<p><b><font color="#000000" size="4">指令1：</font></b></p>



<table border="1" width="100%" bordercolordark="#CC9966" bordercolorlight="#FFCC66">
  <tr>
    <td width="50%" align="center"><b><font color="#000000" size="4">Field</font></b></td>
  <td width="50%" align="center"><b><font color="#000000" size="4">Effect</font></b></td>
</tr>
<tr>
  <td width="50%" align="center"><b><font color="#000000" size="4">ALU control,SRC1,SRC2</font></b></td>  
<td width="50%" align="center"><b><font color="#000000" size="4">The ALU operates on the register contents of   
  the rs and rt registers ,using the func field to specify the ALU operation</font> </b></td>  
</tr>  
<tr>  
  <td width="50%" align="center"><b><font color="#000000" size="4">Sequencing</font></b></td>
<td width="50%" align="center"><b><font color="#000000" size="4">Go to the next microinstruction</font></b></td>  
</tr>  
</table>  
 
<p><font color="#000000" size="4">　</font></p>
<p><b><font color="#000000" size="4">指令2：</font></b></p>
123

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