 command MOV AL,[25] the 25 is a pointer to the RAM location with 
      address 25. See indirection.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Ports</strong></td>
    <td>Input Output Ports. Peripherals are connected to ports. The IN and OUT 
      machine instructions are used to communicate with the peripherals.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Procedures</strong></td>
    <td>Small, modular, self contained, easily tested, code fragments that can 
      be used many ti