<HTML><HEAD><TITLE>All_About_Your_64-Online-Help Version 0.64</TITLE></HEAD>
<BODY><PRE>

  +------------------------------------------------------------------------
  |
  |      SOUND INTERFACE DEVICE (SID) 6581
  |
  +------------------------------------------------------------------------
  |
  |  SID related topics:
  |
  |    <A HREF="SIDADR.HTM">ADR-Table</A>
  |    <A HREF="SIDMTH.HTM">SID-Mathmatics</A>
  |
  |  Register description:
  |
  |   <A HREF="SID0.HTM">$D400/54272/SID+0</A>       Voice 1: 