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  <p><font size="2" face="Times New Roman, Times, serif"><b>As filed with the Securities
    and Exchange Commission on December 23, 2003 </b></font></p>
  <P ALIGN="right"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Registration
    No. 333-____________</B></FONT></FONT></P>
  
  
  <hr size="4" noshade>
  <P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3"><b>UNITED
    STATES SECURITIES AND EXCHANGE COMMISSION<br>
    </b></FONT></FONT><b><FONT size="3" FACE="Times New Roman, Times, Serif">Washington,
    D.C. 20549</FONT> </b></P>
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3">FORM
    S-8</FONT></FONT></b></P>
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3">REGISTRATION
    STATEMENT UNDER THE SECURITIES ACT OF 1933</FONT></FONT></b></P>
  
  
  <hr align="center" width="200" size="1" noshade>
  <p ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="5">RADISYS
    CORPORATION<br>
    </FONT></FONT></b><font size="2" face="Times New Roman, Times, serif">(Exact
    name of registrant as specified in its charter)</font></p>
  <table width="100%"  border="0" cellspacing="0" cellpadding="3">
    <tr align="center" valign="bottom">
      <td width="35%"><font size="2" face="Times New Roman, Times, serif">Oregon</font><font face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td width="35%"><font size="2" face="Times New Roman, Times, serif">93-0945232</font></td>
    </tr>
    <tr align="center" valign="top">
      <td><font size="2" face="Times New Roman, Times, serif">(State or other jurisdiction
        of <br>
        incorporation or organization)</font><font face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td><p><font size="2" face="Times New Roman, Times, serif">(I.R.S. Employer
          Identification No.) </font></p></td>
    </tr>
  </table>
  <p align="center"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">5445
    NE Dawson Creek Drive<br>
    </FONT></FONT><FONT size="2" FACE="Times New Roman, Times, serif">Hillsboro,
    Oregon 97124<br>
    (Address of principal executive offices, including zip code)</FONT> </p>
  <hr align="center" width="200" size="1" noshade>
  <p ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><b>RadiSys
    Corporation 401(k) Savings Plan</b><br>
    </FONT></FONT><font size="2" face="Times New Roman, Times, serif">(Full title
    of the plan) </font> </p>
  
  
  <P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Julia
    A. Harper<br>
    </FONT></FONT><font size="2" face="Times New Roman, Times, serif">Chief Financial
    Officer, Vice President of Finance and Administration and Secretary<br>
    </font><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">RadiSys Corporation<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">5445
    NE Dawson Creek Drive<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Hillsboro,
    Oregon 97124<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">(503)
    615-1100<br>
    </FONT></FONT><font size="2" face="Times New Roman, Times, serif">(Name, address
    and telephone number, including area code, of agent for service) </font></P>
  <p align="center"><font size="2" face="Times New Roman, Times, serif">with a copy
    to:<br>
    </font><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Daniel W. Rabun<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Baker
    &amp; McKenzie<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">2001
    Ross Avenue, Suite 2300<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Dallas,
    Texas 75201</FONT></FONT></p>
  <P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">CALCULATION
  OF REGISTRATION FEE</FONT></FONT></P>
  
  <table width="100%"  border="0" cellspacing="0" cellpadding="3">
    <tr align="center">
      <td colspan="5"> <hr size="3" noshade> </td>
    </tr>
    <tr align="center">
      <td><font size="2" face="Times New Roman, Times, serif"> Title of Each Class
        of <br>
        Securities to be Registered<br>
        </font></td>
      <td><font size="2" face="Times New Roman, Times, serif"> Amount to be <br>
        Registered (1)(3)<br>
        </font></td>
      <td><font size="2" face="Times New Roman, Times, serif"> Proposed Maximum
        <br>
        Offering Price Per <br>
        Share (2) <br>
        </font></td>
      <td><font size="2" face="Times New Roman, Times, serif"> Proposed Maximum
        <br>
        Aggregate Offering<br>
        Price (2) <br>
        </font></td>
      <td><font size="2" face="Times New Roman, Times, serif"> Amount of <br>
        Registration<br>
        Fee </font></td>
    </tr>
    <tr align="center">
      <td colspan="5"> <hr size="3" noshade> </td>
    </tr>
    <tr align="center">
      <td><font size="2" face="Times New Roman, Times, serif">401(k) SAVINGS PLAN
        <br>
        &nbsp;&nbsp;Common Stock, no par value</font></td>
      <td><font size="2" face="Times New Roman, Times, serif">150,000 shares</font></td>
      <td><font size="2" face="Times New Roman, Times, serif">$16.42</font></td>
      <td><font size="2" face="Times New Roman, Times, serif">$2,463,000</font></td>
      <td><font size="2" face="Times New Roman, Times, serif">$200</font></td>
    </tr>
    <tr align="center">
      <td colspan="5"><hr size="1" noshade>
        </td>
    </tr>
  </table>
  <P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">(1)
    The shares of common stock of RadiSys Corporation being registered consist of
    shares to be acquired in open market purchases under the employee benefit plan
    described herein.<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">(2)
    Estimated solely for purposes of calculating the registration fee pursuant to
    Rule 457 (c) and (h) under the Securities Act of 1933. The price is based upon
    the average of the high and low prices of RadiSys Corporation common stock on
    December&nbsp;19, 2003, as reported on the Nasdaq National Market.<br>
    </FONT></FONT><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">(3)
    Pursuant to Rule 416(c) under the Securities Act of 1933, this registration
    statement also covers an indeterminate amount of interests to be offered or
    sold pursuant to the employee benefit plan described herein.</FONT></FONT> </P><hr width="100%" size="2">
  <P align="left" style="page-break-before:always">&nbsp;</P>
  
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">EXPLANATORY
    STATEMENT</FONT></FONT></b></P>
  
  <P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">This
  registration statement is filed pursuant to General Instruction E to Form S-8 by
  RadiSys Corporation, an Oregon corporation, in order to register 150,000 shares
  of common stock, which shares are in addition to those previously registered on
  the Registration Statement on Form S-8 (File No. 333-50584) filed with the
  Securities and Exchange Commission (the &quot;Commission&quot;) on November 24,
  2000, for use in connection with the RadiSys Corporation 401(k) Savings Plan
  (the &quot;Plan&quot;). The contents of the Registration Statement on Form S-8
  (File No. 333-50584) previously filed with the Commission on November 24, 2000,
  are incorporated herein by reference.</FONT></FONT> </P>
  
  
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">PART
    II</FONT></FONT></b></P>
  
  
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">INFORMATION
    REQUIRED IN THE REGISTRATION STATEMENT</FONT></FONT></b></P>
  
  
  <P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Item
    8. Exhibits</FONT></FONT></P>
  
  <table width="100%"  border="0" cellspacing="0" cellpadding="3">
    <tr valign="bottom">
      <td width="10%" align="center"><font size="2" face="Times New Roman, Times, serif">Exhibit<br>
        <u>Number</u></font></td>
      <td width="5%">&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr valign="top">
      <td align="center"><font size="2" face="Times New Roman, Times, serif">23</font></td>
      <td>&nbsp;</td>
      <td><font size="2" face="Times New Roman, Times, serif">Consent of PricewaterhouseCoopers
        LLP</font></td>
    </tr>
    <tr valign="top">
      <td align="center"><font size="2" face="Times New Roman, Times, serif">24</font></td>
      <td>&nbsp;</td>
      <td><font size="2" face="Times New Roman, Times, serif"> Powers of Attorney
        </font> </td>
    </tr>
  </table>
  <P ALIGN="LEFT">&nbsp;</P>
  
  <P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">The registrant
  undertakes that the registrant will submit or has submitted the Plan and all
  amendments thereto to the Internal Revenue Service (&quot;IRS&quot;) in a timely
  manner and has made or will make all changes required by the IRS in order to
  qualify the Plan.</FONT></FONT> </P>
  
  
  
  
  
  
  <hr width="100%" size="2">
  <P align="left" style="page-break-before:always">&nbsp;</P>
  <P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><b>SIGNATURES</b></FONT></FONT></P>
  
  <P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Pursuant
    to the requirements of the Securities Act of 1933, the registrant certifies
    that it has reasonable grounds to believe that it meets all of the requirements
    for filing on Form S-8 and has duly caused this Registration Statement to be
    signed on its behalf by the undersigned, thereunto duly authorized, in the City
    of Hillsboro, State of Oregon, on this 23rd day of December, 2003.</FONT></FONT></P>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td colspan="2" nowrap><font face="Times New Roman, Times, serif" size="2">RADISYS
        CORPORATION</font></td>
    </tr>
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td width="3%" nowrap>&nbsp;</td>
      <td nowrap>&nbsp;</td>
    </tr>
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td width="3%" nowrap><font face="Times New Roman, Times, serif" size="2">By:&nbsp;</font></td>
      <td nowrap><font size="2" face="Times New Roman, Times, serif"><u>/s/ Scott
        C. Grout&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u></font></td>
    </tr>
    <tr valign="top">
      <td nowrap>&nbsp;</td>
      <td nowrap>&nbsp;</td>
      <td nowrap><font size="2" face="Times New Roman, Times, serif">Scott C. Grout,
        President, Chief Executive Officer and Director</font></td>
    </tr>
  </table>
  <P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Pursuant
    to the requirements of the Securities Act of 1933, this Registration Statement
    has been signed by the following persons in the capacities and on the date indicated.</FONT></FONT></P>
  <table width="100%"  border="0" cellspacing="0" cellpadding="3">
    <tr>
      <td width="30%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><u>Name</u></FONT></FONT></td>
      <td width="5%">&nbsp;</td>
      <td><u><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Title</FONT></FONT></u></td>
      <td width="5%">&nbsp;</td>
      <td width="30%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><u>Date</u></FONT></FONT></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Scott C. Grout<br>
        </font> <hr width="200" size="1" noshade> <font size="2" face="Times New Roman, Times, serif">Scott
        C. Grout</font><br> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">President,
        Chief Executive Officer and Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Julia A. Harper<br>
        </font> <hr width="200" size="1" noshade> <font size="2" face="Times New Roman, Times, serif">Julia
        A. Harper</font> <font size="2" face="Times New Roman, Times, serif">&nbsp; </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Chief
        Financial Officer, Vice President of Finance and Administration and Secretary</font><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif"> December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        C. Scott Gibson*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">C.
        Scott Gibson</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Chairman
        of the Board and Director</font><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Ken J. Bradley*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Ken
        J. Bradley</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Richard J. Faubert*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Richard
        J. Faubert</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Dr. William W. Lattin*<br>
        </font> <hr width="200" size="1" noshade> <font size="2" face="Times New Roman, Times, serif">Dr.
        William W. Lattin</font> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Kevin C. Melia*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Kevin
        C. Melia</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Carl W. Neun*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Carl
        W. Neun</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Jean-Pierre D. Patkay*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Jean-Pierre
        D. Patkay</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">/s/
        Jean-Claude Peterschmitt*<br>
        </font> <hr width="200" size="1" noshade> <FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Jean-Claude
        Peterschmitt</FONT></FONT> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">Director</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">December
        23, 2003</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom">&nbsp;</td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
    <tr>
      <td align="center" valign="bottom"><font size="2" face="Times New Roman, Times, serif">*
        By /s/ Scott C. Grout<br>
        </font> <hr width="200" size="1" noshade> <font size="2" face="Times New Roman, Times, serif">
        Scott C. Grout, as attorney-in-fact</font> <font size="2" face="Times New Roman, Times, serif">&nbsp;
        </font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
      <td>&nbsp;</td>
      <td valign="top"><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    </tr>
  </table>
  <p>&nbsp;</p><hr width="100%" size="2">
  <P align="left" style="page-break-before:always">&nbsp;</P>
  <P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Pursuant
    to the requirements of the Securities Act of 1933, the trustees (or other persons
    who administer the Plan) have duly caused this Registration Statement to be
    signed on its behalf by the undersigned, thereunto duly authorized, in the City
    of Hillsboro, State of Oregon, on December </FONT><font size="2" face="Times New Roman, Times, serif">23</font><FONT SIZE="2">,
    2003.</FONT></FONT> </P>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td colspan="2" nowrap><font face="Times New Roman, Times, serif" size="2">RADISYS CORPORATION 401(k) SAVINGS PLAN</font></td>
    </tr>
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td width="3%" nowrap>&nbsp;</td>
      <td nowrap>&nbsp;</td>
    </tr>
    <tr valign="top">
      <td width="60%" nowrap>&nbsp;</td>
      <td width="3%" nowrap><font face="Times New Roman, Times, serif" size="2">By:&nbsp;</font></td>
      <td nowrap><font size="2" face="Times New Roman, Times, serif"><u>/s/ Julia
        A. Harper&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u></font></td>
    </tr>
    <tr valign="top">
      <td nowrap>&nbsp;</td>
      <td nowrap>&nbsp;</td>
      <td nowrap><font size="2" face="Times New Roman, Times, serif">Julia A. Harper,
  Administrative Committee Member</font></td>
    </tr>
  </table>
  <P ALIGN="LEFT">&nbsp;</P><hr width="100%" size="2">
  <P align="left" style="page-break-before:always">&nbsp;</P>
  
  <P ALIGN="CENTER"><b><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">EXHIBIT
    INDEX</FONT></FONT></b></P>
  
  
  <table width="100%"  border="0" cellspacing="0" cellpadding="3">
    <tr valign="bottom">
      <td width="10%" align="center"><font size="2" face="Times New Roman, Times, serif">Exhibit<br>
        <u>Number</u></font></td>
      <td width="5%">&nbsp;</td>
      <td><u><font size="2" face="Times New Roman, Times, serif">Description</font></u></td>
    </tr>
    <tr valign="top">
      <td align="center"><font size="2" face="Times New Roman, Times, serif">23</font></td>
      <td>&nbsp;</td>
      <td><font size="2" face="Times New Roman, Times, serif">Consent of PricewaterhouseCoopers
        LLP</font></td>
    </tr>
    <tr valign="top">
      <td align="center"><font size="2" face="Times New Roman, Times, serif">24</font></td>
      <td>&nbsp;</td>
      <td><font size="2" face="Times New Roman, Times, serif"> Powers of Attorney
        </font> </td>
    </tr>
  </table>
  <P ALIGN="LEFT">&nbsp;</P>
  
  <hr width="100%" size="2">
  
  
  </body>
  </html>
metadata_documents: [{"type": "S-8", "sequence": "1", "filename": "e300830_s8-radisys.htm", "description": "REGISTRATION STATEMENT", "secsgml_size_bytes": 24450}]
metadata_filer: {"company-data": {"conformed-name": "RADISYS CORP", "cik": "0000873044", "assigned-sic": "3577", "irs-number": "930945232", "state-of-incorporation": "OR", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-111520", "film-number": "031071717"}, "business-address": {"street1": "5445 NE DAWSON CREEK DR", "city": "HILLSBORO", "state": "OR", "zip": "97124", "phone": "5036461800"}, "mail-address": {"street1": "5445 NE DAWSON CREEK DRIVE", "city": "HILLSBORO", "state": "OR", "zip": "97124"}}
text: Untitled Document
  As filed with the Securities
    and Exchange Commission on December 23, 2003
  Registration
    No. 333-____________
  UNITED
    STATES SECURITIES AND EXCHANGE COMMISSION
  Washington,
    D.C. 20549
  FORM
    S-8
  REGISTRATION
    STATEMENT UNDER THE SECURITIES ACT OF 1933
  RADISYS
    CORPORATION
  (Exact
    name of registrant as specified in its charter)
  Oregon
  93-0945232
  (State or other jurisdiction
        of
  incorporation or organization)
  (I.R.S. Employer
          Identification No.)
  5445
    NE Dawson Creek Drive
  Hillsboro,
    Oregon 97124
  (Address of principal executive offices, including zip code)
  RadiSys
    Corporation 401(k) Savings Plan
  (Full title
    of the plan)
  Julia
    A. Harper
  Chief Financial
    Officer, Vice President of Finance and Administration and Secretary
  RadiSys Corporation
  5445
    NE Dawson Creek Drive
  Hillsboro,
    Oregon 97124
  (503)
    615-1100
  (Name, address
    and telephone number, including area code, of agent for service)
  with a copy
    to:
  Daniel W. Rabun
  Baker
    & McKenzie
  2001
    Ross Avenue, Suite 2300
  Dallas,
    Texas 75201
  CALCULATION
  OF REGISTRATION FEE
  Title of Each Class
        of
  Securities to be Registered
  Amount to be
  Registered (1)(3)
  Proposed Maximum
  Offering Price Per
  Share (2)
  Proposed Maximum
  Aggregate Offering
  Price (2)
  Amount of
  Registration
  Fee
  401(k) SAVINGS PLAN
  Common Stock, no par value
  150,000 shares
  $16.42
  $2,463,000
  $200
  (1)
    The shares of common stock of RadiSys Corporation being registered consist of
    shares to be acquired in open market purchases under the employee benefit plan
    described herein.
  (2)
    Estimated solely for purposes of calculating the registration fee pursuant to
    Rule 457 (c) and (h) under the Securities Act of 1933. The price is based upon
    the average of the high and low prices of RadiSys Corporation common stock on
    December 19, 2003, as reported on the Nasdaq National Market.
  (3)
    Pursuant to Rule 416(c) under the Securities Act of 1933, this registration
    statement also covers an indeterminate amount of interests to be offered or
    sold pursuant to the employee benefit plan described herein.
  EXPLANATORY
    STATEMENT
  This
  registration statement is filed pursuant to General Instruction E to Form S-8 by
  RadiSys Corporation, an Oregon corporation, in order to register 150,000 shares
  of common stock, which shares are in addition to those previously registered on
  the Registration Statement on Form S-8 (File No. 333-50584) filed with the
  Securities and Exchange Commission (the "Commission") on November 24,
  2000, for use in connection with the RadiSys Corporation 401(k) Savings Plan
  (the "Plan"). The contents of the Registration Statement on Form S-8
  (File No. 333-50584) previously filed with the Commission on November 24, 2000,
  are incorporated herein by reference.
  PART
    II
  INFORMATION
    REQUIRED IN THE REGISTRATION STATEMENT
  Item
    8. Exhibits
  Exhibit
  Number
  23
  Consent of PricewaterhouseCoopers
        LLP
  24
  Powers of Attorney
  The registrant
  undertakes that the registrant will submit or has submitted the Plan and all
  amendments thereto to the Internal Revenue Service ("IRS") in a timely
  manner and has made or will make all changes required by the IRS in order to
  qualify the Plan.
  SIGNATURES
  Pursuant
    to the requirements of the Securities Act of 1933, the registrant certifies
    that it has reasonable grounds to believe that it meets all of the requirements
    for filing on Form S-8 and has duly caused this Registration Statement to be
    signed on its behalf by the undersigned, thereunto duly authorized, in the City
    of Hillsboro, State of Oregon, on this 23rd day of December, 2003.
  RADISYS
        CORPORATION
  By:
  /s/ Scott
        C. Grout
  Scott C. Grout,
        President, Chief Executive Officer and Director
  Pursuant
    to the requirements of the Securities Act of 1933, this Registration Statement
    has been signed by the following persons in the capacities and on the date indicated.
  Name
  Title
  Date
  /s/
        Scott C. Grout
  Scott
        C. Grout
  President,
        Chief Executive Officer and Director
  December
        23, 2003
  /s/
        Julia A. Harper
  Julia
        A. Harper
  Chief
        Financial Officer, Vice President of Finance and Administration and Secretary
  December
        23, 2003
  /s/
        C. Scott Gibson*
  C.
        Scott Gibson
  Chairman
        of the Board and Director
  December
        23, 2003
  /s/
        Ken J. Bradley*
  Ken
        J. Bradley
  Director
  December
        23, 2003
  /s/
        Richard J. Faubert*
  Richard
        J. Faubert
  Director
  December
        23, 2003
  /s/
        Dr. William W. Lattin*
  Dr.
        William W. Lattin
  Director
  December
        23, 2003
  /s/
        Kevin C. Melia*
  Kevin
        C. Melia
  Director
  December
        23, 2003
  /s/
        Carl W. Neun*
  Carl
        W. Neun
  Director
  December
        23, 2003
  /s/
        Jean-Pierre D. Patkay*
  Jean-Pierre
        D. Patkay
  Director
  December
        23, 2003
  /s/
        Jean-Claude Peterschmitt*
  Jean-Claude
        Peterschmitt
  Director
  December
        23, 2003
  *
        By /s/ Scott C. Grout
  Scott C. Grout, as attorney-in-fact
  Pursuant
    to the requirements of the Securities Act of 1933, the trustees (or other persons
    who administer the Plan) have duly caused this Registration Statement to be
    signed on its behalf by the undersigned, thereunto duly authorized, in the City
    of Hillsboro, State of Oregon, on December
  23
  ,
    2003.
  RADISYS CORPORATION 401(k) SAVINGS PLAN
  By:
  /s/ Julia
        A. Harper
  Julia A. Harper,
  Administrative Committee Member
  EXHIBIT
    INDEX
  Exhibit
  Number
  Description
  23
  Consent of PricewaterhouseCoopers
        LLP
  24
  Powers of Attorney