As filed with the Securities and Exchange Commission on August 20, 1999 Registration No. 333-85093 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 --------------- Post-Effective Amendment No. 1 to 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 (IRS Employer of incorporation or organization) Identification No.) 5445 NE Dawson Creek Drive Hillsboro, Oregon 97124 (Address of Principal (Zip Code) Executive Offices) --------------- RadiSys Corporation 1995 Stock Incentive Plan, as amended Texas Micro Inc. 1986 Incentive Stock Option Plan Texas Micro Inc. 1986 Supplemental Stock Option Plan Texas Micro Inc. 1996 Long-Term Incentive Plan, as amended Texas Micro Inc. 1990 Outside Directors' Stock Option Plan Texas Micro Inc. 1995 Outside Directors' Stock Option Plan, as amended (Full title of plans) --------------- Glenford J. Myers President and Chief Executive Officer RadiSys Corporation 5445 NE Dawson Creek Drive Hillsboro, OR 97124 (Name and address of agent for service) Telephone number, including area code, of agent for service: (503) 615-1100 Copy to: Todd A. Bauman Stoel Rives LLP 900 SW Fifth Avenue, Suite 2600 Portland, Oregon 97204-1268 CALCULATION OF REGISTRATION FEE - -------------------------------------------------------------------------------------- Proposed Proposed Maximum Maximum Amount Offering Aggregate Amount of Title of Securities to Be Price Per Offering Registration to Be Registered Registered(1) Share(1) Price(1) Fee - ------------------- -------------- ---------- ----------- ------------ Common Stock 726,598 Shares $30.553433 $22,200,064 $6,172(2) - -------------------------------------------------------------------------------------- (1) This Registration Statement registers the following shares: Name of Plan Number of Shares ------------ ---------------- RadiSys Corporation 1995 Stock Incentive Plan, as amended 500,000 Texas Micro Inc. 1986 Incentive Stock Option Plan 57,461 Texas Micro Inc. 1986 Supplemental Stock Option Plan 9,670 Texas Micro Inc. 1996 Long-Term Incentive Plan, as amended 129,047 Texas Micro Inc. 1990 Outside Directors' Stock Option Plan 13,296 Texas Micro Inc. 1995 Outside Directors' Stock Option Plan, as amended 17,124 TOTAL 726,598 The proposed maximum offering price per share and the proposed maximum aggregate offering price were estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h) under the Securities Act of 1933. The estimated offering prices for the shares to be issued under the Texas Micro Inc. plans were calculated based on the exercise prices of outstanding options granted under such plans as follows: Exercise Price Aggregate Number (based on a Exercise Plan of Shares weighted average) Price ---- --------- ---------------- ----------- 1986 Incentive Stock Option Plan 57,461 $ 17.85 $ 1,025,597 1986 Supplemental Stock Option Plan 9,670 $ 12.86 $ 124,357 1996 Long-Term Incentive Plan 129,047 $ 13.61 $ 1,756,330 1990 Outside Directors' Stock Option Plan 13,296 $ 27.31 $ 363,114 1995 Outside Directors' Stock Option Plan, as amended 17,124 $ 21.50 $ 368,166 Pursuant to Rule 457(c), the estimated offering price for the shares to be issued under the RadiSys Corporation 1995 Stock Incentive Plan was calculated based on the average of the high and low prices of the Common Stock on August 11, 1999 as reported in The Wall Street Journal for Nasdaq National Market issues. (2) The full amount of the filing fee was paid with the initial filing. Post-Effective Amendment No. 1 ------------------------------ This Post-Effective Amendment No. 1 to Form S-8 Registration Statement (File No. 333-85093) amends technical errors to the original filing by adding references to the Texas Micro Inc. 1986 Supplemental Stock Option Plan to the cover page and the "Calculation of Registration Fee" table and making corresponding changes to the "Calculation of Registration Fee" table. The number of shares of RadiSys common stock registered under this Registration Statement remains unchanged. 2 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 post-effective amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Hillsboro, State of Oregon, on August 19, 1999. RADISYS CORPORATION By STEPHEN F. LOUGHLIN -------------------------------------- Stephen F. Loughlin, Vice President of Finance and Administration and Chief Financial Officer Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities indicated on August 19, 1999. Signature Title --------- ----- GLENFORD J. MYERS* - ---------------------------------- Chairman of the Board, President, Glenford J. Myers and Chief Executive Officer (Principal Executive Officer) - ---------------------------------- Vice President of Finance and Stephen F. Loughlin Administration and Chief Financial Officer (Principal Financial and Accounting Officer) WILLIAM W. LATTIN* - ---------------------------------- Director William W. Lattin 3 JAMES F. DALTON* - ---------------------------------- Director James F. Dalton RICHARD J. FAUBERT* - ---------------------------------- Director Richard J. Faubert C. SCOTT GIBSON* - ---------------------------------- Director C. Scott Gibson JEAN-PIERRE D. PATKAY* - ---------------------------------- Director Jean-Pierre D. Patkay - ---------------------------------- Director Jean-Claude Peterschmitt *By STEPHEN F. LOUGHLIN ---------------------------------- Stephen F. Loughlin, Attorney-in-Fact 4