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 console and three Sega game cartridges, wired a decompiler into the console circuitry, and generated printouts of the resulting source code. Accolade engineers studied and annotated the printouts in order to identify areas of commonality among the three game programs. They then loaded the disassembled code back into a computer, and experimented to discover the interface specifications for the Genesis console by modifying the programs and studying the results. At the end of the reverse engineering process, Accolade created a development manual that incorporated the information it had discovered about the requirements for a Genesis-compatible game. According to the Accolade employees who created the manual, the manual contained only functional descriptions of the interface requirements and did not include any of Sega’s code.

In the second stage, Accolade created its own games for the Genesis. According to Accolade, at this stage it did not copy Sega’s programs, but relied only on the information concerning interface specifications for the Genesis that was contained in its development manual. Accolade maintains that with the exception of the interface specifications, none of the code in its own games is derived in any way from its examination of Sega’s code. In 1990, Accolade released “Ishido”, a game which it had originally developed and released for use with the Macintosh and IBM personal computer systems, for use with the Genesis console.

Even before Accolade began to reverse engineer Sega’s games, Sega had grown concerned about the rise of software and hardware piracy in Taiwan and other Southeast Asian countries to which it exported its products. Taiwan is not a signatory to the Berne Convention and does not recognize foreign copyrights. Taiwan does allow prosecution of trademark counterfeiters. However, the counterfeiters had discovered how to modify Sega’s game programs to blank out the screen display of Sega’s trademark before repackaging and reselling the games as their own. Accordingly, Sega began to explore methods of protecting its trademark rights in the Genesis and Genesis-compatible games. While the development of its own trademark security system (TMSS) was pending, Sega licensed a patented TMSS for use with the Genesis home entertainment system.

The most recent version of the Genesis console; the “Genesis III”, incorporates the licensed TMSS. When a game cartridge is inserted, the microprocessor contained in the Genesis III searches the game program for four bytes of data consisting of the letters “S-E-G-A” (the “TMSS initialization code”). If the Genesis III finds the TMSS initialization code in the right location, the game is rendered compatible and will operate on the console. In such case, the TMSS initialization code then prompts a visual display for approximately three seconds which reads: “PRODUCED BY OR UNDER LICENSE FROM SEGA ENTERPRISES LTD” (the “Sega Message”). All of Sega’s game cartridges, including those disassembled by Accolade, contain the TMSS initialization code.

Accolade learned of the impending release of the Genesis III in the United States in January, 1991, when the Genesis III was displayed at a consumer electronics show. When a demonstration at the consumer electronics show revealed that Accolade’s “Ishido” game cartridges would not operate on the Genesis III, Accolade returned to the drawing board. During the reverse engineering process, Accolade engineers had discovered a small segment of code—the TMSS initialization code—that was included in the “power-up” sequence of every Sega game, but that had no identifiable function. The games would operate on the original Genesis console even if the code segment was removed. Mike