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...Step 1.0 and Step 1.5 released in 1996, Step 2.0 in 1997, and Step 2.1 in 1998. ...rarest of them. By 2000, the Sega Model 2 & 3 had sold over 200,000 arcade systems worldwide.

{{Infobox System|Logo=Logo-naomi.png|Image=Sega-300px-Naomi_case.jpg|Year=1998|Manufacturer=SEGA|Type=Arcade|CPU=Hitachi SH-4 @ 200 MH|GPU=NEC-VideoLogic ...ccessor to the Sega Model 3. Sega first demonstrated NAOMI publicly at the 1998 Amusement Machine Show (an annual trade show hosted in Tokyo by the Japan A

...MAME source code and extended it to include support for consoles, computer systems and calculators. That is not to say the scope was limited to only these 3 c ...oftware defined machine configurations, states etc, it may define multiple systems and/or machines