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The Namco System 21 "Polygonizer" is an arcade system board unveiled by Namco in 1988 with the game ''Winning Run''. It was the first arcade board specifically designed for 3D polygon processing. The hardware went through significant evolution throughout its lifespan until the last game, ''Cyber Sled'', was released in 1993. It was preceded by the Namco System 2 in 1987 and succeeded by the Namco System 22 in 1993. ==System 21 specifications== The System 21 consists of four PCBs housed in a metal crate. *Main CPU: 2x Motorola 68000 @ 12.288 MHz *DSP (used for performing 3D math): 4x Texas Instruments TMS320C25 @ 24.576 MHz (Star Blade uses 5xTMS320C20 instead) *Sound CPU: Motorola 6809 @ 3.072 MHz *Sound Chip: Yamaha YM2151 @ 3.58 MHz *MCU Hitachi HD63705 @ 2.048 MHz * + Namco custom chips 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Namco System 21」の詳細全文を読む スポンサード リンク
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