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The Namco System 12 is an arcade system board released by Namco in late 1996. In hardware, it is an upgrade from Sony's PlayStation-based System 11, the MIPS R3000A microprocessor is 50% faster, and the C76 sound processor is replaced by the H8/3002. Like the System 11, the System 12 used surface-mounted ROM chips, meaning the boards were unique to each game.〔(System 12 Hardware (Namco) ), HARDWARE DESCRIPTION, System 16〕 ==System 12 specifications== *Main CPU: MIPS R3000A 32-bit RISC processor, @ 50,8032 MHz, Operating performance - 45 MIPS, Instruction Cache - 4 KiB *BUS: 132 MB/s. *OS ROM: 512 kibibytes *Sound CPU: Hitachi H8/3002 @ 16.73735 MHz *Additional Sound Chip: Namco C352 sample playback *Main RAM: 2 megabytes *Video VRAM: 2 megabytes *Sound RAM: 512 kilobytes *Graphical Processor: 360,000 polygons/s, sprite/BG drawing, Adjustable framebuffer, No line restriction, 4,000 8x8 pixel sprites with individual scaling and rotation, Simultaneous backgrounds (parallax scrolling) *Sprite Effects: Rotation, Scaling up/down, Warping, Transparency, Fading, Priority, Vertical and horizontal line scroll *Resolution: 256x224 - 640x480 *Colours: 16.7 million colors, Unlimited CLUTs (Color Look-Up Tables) *Other Features: custom geometry engine, custom polygon engine, MJPEG decoder 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 12」の詳細全文を読む スポンサード リンク
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