Namco System 12

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.^[1]

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