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The Namco NB-1 is a 32-bit arcade system board which was first used by Namco in 1993; NB-2 has a different memory map, more complex sprite and tile banking, and two additional ROZ layers over the NB-1. Great Sluggers: New World Stadium was the first game to use this board - and the following year, Nebulas Ray, Great Sluggers '94, J-League Soccer V-Shoot, Point Blank (original name Gun Bullet), The Outfoxies and Mach Breakers: Numan Athletics 2 were released on it. In 1995, the eighth title for Namco's long-running World Stadium series was released, Super World Stadium '95 (which borrowed heavily from that original Great Sluggers); in the two following years, it was followed up by Super World Stadium '96 and Super World Stadium '97, the second of which was the last game to use it.

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Namco NB-1/NB-2 specificationsEdit

  • Main CPU: Motorola 68EC020 32-bit processor @ 12.5 MHz (for the NB-1 games), 24.192 MHz (for the NB-2 games)
  • Secondary CPUs: Namco C329 with C137
  • Custom graphics chips: Namco C123, C145, C156 and C116 (for the graphic effects) with Namco C355, C187 and C347 (for the motion objects)
  • Sound CPU: Namco C351 (utilized for the NB-1 games), Namco C75 (Motorola M37702-based 16-bit) @ 16.128 MHz (utilized for the NB-2 games)
  • PCM sound chip: C352 @ 16.384 MHz that supports 8-bit linear and 8-bit muLaw PCM with four-channel output
  • Control chip: Namco C160
  • Board composition: two boards (NB-1) or single board (NB-2); an additional "gun" interface board was also utilized for Point Blank. [1]

Namco NB-1 PCBEdit

NB-1 MAIN PCB NB-1 MAIN(B) PCB NB-1 MEMEXT OBJ2 PCB NB-1 MEMEXT OBJ8 PCB

List of Namco NB-1 arcade gamesEdit

List of Namco NB-2 arcade gamesEdit

ReferencesEdit