Namco System 1

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The Namco System 1 arcade system board was first used by Namco in April 1987 and was a major enhancement to the previous Namco System 86 arcade system board. Due to its release date, it was originally called Namco System 87 according to the Namco Museum series.

Yokai Douchuuki was the first game to use this board. The game's name translated to English as "Supernatural Creature Traveller's Journal" and was later renamed "Shadowland" for anglophone territories. Two months later, they released Dragon Spirit, which was one of the most difficult vertical scrolling shooters ever seen for its release date. This was followed by Blazer in July, which was one of the first games to use an isometric perspective, Quester in September, which was similar to Arkanoid but the only difference was that it had better graphics, Pac-Mania in November, and Galaga '88 in December. Towards the end of the year, Namco developed a 16-bit arcade system board - the more powerful 68000-based Namco System 2 system board.

Namco System 1 specifications

Processors:

  • Main CPU: Motorola 6809 @ 1.536 MHz
  • Sub CPU: Motorola 6809 @ 1.536 MHz
  • Sound CPU: Motorola 6809 @ 1.536 MHz
  • MCU: Hitachi HD63701 @ 1.536 MHz

Video:

  • Video resolution 288×224 (horizontal) or 224×288 (vertical)
  • Variable-sized display window
  • 24-bit RGB system palette
  • 3 scrolling 512×512 tilemap layers (64×64 characters)
  • 1 scrolling 512×256 tilemap layer (64×32 characters)
  • 2 fixed 288×224 tilemap layers (36×28 characters)
  • 127 variable-sized sprites (up to 32×32) displayed at once
  • 8 sets of 256-color palettes (chosen from the 24-bit RGB master palette) for the playfields
  • 8 sets of 256-color palettes for "playfield shadow and highlight effects"
  • 127 sets of 16-color palettes for the sprites (one palette per sprite)

Making a maximum total of 6128 simultaneously displayed colors from the 16-million color master palette, or a more realistic maximum of 4966 in typical use (15 plus transparent for each sprite, 256 for a background playfield, and 255 plus transparent for each of 5x playfields and 6x shadow/highlight overlays) - still a very impressive result when the home computer state of the art for moving images without programming tricks was 64 colours (32 main + 32 "shadows") from 4096 (12-bit RGB) on the Commodore-Amiga, and the hardware's entire display field was less than 65,000 pixels.

Sound:

  • Yamaha YM2151 FM sound chip
  • Custom 8-channel wavetable stereo PSG
  • 2-channel DAC

List of Namco System 1 arcade games

External links

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