Difference between revisions of "Galaxian-based hardware"

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Sega's hardware variants were based on the arcade hardware used by the companies it licensed from, such as [[Konami]], [[Nihon Bussan]], and [[Alpha Denshi]], which all used Galaxian-based hardware at the time. Several modifications were made to the hardware, with ''[[Super Cobra]]'' (and its predecessor ''[[wikipedia:Scramble|Scramble]]'') adding side-scrolling capabilities, and ''[[Jump Bug]]'' adding multi-directional scrolling and parallax scrolling capabilities.
 
Sega's hardware variants were based on the arcade hardware used by the companies it licensed from, such as [[Konami]], [[Nihon Bussan]], and [[Alpha Denshi]], which all used Galaxian-based hardware at the time. Several modifications were made to the hardware, with ''[[Super Cobra]]'' (and its predecessor ''[[wikipedia:Scramble|Scramble]]'') adding side-scrolling capabilities, and ''[[Jump Bug]]'' adding multi-directional scrolling and parallax scrolling capabilities.
  
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==Technical Specifications==
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==Technical specifications==
 
The technical specifications for this hardware include:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp Namco Galaxian (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/galaxian.cpp Namco Galaxian video hardware (MAME)]}}{{ref|1=[http://www.system16.com/hardware.php?id=688 Sega Z80 Based Hardware (System 16)]}}{{ref|1=[http://www.system16.com/hardware.php?id=513 Namco Galaxian Hardware (System 16)]}}
 
The technical specifications for this hardware include:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp Namco Galaxian (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/galaxian.cpp Namco Galaxian video hardware (MAME)]}}{{ref|1=[http://www.system16.com/hardware.php?id=688 Sega Z80 Based Hardware (System 16)]}}{{ref|1=[http://www.system16.com/hardware.php?id=513 Namco Galaxian Hardware (System 16)]}}
  
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* [[wikipedia:Refresh rate|Refresh rate]]: 60.60606 Hz ([[wikipedia:V-sync (video)|V-sync]])
 
* [[wikipedia:Refresh rate|Refresh rate]]: 60.60606 Hz ([[wikipedia:V-sync (video)|V-sync]])
 
* [[wikipedia:Color model|Color model]]: [[wikipedia:RGB color model|RGB]]
 
* [[wikipedia:Color model|Color model]]: [[wikipedia:RGB color model|RGB]]
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** Color [[palette]]: 224 ([[wikipedia:RGB color model|RGB]],{{ref|1=[http://www.arcade-museum.com/game_detail.php?game_id=7885 Galaxian (Arcade Museum)]}} [[wikipedia:Programmable read-only memory|PROM]])
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:* Color [[palette]]: 224 ([[wikipedia:RGB color model|RGB]],{{ref|1=[http://www.arcade-museum.com/game_detail.php?game_id=7885 Galaxian (Arcade Museum)]}} [[wikipedia:Programmable read-only memory|PROM]])
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** Colors on screen: 32 (palette [[RAM]])
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:* Colors on screen: 32 (palette [[RAM]])
 
* Background planes:
 
* Background planes:
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** [[wikipedia:Tile engine|Tilemap]] plane: 8×8 tile sizes, scrolling
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:* [[wikipedia:Tile engine|Tilemap]] plane: 8×8 tile sizes, scrolling
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** [[wikipedia:Bitmap|Bitmap]] plane: Star generator, scrolling
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:* [[wikipedia:Bitmap|Bitmap]] plane: Star generator, scrolling
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* [[Sprite]] plane: Line buffer, 8×8 to 16×16 sizes, 4 colors per sprite, 15 sprites per scanline, 240 [[texel]]s per scanline, sprite flipping, sprite animation{{ref|[http://www.cs.columbia.edu/~%20sedwards/classes/2011/4840/reports/Galaxian.pdf Galaxian CSEE 4840 Embedded System Design (University of Columbia)]}}
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* [[Sprite]] plane: Line buffer, sprite flipping, sprite animation{{ref|[http://www.cs.columbia.edu/~%20sedwards/classes/2011/4840/reports/Galaxian.pdf Galaxian CSEE 4840 Embedded System Design (University of Columbia)]}}
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** Sprites on screen: 57 sprites{{ref|[https://www.youtube.com/watch?v=XhYVcwhSWjI Galaxian MAME Footage (YouTube)]}}
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:* Sprite size: 16×16
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:* Colors per sprite: 4 colors (3 opaque, 1 transparent)
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:* Sprites per scanline: 7 sprites, 112 [[texel]]s
 
}}
 
}}
  
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* Background planes: Multi-directional scrolling, parallax scrolling{{ref|1=[http://books.google.co.uk/books?id=lB4PAwAAQBAJ&pg=PA181 ''Games vs. Hardware. The History of PC video games: The 80's'']}}
 
* Background planes: Multi-directional scrolling, parallax scrolling{{ref|1=[http://books.google.co.uk/books?id=lB4PAwAAQBAJ&pg=PA181 ''Games vs. Hardware. The History of PC video games: The 80's'']}}
  
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==List of Games==
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==List of games==
 
Sega licensed arcade games that ran on this hardware include:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp Namco Galaxian (MAME)]}}
 
Sega licensed arcade games that ran on this hardware include:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp Namco Galaxian (MAME)]}}
  
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* ''[[Moon Cresta]]'' (1980)
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*''[[Moon Cresta]]'' (1980)
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* ''[[Frogger]]'' (1981)
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*''[[Frogger]]'' (1981)
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* ''[[Jump Bug]]'' (1981)
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*''[[Jump Bug]]'' (1981)
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* ''[[Super Cobra]]'' (1981)
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*''[[Super Cobra]]'' (1981)
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* ''[[Turpin]]'' (1981)
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*''[[Turpin]]'' (1981)
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*''[[Serizawa Hachidan no Tsume Shougi]]'' (1982)
  
 
==References==
 
==References==

Latest revision as of 03:42, 12 September 2023

Notavailable.svg
Galaxian-based hardware
Manufacturer: Namco (variants by Sega)
Release Date RRP Code
Arcade
World		 ? ?
Arcade
World		 ? ?





































Galaxian-based hardware was used for several Sega licensed arcade games in the early 1980s, based on Namco's Galaxian arcade hardware, which debuted in 1979.[1]

Sega's hardware variants were based on the arcade hardware used by the companies it licensed from, such as Konami, Nihon Bussan, and Alpha Denshi, which all used Galaxian-based hardware at the time. Several modifications were made to the hardware, with Super Cobra (and its predecessor Scramble) adding side-scrolling capabilities, and Jump Bug adding multi-directional scrolling and parallax scrolling capabilities.

Technical specifications

The technical specifications for this hardware include:[1][2][3][4]

  • Background planes:
  • Tilemap plane: 8×8 tile sizes, scrolling
  • Bitmap plane: Star generator, scrolling
  • Sprite plane: Line buffer, sprite flipping, sprite animation[6]
  • Sprite size: 16×16
  • Colors per sprite: 4 colors (3 opaque, 1 transparent)
  • Sprites per scanline: 7 sprites, 112 texels

Modifications

Super Cobra (and its predecessor Scramble) added the following upgrade to the hardware in early 1981:

  • Background planes: Side-scrolling

Jump Bug made the following modifications to the hardware later in 1981:

  • Sound chip: AY-3-8910 @ 1.78975 MHz
  • Background planes: Multi-directional scrolling, parallax scrolling[7]

List of games

Sega licensed arcade games that ran on this hardware include:[1]

References

  1. ↑ 1.0 1.1 1.2 Namco Galaxian (MAME)
  2. ↑ Namco Galaxian video hardware (MAME)
  3. ↑ Sega Z80 Based Hardware (System 16)
  4. ↑ Namco Galaxian Hardware (System 16)
  5. ↑ Galaxian (Arcade Museum)
  6. ↑ Galaxian CSEE 4840 Embedded System Design (University of Columbia)
  7. ↑ Games vs. Hardware. The History of PC video games: The 80's


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