Difference between revisions of "Sega G80"

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The '''Sega G80''' is an [[arcade]] system produced by [[Sega]] in 1981. It can be considered a successor to the [[Sega VIC Dual]] system, and was Sega's arcade platform of choice before the release of the [[Sega System 1]].
 
The '''Sega G80''' is an [[arcade]] system produced by [[Sega]] in 1981. It can be considered a successor to the [[Sega VIC Dual]] system, and was Sega's arcade platform of choice before the release of the [[Sega System 1]].
  
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The G80 was designed to be a more versatile system than those seen in arcade cabinets of the past. Rather than rely on bespoke cabinet designs for each game, Sega opted for a more cost-effective "Convert-a-Game" system (as it was marketed in the US), in which games housed on CPU boards could be easily swapped by arcade operators. It also marks Sega's recognition of the likes of [[Atari]]'s ''[[Asteroids]]'' and ''Lunar Lander'', as two variants of the G80 system exist - one which displays raster graphics, and another that displays vector graphics.
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The G80 was designed to be a more versatile system than those seen in arcade cabinets of the past. Rather than rely on bespoke cabinet designs for each game, Sega opted for a more cost-effective "Convert-a-Game" system (as it was marketed in the US), in which games housed on CPU boards could be easily swapped by arcade operators. It also marks Sega's recognition of the likes of [[Atari]]'s ''[[Asteroids]]'' and ''Lunar Lander'', as two variants of the G80 system exist - one which displays raster graphics, and another that displays color vector graphics.
  
 
The G80 gets its name from its CPU - a modified [[Z80]] processor (which is attached to each game).  The G80 is largely identical to the Z80, however the "ld (address),a" instruction (opcode 32h) was modified to mangle the address written to — an early form of copy protection. The mangling system is [https://github.com/mamedev/mame/blob/master/src/mame/machine/segag80.c rather complicated, and differs from game to game].
 
The G80 gets its name from its CPU - a modified [[Z80]] processor (which is attached to each game).  The G80 is largely identical to the Z80, however the "ld (address),a" instruction (opcode 32h) was modified to mangle the address written to — an early form of copy protection. The mangling system is [https://github.com/mamedev/mame/blob/master/src/mame/machine/segag80.c rather complicated, and differs from game to game].
  
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The raster version of the Sega G80 board is not fondly remembered in the history of video games, however the platform did provide a basis for many reasonably successful vector-based games from the company, some of which, such as ''[[Space Fury]]'', ''[[Tac/Scan]]'' and perhaps most famously, ''[[Star Trek: Strategic Operations Simulator]]'', saw home console/computer ports.
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While the raster version of the Sega G80 board is not as fondly remembered in the history of video games, the platform provided a basis for many reasonably successful vector-based games from the company, some of which, such as ''[[Space Fury]]'', ''[[Tac/Scan]]'', and, perhaps most famously, ''[[Star Trek: Strategic Operations Simulator]]'', saw home console/computer ports.
  
 
==Technical Specifications==
 
==Technical Specifications==

Revision as of 02:41, 9 October 2015

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Sega G80
Manufacturer: Sega
Release Date RRP Code

The Sega G80 is an arcade system produced by Sega in 1981. It can be considered a successor to the Sega VIC Dual system, and was Sega's arcade platform of choice before the release of the Sega System 1.

The G80 was designed to be a more versatile system than those seen in arcade cabinets of the past. Rather than rely on bespoke cabinet designs for each game, Sega opted for a more cost-effective "Convert-a-Game" system (as it was marketed in the US), in which games housed on CPU boards could be easily swapped by arcade operators. It also marks Sega's recognition of the likes of Atari's Asteroids and Lunar Lander, as two variants of the G80 system exist - one which displays raster graphics, and another that displays color vector graphics.

The G80 gets its name from its CPU - a modified Z80 processor (which is attached to each game). The G80 is largely identical to the Z80, however the "ld (address),a" instruction (opcode 32h) was modified to mangle the address written to — an early form of copy protection. The mangling system is rather complicated, and differs from game to game.

While the raster version of the Sega G80 board is not as fondly remembered in the history of video games, the platform provided a basis for many reasonably successful vector-based games from the company, some of which, such as Space Fury, Tac/Scan, and, perhaps most famously, Star Trek: Strategic Operations Simulator, saw home console/computer ports.

Technical Specifications

List of Games

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