Difference between revisions of "Sega System 18"

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The '''Sega System 18''' is an arcade system board released by [[Sega]] in 1989. System 18 had a very short run of games but most boards on this hardware were JAMMA standard. Most of these games also have the "suicide battery" as associated with Sega's [[System 16]] hardware.
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{{ConsoleBob
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| logos=
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| consoleimage=System18 mainPCB.jpg
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| imgwidth=320
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| name=
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| maker=[[Sega Enterprises, Ltd.]]
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| variants=[[System 16]], [[System C]], [[Mega-Tech System]], [[Mega Play]], [[Mega Drive]]
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| releases={{releasesArcade
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| system_date_world=1989
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}}
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}}
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The '''Sega System 18''' (セガ システム 18) is an arcade system board released by [[Sega]] in 1989. The System 18 is primarily a soup-ed System 16, offering superior sound, more tile layers and extra graphics options.
  
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==Specifications==
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System 18 boards had a very short run of games but most adhere to JAMMA standard, unlike previous systems. Most of these games also have the "suicide battery" as associated with Sega's [[System 16]] hardware. It also contains the [[VDP]] used by the [[Sega Mega Drive]] console.
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* Main CPU: Motorola [[68000]] @ 10 MHz
 
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* Sound CPU: Zilog [[Z80]] @ 8 MHz
 
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* Sound chip: 2 x Yamaha [[YM3438]] @ 8 MHz + Ricoh RF5c68 @ 10 MHz (8 Channel PCM chip, remarked as Sega Custom 315)
 
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* Display [[resolution]]: 320 x 224
 
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* Colors: 4096
 
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* Board composition: Main board + ROM board
 
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* Graphical capabilities: 128 [[sprite]]s on screen at one time, 4 tile layers, 1 text layer, 1 sprite layer with hardware sprite zooming, translucent shadows
 
  
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==List of Games==
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==Technical specifications==
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* ''[[Alien Storm]]''
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*Board composition: Main board + [[ROM]] board
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* ''[[Bloxeed]]''
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*Main CPU: [[Motorola 68000]] @ 10 MHz (16-bit & 32-bit instructions @ 1.75 [[wikipedia:Instructions per second|MIPS]])
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* ''[[Clutch Hitter]]''
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*Sound CPU: [[Zilog Z80]] @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS)
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* ''[[D. D. Crew]]''
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*[[wikipedia:Sound chip|Sound chips]]:
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* ''[[Desert Breaker]]''
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:*2× [[Yamaha]] [[YM3438]] @ 8 MHz
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* ''[[Laser Ghost]]''
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:*[[Ricoh]] [[RF5c68]] @ 10 MHz (8-channel PCM chip, remarked as Sega Custom 315)
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* ''[[Michael Jackson's Moonwalker]]''
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*Graphics chips:
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* ''[[Shadow Dancer]]''
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:*[[Sega System 16B]] chipset
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* ''[[Where's Wally!]]''
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:*[[Yamaha]] [[YM7101]] [[VDP]] ([[Sega Mega Drive]] VDP)
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*Display resolution: 320×224
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*[[Palette|Color palette]]: 98,304 (16-bit)
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:*16-bit color palette: 15-bit RGB high color depth (32,768 colors) and 1-bit shadow & highlight that triples up to 98,304 colors
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*Colors on screen: 4096 (unique colors) to 8384 (with shadow & highlight){{ref|https://github.com/mamedev/mame/tree/master/src/mame/drivers/segas18.cpp}}
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*Graphical capabilities: 128 [[sprite]]s on screen at one time, 4 [[Tile Layer|tile layers]], 1 text layer, 1 sprite layer with hardware sprite zooming, translucent shadows, sprites of any height and length, row & column scrolling
  
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[[Category:Sega System Series]]
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==List of games==
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{{CargoReleaseList
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| table=releases
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| query=console="sys18"
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| orderby=date
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}}
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*''[[Hammer Away]]'' (1991; cancelled)
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*''[[Clockwork Aquario|Tokeijikake no Aquario]]'' (1992; cancelled)
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==Photo gallery==
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<gallery>
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System18 mainPCB.jpg|Main PCB
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</gallery>
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==References==
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<references/>
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{{Sega Arcade Boards}}
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[[Category:Sega System series]]

Latest revision as of 08:03, 16 November 2024

System18 mainPCB.jpg
Sega System 18
Manufacturer: Sega Enterprises, Ltd.
Variants: System 16, System C, Mega-Tech System, Mega Play, Mega Drive
Release Date RRP Code
Arcade
World		 ? ?




































The Sega System 18 (セガ システム 18) is an arcade system board released by Sega in 1989. The System 18 is primarily a soup-ed System 16, offering superior sound, more tile layers and extra graphics options.

System 18 boards had a very short run of games but most adhere to JAMMA standard, unlike previous systems. Most of these games also have the "suicide battery" as associated with Sega's System 16 hardware. It also contains the VDP used by the Sega Mega Drive console.

Technical specifications

  • Graphics chips:
  • 16-bit color palette: 15-bit RGB high color depth (32,768 colors) and 1-bit shadow & highlight that triples up to 98,304 colors
  • Colors on screen: 4096 (unique colors) to 8384 (with shadow & highlight)[1]
  • Graphical capabilities: 128 sprites on screen at one time, 4 tile layers, 1 text layer, 1 sprite layer with hardware sprite zooming, translucent shadows, sprites of any height and length, row & column scrolling

List of games

Photo gallery

  • Main PCB

References

  1. ↑ https://github.com/mamedev/mame/tree/master/src/mame/drivers/segas18.cpp


Sega arcade boards
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