Difference between revisions of "Sega System 18"
From Sega Retro
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*Sound CPU: [[Zilog Z80]] @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS) | *Sound CPU: [[Zilog Z80]] @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS) | ||
*[[wikipedia:Sound chip|Sound chips]]: | *[[wikipedia:Sound chip|Sound chips]]: | ||
| − | + | :*2× [[Yamaha]] [[YM3438]] @ 8 MHz | |
| − | + | :*[[Ricoh]] [[RF5c68]] @ 10 MHz (8-channel PCM chip, remarked as Sega Custom 315) | |
*Graphics chips: | *Graphics chips: | ||
| − | + | :*[[Sega System 16B]] chipset | |
| − | + | :*[[Yamaha]] [[YM7101]] [[VDP]] ([[Sega Mega Drive]] VDP) | |
*Display resolution: 320×224 | *Display resolution: 320×224 | ||
*[[Palette|Color palette]]: 98,304 (16-bit) | *[[Palette|Color palette]]: 98,304 (16-bit) | ||
| − | + | :*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){{ref|https://github.com/mamedev/mame/tree/master/src/mame/drivers/segas18.cpp}} | *Colors on screen: 4096 (unique colors) to 8384 (with shadow & highlight){{ref|https://github.com/mamedev/mame/tree/master/src/mame/drivers/segas18.cpp}} | ||
*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 | *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 | ||
Revision as of 19:45, 17 October 2018
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| Sega System 18 | |||||||||
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| Manufacturer: Sega | |||||||||
| Variants: System 16, System C, Mega-Tech System, Mega Play, Mega Drive | |||||||||
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The Sega System 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 laters 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
- Board composition: Main board + ROM board
- Main CPU: Motorola 68000 @ 10 MHz (16-bit & 32-bit instructions @ 1.75 MIPS)
- Sound CPU: Zilog Z80 @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS)
- Sound chips:
- Graphics chips:
- Sega System 16B chipset
- Yamaha YM7101 VDP (Sega Mega Drive VDP)
- Display resolution: 320×224
- Color palette: 98,304 (16-bit)
- 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
- Bloxeed (1989 — Japan only; all regions would see it on System C)
- Shadow Dancer (1989)
- Alien Storm (1990)
- Michael Jackson's Moonwalker (1990)
- Clutch Hitter (1991)
- D. D. Crew (1991)
- Laser Ghost (1991)
- Desert Breaker (1992)
- Where's Wally! (1992)
Photo gallery
Main PCB
References
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| Originating in arcades |
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