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. The System 18 is primarily a soup-ed System 16, offering superior sound, more tile laters and extra graphics options. | 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. | + | 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== | ==Technical Specifications== | ||
| − | * Main CPU: | + | *Board composition: Main board + [[ROM]] board |
| − | * Sound CPU: | + | *Main CPU: [[Motorola 68000]] @ 10 MHz (16-bit & 32-bit instructions @ 1.75 [[wikipedia:Instructions per second|MIPS]]) |
| − | * Sound chip: | + | *Sound CPU: [[Zilog Z80]] @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS) |
| − | * | + | *[[wikipedia:Sound chip|Sound chips]]: |
| − | * | + | **2× Yamaha YM3438 @ 8 MHz |
| − | * | + | **Ricoh RF5c68 @ 10 MHz (8-channel PCM chip, remarked as Sega Custom 315) |
| − | * 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 | + | *Graphics chips: |
| + | **[[Sega System 16B]] chipset | ||
| + | **Yamaha YM7101 [[VDP]] ([[Sega Mega Drive]] VDP) | ||
| + | *Display resolution: 320×224 | ||
| + | *Color palette: 98,304 (16-bit) | ||
| + | **Sega's 16-bit arcade 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) | ||
| + | *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 | ||
==Gallery== | ==Gallery== | ||
Revision as of 16:06, 9 September 2015
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| Sega System 18 | |||||
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| Manufacturer: Sega | |||||
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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:
- 2× Yamaha YM3438 @ 8 MHz
- Ricoh RF5c68 @ 10 MHz (8-channel PCM chip, remarked as Sega Custom 315)
- Graphics chips:
- Sega System 16B chipset
- Yamaha YM7101 VDP (Sega Mega Drive VDP)
- Display resolution: 320×224
- Color palette: 98,304 (16-bit)
- Sega's 16-bit arcade 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)
- 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
Gallery
Main PCB
List of Games
- Alien Storm
- Bloxeed (1989 — Japan only; all regions would see it on System C)
- Clutch Hitter
- D. D. Crew
- Desert Breaker
- Laser Ghost
- Michael Jackson's Moonwalker
- Shadow Dancer
- Where's Wally!
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