Overview

Refer to SegaRetro and System16 for a general hardware overview and list of games.

System Pictures

Documentation

Code	Document	Author	Description	Source
	System 18 Schematics (Partial)	Sega	A single page from the official schematics from Sega. Unfortunately only the last page (page 11) has been located, which contains the connector pinouts. The schematics are clean and very easy to read.	Original document
	System 18 Schematics (Jotego)	Jotego	Reverse engineered schematics done by Jotego. As this was done prior to the discovery of the page above of the official schematics, line names won’t match. May contain errors or incomplete information, but a great reference in absense of official schematics.	GitHub
420-0010U	Shadow Dancer Installation and Owner’s Manual	Sega	Installation and owner’s manual for Shadow Dancer, with wiring diagram and dipswitch settings.
420-5954-01	Laser Ghost Owner’s Manual	Sega	Installation and owner’s manual for Laser Ghost, with wiring diagram and dipswitch settings.
999-0017	Alien Storm Owner’s Manual	Sega	Owner’s manual for Alien Storm, with wiring diagram and dipswitch settings.
999-0038	Moonwalker Owner’s Manual	Sega	Owner’s manual for Moonwalker, with wiring diagram and dipswitch settings.
999-0079	Clutch Hitter Owner’s Manual	Sega	Installation and owner’s manual for Clutch Hitter, with wiring diagram and dipswitch settings.
999-0090	DD Crew Owner’s Manual	Sega	Installation and owner’s manual for DD Crew, with wiring diagram and dipswitch settings.

High Resolution Photos

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Miscellaneous Photos

Here’s a collection of images of this system that have been posted online from various sources: Hardware Photos