Syntech/Chroma Cult Schematics & Source CodeBy Ken Ypparila 
Version 1 Schematic
This is the original that uses an EPROM.
Version 2 Schematic
Used for later production runs, without an EPROM.
Written a long time ago on the Apple II; the file is long gone. The following hex file is burned right into the micro for the last batch so you don't really need an EPROM anymore.