Here is some good info on the 800-200. http://www.ifamilysoftware.com/PDF/800-200manual.pdf
The only info I could find from other forums on the 800-100 was that they were not satisfied with it. Said MSD 6AL was better. Everyone were extremely satisfied with the 800-200 because of all the bells and whistles. I wonder why Holley quit making ignition boxes, MSD came along making them less expensive?