I have one of those aicent multisync monitors with a bank of dip switched and a atari style toggle switch going from rgb to ttl (its green n fuzzy but...)

I just want to chime in and say be careful blindly hooking up TTL output to analog monitor inputs, most monitors should be protected but ntsc signals are max 0.7v, VGA is max 1v, ttl on the other hand is 5v and can source a decent amount of current, so there is a good chance of frying something