I just got my hands on a Tulip System 1 early 8086 computer and I would like to hook it up to a monitor but I am not sure which video signal it outputs. There is a DB9 connector at the back of it, so I guess it might by CGA or MDA. But before trying I would like to be sure. And mainly because, I found an article which tells that pin 3 & 4 output a composite signal which is not really in the CGA nor MDA specs.

Thanks for your help,