TRS-80 Model 1 and 4 questions

I've picked up a TRS-80 Model 1 with cpu, monitor, expansion interface and 2 80-track and 1 40-track drives. I've put the monitor and cpu together and it runs fine in that mode. As is usual though, I don't have any of the hardware manuals for it and I'm unsure of all the connectors on the expansion interface. There are lots of edge connectors around it. Does anyone know what each of these are? Also, how to connect the cpu to the EI? I know where the ribbon cable connects between the two but are there any othere cables that need to be hooked up? There seem to be several others coming out of the EI. Also, I picked up a TRS-80 Model 4, again with out manuals or software. I have some software for the model 1 but can someone send me LDOS or other OS for the Model 4? Thanks. ----- David Williams - Computer Packrat dlw(a)neosoft.com http://www.neosoft.com/~dlw