Strange disk controller in my new 8/A

Hi, I recently received my new PDP-8/A that I bought on eBay. The good news is that it arrived in useable condition, and comes with a 10Mb disk drive (Shugart 4004) and high-speed paper tape reader. The bad news seems to be that the software is all specific to the machine's former life as a CNC machine controller (MM180). The configuration seems to start with a standard 8/E cpu with EAE in the 8/A chassis with 32K of memory and the usual option cards. But for the disk and tape (which were the exciting parts, for me), there is a 3-card set with a 6800 on it that controls the disk, the paper tape reader, the CNC servos, and a bunch of other stuff. Effectively, all the non-console I/O is given over to the 6800 as a kind of I/O processor. Anyone have any experience with these? The 6800 board is KT (Kearney & Trecker) 1-20410, the board with the PIO chips is KT 1-20411, and the disk interface board is KT 1-20666. Thanks, Vince