Micropolis 1015-2 floppy drive

Interesting. I was given a Futuredata development system some years ago. It's 2 units, one looks like a terminal (CRT and built-in keyboard), but has the processor, EPROM programmer, etc PCBs in a card cage at the back, the other is the disk unit (2 8" drives). I have a schematics book for it (about the only manual I do have), but I think it only covers the 'main' unit. I don't think I have any info on the disk controller board in the disk drive unit (and from what I remember when I looked inside, it's not simple, there was certainly a processor (Z80?) in there). Does any docuemtnation for the Multi-Tech GCR board exist? It might be a help in figuring out the Futuredata one (not that I am going to look at that for a _long_ time...) -tony