xylogics smd interface for pdp11

Would someone please provide docs or setup info for the following scantily-marked unibus SMD controller: Xylogics #300-101-600 rev B L6 doc. pkg. no. 300-101-902 Rev G serial no. 1103 A few hand-written and typed labels are still attached to the socketed chips (presumably geometry/emulation codes): [handles forward, components up, edge connector facing you] along the left side, column of 8 big chips. 4th down: " 766/BU4 " 6th down: " 768/BU4 " six inches in from left; four inches down from handles, by itself : " -173E " slightly right of center; starting three inches down; column of four chips : " 242D " : " 245C " : " 244C " : " 243C " just below those, group of six chips, most missing their labels but top right is still there and reads : "799HC " That's all I can glean. Seems to show up as DM: under rt, but I don't know what size/shape of drive it expects or what partitioning it's willing to perform... BTW, Thanks John if you're lurking here somewhere... TIA jake