Qbus card I.D & info needed.

Hi All, Going through some stuff picked up at the auction a while ago (but never completely looked through) I found some interesting Qbus stuff. I need some help with the ID though, Googling has turned up nothing useful. 1. Qbus half-height, appears to be a memory board: CDM 7703 R Circa 1980 Cyberchron Corporation 2.Qbus half-height, appears to be a disk controller card: Data System Design Circa 1980 s/n 0777 #804120-01 rev A I also found along with two Phillips RD50 cdroms, a M7552 Qbus KRP50 controller and cab kit, but no external cables. Both the RD50's and the cabkit have db15 connectors, so I'm presuming a straight through db15 might do the trick, or are there any special cables required? (were talking DEC here, so I would't be surprised if it needed a special cable) Ant help would be appreciated. Cheers Tom