OK, I've been looking into the B400X chassis, it looks to me like it is straight Q-Bus, however, the DSSI disks look to be a problem. It looks like a male HD50 connector is what connects to them. However, the KA640 CPU has 50-pin connector next to the one for the RAM, I'm guessing this is the DSSI connector. Is this correct? If so, then I'm needing to go from 50-pin ribbon to HD50, I don't suppose I'd be able to use a SCSI cable I've got that would do the trick. I've no idea what the DSSI pinout is, or how much I'd risk blowing something up. Maybe I should just turn the chassis into a PDP-11 w/SCSI disks :^) Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |