NCR mini tower looking for info ???

Hi, I have a couple of these and need some information. These are NCR mini tower servers with a 68000 cpu. Has a Qic type Cartridge tape and comm board with 8 TTY ports (all 15 pin) and 2 CPU ports (1 DB9 and 1 DB15). I believe that the system boots to the CPU port on the back and then goes to the tty00 port after it loads the OS. I can see what it is doing on the CPU port up to the drive test. It works the drive for a short time and then stops displaying anything. The manuals don't say anything about the console port or pin outs. I would guess they expect the system to be install by someone other than the end user. The system freezes on self test when it starts to read the hard drive Or it has switched over to the comm board and TTYxx ports. I would guess that the drive needs to be formatted and the OS reloaded. So does anyone have a boot tape and/or the serial pin outs both 9 and 15 pin for one of these. Thanks, Jerry g-wright at att.net