On 2014-05-22 05:15, Cory Smelosky wrote: Everything I know about the Qbus tells me my bus shouldn't be contiguous...but... Processor Type: 11/23-PLUS Memory Size: 512. Kw Options: Extended Instruction Set (EIS) Extended (22-Bit) Addressing Parity Memory Name Vector CSR Unit Type Remark DUA 154 172150 0 RA82 1 RA82 2 RA82 3 RA82 MUB 330 160404 YLA 060 177560 YLB 300 176500 YLC 310 176510 YLD 320 176520 It's in a BA123 so I currently have a MicroPDPVAX 11/23 II FYI: PDP-11s were also sold in BA123 configurations... But nice. So now the system is running as it should. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol