Thanks to several folks who offered suggestions and/or were willing to try to duplicate my setup to see if they could find a solution. I did manage to get this to work. I used the RK8ESY driver. This is the configuration I ended up with: .R BUILD $PRINT RK05: *RKA0 *RKB0 *RKA1 *RKB1 RKA2 RKB2 RKA3 RKB3 RX01: *RXA0 *RXA1 KL8E: *TTY LPSV: *LPT TC : *DTA0 *DTA1 DTA2 DTA3 DTA4 DTA5 DTA6 DTA7 RK8E: *SYS RKA0 RKB0 which means I had to delete the TC08 driver. I tripped a bit over zeroing the device, but finally got that right. Also, I can't find anything in the manual about how files are supposed to get from the distribution media to the system disk, so I just used COPY and hoped it would work. (So far so good.) Obviously my notes weren't good enough. Shoot me now. My next problem is that FORTRAN IV programs hang when executed. De