RT-11 / RX-01 issues ... "almost" boots ...

I am restoring a PDP-11/34 and am currently adding an RX-01 drive to it in order to boot RT-11. I have already located a copy of RT-11 on an LSI-11 system and have made a bootable RX-01 floppy (an M7946 was installed on the LSI-11 to do this). This disk was tested on the LSI-11 system by asserting BHALT, entering a bootstrap via ODT, and booting from the disk (which was, at the time, the only device): it boots properly and runs RT-11 version 5.04SJ as expected. An M7846 RX-11 controller was installed in SPC slot 9 of the 11/34, the bootstrap loaded at 1000 via the front panel (and verified), and a boot attempted. When STARTed at 1000, the RUN light comes on, the RX-01 head engages (as evident from the solenoid), and you can hear the heads advancing a track or two then it stops: the "SR DISP" led and the RUN led go out, and the display reads "005134". Examining the bootstrap area (1000) shows the bootstrap was replaced by data. Does anyone know what the "005134" code means? I search through RT-11 docs and can't find anything on error codes or such and I'm hoping this will help with the debugging. Thanks! Professor Mark Csele, P.Eng. Niagara College, Canada 300 Woodlawn Rd., L-23 Welland, ON, L3C 7L3 (905) 735-2211 x.7629 E-Mail: mcsele at niagarac.on.ca URL: http://technology.niagarac.on.ca/people/mcsele Author of "Fundamentals of Light Sources and Lasers", Wiley, 2004