I'm trying to get my RLV11 working to eventually run my RL02, and am having some trouble. I have a PDP-11/23 in an H9273 backplane. I just got it working reliably without the RLV11 boards installed, so now I'm giving them a try again. Here's my configuration: Down the left side: M8186, M8044, M8044, M8043, M8013, M8014, and M8012 (the BDV11) on the bottom. I don't have the drive connected and am just trying to run the VRLAC0 controller test, which I believe should work without any drives connected. The switches on M8014 are configured to the defaults, according to: http://bitsavers.trailing-edge.com/pdf/dec/qbus/EK-RLV11-TD-001_RLV11_Contr… That would be a vector address of 330 and a base address of 174400. Unfortunately, VRLAC0 doesn't look like it can see anything, but I'm not sure I'm reading its output correctly. What follows is the VRLAC0 output. I also looked at 17440 myself and get 005737, though I'm not sure what it should be. This is new territory for me, so any help would be welcome. Thanks! .R VRLAC0 VRLAC0.BIN DRSSM-G2 CVRLA-C-0 CVRLAC RLV11 RL01 DSKLESS DIAGNOSTIC UNIT IS RLV11 RSTRT ADR 145702 DR>START CHANGE HW (L) ? Y # UNITS (D) ? 1 UNIT 0 11/23 PROCESSOR (L) Y ? BUS ADDRESS (O) 174400 ? VECTOR (O) 160 ? 330 DRIVE (O) 0 ? BR LEVEL (O) 5 ? CHANGE SW (L) ? Y DROP ON ERROR LIMIT (L) N ? AUTOSIZE (L) N ? CVRLA SYS FTL ERR 00000 ON UNIT 00 TST 001 SUB 000 PC: 017066 CAN NOT ADDRESS RLCS CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00001 ON UNIT 00 TST 002 SUB 000 PC: 017164 CAN NOT ADDRESS RLBA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00002 ON UNIT 00 TST 003 SUB 000 PC: 017262 CAN NOT ADDRESS RLDA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00003 ON UNIT 00 TST 004 SUB 000 PC: 017360 CAN NOT ADDRESS RLMP CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00100 ON UNIT 00 TST 005 SUB 000 PC: 017454 CAN NOT ADDRESS RLCS CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00101 ON UNIT 00 TST 006 SUB 000 PC: 017550 CAN NOT ADDRESS RLBA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00102 ON UNIT 00 TST 007 SUB 000 PC: 017644 CAN NOT ADDRESS RLDA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00103 ON UNIT 00 TST 008 SUB 000 PC: 017740 CAN NOT ADDRESS RLMP CONTROLLER: 174400 DRIVE: 0 ILL INTER 004 PC 017770 PS 000341 ILL INTER 004 PC 014460 PS 000005 DR> -- Ben Sinclair ben at bensinclair.com