11/34a help #3

Thanks first to all who have offered help and advice. (Re: sacrifices... roosters have psitticosis and mites, and as for virgins... c'mon guys, I'm in *California*.... <g>) The computer works; the disk drives don't. Armed with the printsets for the drive and the controller, and assisted by the Group, I am reasonably certain that thr RK05 itself is in good shape. I have simulated all it's 'ready' conditions and it's fine. I have changed (twice... aarrghhh) the interface cable... all same. The RK05 thinks that DCLO is asserted. "Forcing' DCLO at the drive makes it work. I have measured DCLO and ACLO at the RK11D backplane.. they are at +5V. In the drive, +30VAC is good into the control card. On the RK11D, I have traced DCLO to the wirewrap pins, and it appears good. I have yet to figure out the path DCLO takes thru the RK11 stack. This problem has been most baffling so far because DCLO originates in the RK05 and in the RK11 and in the BA-11.. so it's a multiple-varible with a commaon symptom. I seem to be converging on it, but if anything jumps out at someone with some actual field experience with these devices... it might save me a few more hours of discovering all the various places where the problem "isn't". ;} To Tony Duell: thanks for the e-mail.. I did indeed verify the itms you mentioned... the 'interlock' circuits are working, microswitches good, etc. ALSO: I would love to have a pointer to the D11W SLU/LTC card switch settings... at least the baud rate stuff... I want to use my LA120 as a console rather than the VT100... getting Unix going is next after the drives a working, and I want hard copy for that. I have looked and not found this particular info on the Net so far. Cheers to all John