Cool tnx. Lyle - I’ll be there on Sat. I’ll bring the emulator if I get all the parts by then. Looking forward to it.
Kirk > On Aug 2, 2016, at 11:00 PM, couryho...@aol.com wrote: > > yea these are nasty sounding drives when they load! ---Ed# > > Re: You'll hear a serious "clunk" when they load. > > In a message dated 8/2/2016 10:49:06 P.M. US Mountain Standard Time, > lbick...@bickleywest.com writes: > On Tue, 02 Aug 2016 21:43:03 -0700 > Kirk Davis <kirkbda...@me.com> wrote: > > > Thanks for the suggestions. I’m in Sunnyvale, CA. > > > > I actually got the rx02 from another hobbyist that > > used it with the 44 in 2008 so I suspect it is configured correctly. > > The other drive doesn’t have a belt so I’m unable to test with it. > > I’ve verified the cable direction. It’s a sweet 44 - super clean, > > runs great and is like a tank. > > > > One of the problems is I don’t know normal behavior of the drive. The > > motor is aways spinning for unit 0. When I try booting I don’t hear > > the heads load or seek. I’m new to the 44 monitor commands & boot > > process etc so I’m learning as I go. > > The motors always spin. The heads should engage whenever selected. > You;ll hear a serious "clunk" when they load. > > If you're coming to the VCF this coming weekend, Bob Rosenblum and I > will have a running RX02 attached to a PDP-8/M. You can hear all of > it's "sounds" there. You'll also be able to play "Spacewar!" with our > VC8/E and XY monitor, etc. > > BTW: Make sure you have the correct switch settings on the RX02 > mainboard for your PDP-11... > > > I’m also making one of these to help isolate if it’s a > > drive/cable/controller problem: > > > > http://www.torok.info/computing/pdp11/rx02/index.htm > > That looks like a cool project. Would like to see it when you've got it > running!!! > > Lyle > > > > On Aug 2, 2016, at 3:24 PM, Paul Anderson <used...@gmail.com> wrote: > > > > > > Hi KIrk, > > > > > > The H771 is a rock solid power supply. I never saw one go bad while > > > in field service, but they are getting old. Checking the output > > > voltage and ripple is not a bad idea. > > > > > > forgive me for asking, but where are you located? The RX02 had 4 > > > different power hanesses for i20, 220, 50 hz and 60 hz. Also > > > different belts amd pulleys. if any of this is wrong you cn see > > > weird problems. A lot of RX02s and replacement drives were soul > > > through brokers who never asked or were never told where the unit > > > was going. if you aren'y useing 120/60 that would be my first > > > thought. > > > > > > Is the problem the same when booting off either drive? Also check > > > the switches and the resistors on the head cables. > > > > > > Good luck, Paul > > > > > Jerry Weiss wrote: > > > > > >If you haven’t already, check the cable seating, orientation and for > > >bent pins. > > > On the RX211 board J1 - TT is the location of the AC LO - Active > > > Low signal. > > > > > > On Tue, Aug 2, 2016 at 4:06 PM, Kirk Davis <kirkbda...@me.com> > > > wrote: > > >> I’m a noob using RX02’s but thought I’d run this past people that > > >> may have debugged them in the past and see if they agree with what > > >> I’m finding: > > >> > > >> I’m trying to get a RX02 + RX211 + 11/44 going. The RX02 appears > > >> to power up OK (fan and motor spinning). I verified I have the DY > > >> boot rom in the 44. Attempt booting from the console: > > >> > > >>>>> b dy > > >> > > >> S > > >> 17777707 173436 > > >> > > >> Which halts in the DY boot rom. I look at the base RX211 register: > > >> > > >>>>> e 17777170 > > >> 17777170 104040 > > >> > > >> From the manual this like the controller is present but the high > > >> order bit is set indicating an error > > >> > > >> Looking at the status register; > > >> > > >>>>> e 17777172 > > >> 17777172 000010 > > >> > > >> Bit 3 == RX AC LO - This bit is set by the interface to indicate a > > >> power failure in the RX02 sub- system. > > >> > > >> So start looking at the RX02 power supply? > > >> > > >> > > >> > > > > > > -- > 73 AF6WS > Bickley Consulting West Inc. > http://bickleywest.com > > "Black holes are where God is dividing by zero"
