Re: DEC weights
> On May 23, 2021, at 9:14 PM, Marc Howard via cctech > wrote: > In my case I'm looking for the weight of an RK05 and full height 19" DEC > rack. I have not see these published, but can attest that it is somewhere between 1 25-yr-old-can-load-in-station-wagon and 1 53-yr-old-can-load-in-station-wagon...
Re: RK11-D "diskless" test ZRKJE0???
> On Jul 9, 2020, at 5:02 PM, Robert Armstrong via cctech > wrote: > I have an 11/04 with an RK11-D. I have a couple of RK05s, but I wanted to > test the controller before I start working on the drives. The PDP11 > Diagnostic Handbook says that ZRKJ?? "checks only the drive-independent logic > of the RK11 controller. no drive is needed..." I assumed that meant it was a > diskless test, but now I'm not sure that's true. Can anyone confirm or deny > this? Hi Robert, My experience with an RK11-C on a PDP-11/45 is that the drive-independent diagnostic does in fact work with no drives attached. For the RK11-C at least, it does clever things with maintenance-mode to simulate signaling that would source from the drive where necessary. I know there are some differences between the RK11-C and the RK11-D -- if some of these are related to maintenance mode, it could also be that you need to verify that the version of the diagnostic you are running is RK11-D (and not just RK11-C) aware? Another possibility is that you should pull the BC11 and add another terminator rather than leaving it dangling? --FritzM.
Re: PDP-11/40 available, Arizona
On 5/10/19 6:42 PM, Adam Thornton via cctech wrote: I have been invited out to the site tomorrow morning to take an inventory of what’s there (I live near the machines). I imagine that I may well have a lot of photos that I bring to the list and say “what is this?” Standing by to help out! Go get it, Adam -- (come on, you can _make_ room! :-))
Re: advice / suggestion wanted PDP 11/40 only boots XXDP, not RT11
> On Jan 31, 2019, at 12:26 PM, Bill Degnan via cctech > wrote: > > My PDP 11/40 suddenly lost it's ability to boot RL02 disks except the XXDP > disk. I have two drives, both boot up an XXDP (I have more than one) just > fine, but any formerly-working RT-11 (v 5, 5.1, 5.3) no longer boots, it > just hangs. I'd check things related to interrupts. My experience has been that XXDP monitors (at least the earlier ones) use polling, and can be boot and run even when disk controller interrupts aren't working because of this. --FritzM.
Re: VT52 keyboard question
> On Mon, Mar 13, 2017 at 4:45 PM, Marc Howard via cctech < > cctech@classiccmp.org> wrote: > >> Hi, >> >> The "2" key on my VT52 is very hard to use. You've gotta pound it and you >> might get 2 "2"s for your trouble. I've a similar key on my VT52 -- will be diving in there sometime soon to check it out, but it might take me a little while to get to it... Will follow-up here when I do with whatever I find out. --FritzM.
