Consider yourself lucky -- when I hit this issue about this time last year (maybe it's seasonal?) I got excoriated off-list by a particularly irate listmember for not having the foresight to just try reversing the cable before asking on the list... :)
- Josh On Tue, Mar 29, 2016 at 6:13 AM, Camiel Vanderhoeven <[email protected]> wrote: > It's done on purpose, sort of an initiation rite. All traces of this > conversation will be wiped out so future /34 owners won't miss out on this! > ;-) > > Camiel. > > -----Original Message----- > From: cctalk [mailto:[email protected]] On Behalf Of Jörg > Hoppe > Sent: dinsdag 29 maart 2016 13:28 > To: General Discussion: On-Topic and Off-Topic Posts < > [email protected]> > Subject: Re: PDP-11/04-34 Programmer's Console manual error > > Noel, > > this is something every '34 owner must go through. Welcome to the club ;-) > > Joerg > > Am 29.03.2016 um 13:19 schrieb Noel Chiappa: > > So, something I just found out the hard way, while debugging another > > 'situation' with a PDP-11/04: > > > > The KY11-LB Programmer's Console maintainence manual contains a major > > error, in describing the configuration of the 20-conductor flat cable > > that connectors the front panel and the UNIBUS interface module > > (M7859). This is covered in Chapter 9, "Installation", which includes two > figures, Figures 9-4 and 9-5. > > > > Those figures show the 20-conductor flat cable with the red edge > > stripe toward the outer edge of the front panel PCB (correct), and > > also toward the outer edge of the M7859 (WRONG). On the M7859, the red > > stripe edge needs to be oriented _away_ from the outer edge of the board. > > > > If it is plugged in as shown in these figures, the machine will not > operate: > > the four 'RUN/SR DISP/BUS ERR/MAINT' lights will be on, but nothing > > else, and it will not respond to any keys. Fortunately, plugging the > > cable in reversed does not damage anything; simply reverse the cable. > > > > Noel > > > >
