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:cctalk-boun...@classiccmp.org] On Behalf Of Jörg Hoppe Sent: dinsdag 29 maart 2016 13:28 To: General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org> 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 >
