> On 12/8/2017 3:50 PM, Jerry Weiss wrote: >> On Dec 8, 2017, at 2:25 PM, John Welch via cctech <[email protected]> >> wrote: >> >>> I am reviving an 11/34. Cards are: >>> >>> Back/Fans [M8266--------] Front of machine where keypad is. >>> [M8265--------] >>> [M9312] [M7859] >>> [M7762--------] >>> [OPEN] [M7860] >>> [M7840--------] >>> Bus grant in third from front slot >>> [M9302] [M7856] >>> The 7856 is hooked to a cable/null modem (i think)/PC running >>> XP&Hyperterminal >>> >>> When I first powered on the programmers console said '7' and I powered off, >>> then back on, and now it says '5' >>> >>> Any suggestions as to what to try first? I may have the bus grant in >>> backwards. I have other boards I can try. >>> >>> Sincerely, >>> John Welch >>> :qw >>> >> >> 1) The G727A bus grant card is keyed (somewhat). It should be in Row D >> (fourth from the back) >> It won’t seat evenly if reversed. At least that is what my scraped >> knuckles remember. >> >> You can temporarily pull it out to finish the check out. There’s >> nothing past the >> M7840 that requires DMA.
Ignore this last suggestion (see below). >> >> 2) Check the baud rate, stop bits and parity settings on both the >> Hyperterminal and the M785 to make sure they match. >> >> 3) Are you seeing a single 7 or 5 on KY11-LB Programmer Console or on the >> Hyperterminal? >> >> An other status led’s lit on the KY11-LB? >> >> 4) I don’t see any memory listed… Do you have any M7847’s? >> >> 5) Grab a copy of EK-11034-UG-001 PDP-11-34 System User’s Manual for more >> info. >> >> >> Jerry >> >> > > > On Dec 8, 2017, at 5:26 PM, John Welch via cctech <[email protected]> > wrote: > > Update: > This is the map of the machine: > > ........................ AAA BBB CCC DDD EEE FFF .................... > (Rear/Fans/Power Supply) 1 [M8266----------------] (Front/Keypad/DC ON) > ........................ 2 [M8265----------------] .................... > ........................ 3 [M9312] [M7859--------] .................... > ........................ 4 [M7891----------------] .................... > ........................ 5 [M7762----------------] .................... > ........................ 6 [M7860--------] .................... > ........................ 7 [M7840----------------] .................... > ........................ 8 GNT .................... > ........................ 9 [M9302] [M7856--------] .................... > ........................ AAA BBB CCC DDD EEE FFF .................... > Reseating the ribbon cable on the M7859 changed the display. I have replaced > the M7840 with a G7273. > Now when I power on it says (dim)0, (bright)0, blank, (dim)0, blank, blank. > I have reseated the M7859, I don't think I have another one. > Maybe I should hit it with a vacuum. > I had forgotten about needing to cut a wire for DMA. Can you give me a > refresher on how to tell which slots are cut? I remember having to turn the > chassis over and looking for a particular wire but that was >15 years ago. Your update has a M7891 (MS11) which addresses the memory questions. The Programmers Console display is not correct. It should be 7 digits, either 0000000 when running or some other data or address value. Check the cable orientation. see http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/1134/KY11-LB_MaintMan.pdf <http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/1134/KY11-LB_MaintMan.pdf> chapter 9. A light cleaning and reseating all the boards is an easy place to start. For NPG changes see http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/1134/1134_UsersManual.pdf <http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/1134/1134_UsersManual.pdf> section 4.2.2.2 Ignore my earlier comment about leaving out the G727a. I had slipped into QBUS thinking mode in error. > On Dec 8, 2017, at 5:49 PM, John Welch <[email protected]> wrote: > > I also have an 11/04 that I went and drug out. It is configured like this: > > 11/04: > ........................ AAA BBB CCC DDD EEE FFF .................... > (Rear/Fans/Power Supply) 1 [M7263----------------] (Front/Keypad/DC ON) > ........................ 2 [M7847----------------] .................... > ........................ 3 [M7859--------] .................... > ........................ 4 [M7847----------------] .................... > ........................ 5 GNT .................... > ........................ 6 [M7762----------------] .................... > ........................ 7 [M7840----------------] .................... > ........................ 8 [DILOG--------] .................... > ........................ 9 {nothing} .................... > ........................ AAA BBB CCC DDD EEE FFF .................... > I am thinking I could put a M9203/M7856 into slot 9, and find a M9312 for > slot 3 and maybe this would fire up. Any suggestions? The 11/04 and 11/34a are of the same engineering cycle, so share these parts. See http://www.pdp-11.nl/pdp11-34a/cpu/options/bootstrap-info.html <http://www.pdp-11.nl/pdp11-34a/cpu/options/bootstrap-info.html> and http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/EK-11004-OP-001%20PDP-11-04%20System%20User%27s%20Manual.pdf <http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/EK-11004-OP-001%20PDP-11-04%20System%20User's%20Manual.pdf> I believe the cabling for the M7859 is a little different between the two See Section A in the 11/04 Manual. Jerry
