Fwd: Re: Revive 11/34

[John Welch]

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.
On 12/8/2017 3:17 PM, Henk Gooijen wrote:
 >
 >
 >
 >
 >
 > Van: John Welch via cctech
 > Verzonden: vrijdag 8 december 2017 21:25
 > Aan: cctech at classiccmp.org
 > Onderwerp: Revive 11/34
 >
 >
 >
 > 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
 >
 >
 >
 >
 >
 > It is not completely clear (to me) how the modules are installed in the
 >
 > backplane. Standing in front of the 11/34 processor box (looking at the
 >
 > console), slot number 1 is at the right side. Each slot has 6 positions.
 >
 > Position A is at the rear side, followed by B thru F. Position F is
 >
 > thus at the front side.
 >
 > There is no confusion about the first 4 slots.
 >
 >
 >
 > Slot 1 and 2 hold the 11/34A processor boards, with M8266 in slot 1,
 >
 > and M8265 in slot 2.
 >
 > Slot 3, positions A and B has the M9312 bootstrap/terminator board,
 >
 > and slot3, positions C thru F has the M7859 KY11-LB programmer's console
 >
 > interface board.
 >
 > Slot 4 holds the RL11 interface. This module does "DMA", so the NPR
 >
 > jumper must be cut (open) on the backplane.
 >
 > Slot 5 has an SPC in positions C thru F. I had to look it up; it is the
 >
 > DR11-C.
 >
 >
 >
 > We are up to slot 6. Now things get "interesting" ... is that M7840 a 
typo?
 >
 > The field guide says that this is a KE11-B Extended Arithmetic Element.
 >
 > I do not know that board, is it "hex" or "quad"?
 >
 > Not sure that board belongs there ... and if it is quad, I assume it has
 >
 > to be in positions C thru F. I would suggest to pull this module, and
 >
 > check the NPR wire presence on the backplane. You need a G727A or G7273
 >
 > in this slot when the M7840 is removed.
 >
 >
 >
 > If you are not skipping slots (see below), we are now at slot 7. There
 >
 > is probably a G727A grant continuity card (aka "knockle buster") in
 >
 > position D. That would be OK, but if the NPR jumper is cut on the
 >
 > backplane, you would need a G7273 continuity and NPR card in positions
 >
 > C - D. It is easy to have the G727 put in wrong. The 4 copper "jumper"
 >
 > traces should be facing the next higher-numbered slot.
 >
 >
 >
 > Then you say that the next slot has the M9202 (in position A - B) and
 >
 > the M7856 (SLU and RTC) in positions C thru F.
 > The M9202 connects two system units (backplanes). So, what is the next
 >
 > backplane?  Or do you have the M9202 in slot 8 and slot 9, positions
 >
 > A - B?  I have never seen that ...
 >
 >
 >
 > I am missing one slot. The 11/34 backplane has 9 slots.
 >
 >
 >
 > When you power up the system, the display should show 6 octal numbers.
 >
 > If only one digit shows a number (7 or 5 or whatever), there is an
 >
 > issue with the console itself, or the M7859. The 6 digits of the display
 >
 > are multiplexed. Maybe the connection cable between the console and the
 >
 > M7859 - damaged/knicked? It is worth checking out the simpler things 
first.
 >
 >
 >
 > Henk.

-- 
Sincerely,
John Welch
281-353-4706 Home
713-725-7017 Cell
:qw