On 24 May 2016 4:45 pm, "Ethan Dicks" wrote:
>
> On Tue, May 24, 2016 at 11:36 AM, william degnan
wrote:
> > On Tue, May 24, 2016 at 11:17 AM, j...@cimmeri.com wrote:
> >> B, what was the issue with the core, that you fixed it so fast?
> >
> > I guessed that the G114 was bad based on a hunch.
>
On Tue, May 24, 2016 at 11:36 AM, william degnan wrote:
> On Tue, May 24, 2016 at 11:17 AM, j...@cimmeri.com wrote:
>> B, what was the issue with the core, that you fixed it so fast?
>
> I guessed that the G114 was bad based on a hunch.
>
> I had a spare.
Q. How do you know the guy on the side o
On Tue, May 24, 2016 at 11:17 AM, j...@cimmeri.com wrote:
>
>
> On 5/24/2016 8:37 AM, william degnan wrote:
>
>> ... I fixed the core problem I described in my email. ... Bill
>>
>
> B, what was the issue with the core, that you fixed it so fast?
>
> - J.
>
I guessed that the G114 was bad based
On 5/24/2016 8:37 AM, william degnan wrote:
... I fixed the core problem I
described in my email. ... Bill
B, what was the issue with the core,
that you fixed it so fast?
- J.
The DD11C was modified a while back. I also need to probe the system to
confirm what slots need a NPG grant card, make sure everything is
documented. I *think* it's slot 4 and 2 that need them, but I should
verify this vs. the manual default.
>
>
>
> What never was clear to me was if you actually could access the serial card
> or not from the console. I.e. did it respond when addressing it? If it did
> respond I would check that there were correct power supplied to the 1488
> driver.
>
> /Mattis
>
>
>
The M9312 does yes have the termin
2016-05-24 15:37 GMT+02:00 william degnan :
> >
> >
> >
> >
> > But the M9312 has bus terminating resistors (unless you actually
> desoldered
> > those!). Then you have three terminators in your system! One in the M891
> at
> > the CPU, one in the M9312 in slot 3 of last DD11, and then a M930 in
>
>
>
>
>
> But the M9312 has bus terminating resistors (unless you actually desoldered
> those!). Then you have three terminators in your system! One in the M891 at
> the CPU, one in the M9312 in slot 3 of last DD11, and then a M930 in slot 4
> of DD11.
>
> If you want the M9312 you should put it wi
2016-05-24 14:50 GMT+02:00 william degnan :
> There have been a lot of parallel discussions on my PDP 11/40, I am
> consolidating them all here:
>
> I now have 5 backplanes installed. Here they are, described in order. I
> walked through this will Paul Anderson last night (thanks Paul!) to verif
There have been a lot of parallel discussions on my PDP 11/40, I am
consolidating them all here:
I now have 5 backplanes installed. Here they are, described in order. I
walked through this will Paul Anderson last night (thanks Paul!) to verify
everything was in the right place and in the right o
> From: Bill Degnan
> I removed the core backplanes and returned the DD11-C to the orig
> config next to the CPU. I re-inserted cards as-was. I am not getting
> comms from the M7856.
Ugh. Not good. Does it respond on the UNIBUS? (I.e. if you try to read
the registers from the fron
> From: Bill Degnan
> Card slot 2 of the backplane was "de-jumpered" and requires a NPR card.
> The RL02 needs to be in a slot that would otherwise need an NPR card, as I
> understand things.
Correct. (Although technically it's an RL11 controller card, the RL02 is the
drive; but
>
> >
> >
> >
> http://vintagecomputer.net/digital/pdp11-40/card-layout_moved-plane_Pic2.JPG
> > (I removed the grant cards from the core planes per Tony's suggestion.)
>
>
>
> You don't have a terminator in the last slot of the bus. There should be a
> M930/M9301/M9312 installed there, not a RL11.
>
>
> I have no idea what "3011-cf" is. Isn't it just a a DD11-C backplane with
> power-wring entering from the back, rather than through small circuit
> boards?
>
>
> >
> > UNIBUS 10 A-B (LEFT SIDE OF UNIBUS)
> > M7856 10 F-C (RS232 WITH 19.2 OPTION?)
> > G7273 11 C-D
> > 7891 12 A-F (64k MEMORY)
2016-05-23 15:38 GMT+02:00 william degnan :
> >
> >
> >
> > > So I decided to insert two 32K core memory backplanes
> >
> > 32KW, those would be MM11-U backplanes, right?
> >
>
> Here is a closeup. I have have related docs.
>
> http://vintagecomputer.net/digital/pdp11-40/32Kx16-MemoryBackplan
>
>
>
> > So I decided to insert two 32K core memory backplanes
>
> 32KW, those would be MM11-U backplanes, right?
>
Here is a closeup. I have have related docs.
http://vintagecomputer.net/digital/pdp11-40/32Kx16-MemoryBackplane_5010344C_label.jpg
>
> > My plan is to replace the solid-s
2016-05-23 1:07 GMT+02:00 william degnan :
> Paul,
> What terminator card exactly? As I had written originally, the system was
> functional before I added the core planes. I was thinking that I needed a
> terminator now that I have more than just the cpu plus four slot plane, but
> I did not hav
The M9312 can be setup to also act as a UNIBUS terminator card, and can reside
in the
A-B position of the last UNIBUS backplane slot (ie, the 'UNIBUS out' slot).
Some of the jumpers on the card need to be configured to allow this, the M9312
technical manual gives the exact jumper configuration n
The M9312 can be setup to also act as a UNIBUS terminator card, and can reside
in the
A-B position of the last UNIBUS backplane slot (ie, the 'UNIBUS out' slot).
Some of the jumpers on the card need to be configured to allow this, the M9312
technical manual gives the exact jumper configuration n
Paul,
What terminator card exactly? As I had written originally, the system was
functional before I added the core planes. I was thinking that I needed a
terminator now that I have more than just the cpu plus four slot plane, but
I did not have the space for it along with all of the cards I alrea
An M930 terminator in the far left slot in A/B, where you have the RL11
(M7762). I don't remember if the G7273 is a unibus or q-bus grant card. I
always use the G727 , I think, the little 2 inch by 2 inch or so.
Try front panel funstions with the RL11 out. You'll probably have to move
it to slot
> From: Bill Degnan
> So I decided to insert two 32K core memory backplanes
32KW, those would be MM11-U backplanes, right?
> My plan is to replace the solid-state RAM card with core, and this will
> free up a slot on the 4-slot backplane for a terminator.
Terminators all only go
On May 22, 2016 1:22 PM, "Mark Darvill" wrote:
>
> The core memory/CPU backplane is a special case and doesn’t need grant
cards.
>
> If you have linked up to the expansion Unibus then you need to check you
have the NPG jumper in row C, Pins A1 and B1 in each slot. If these do not
have wire wrap th
Hi William,
If I follow right, you have gotten some great advice,,but I'm not sure
about a few things.
Is your 4 slot SPC a DD11-A, DD11-B, or DD11-CK/CF? The standard one used
in most 1140s is the DD11-B, and a lot had DD11-Cs added later. The DD11-B
will not work with the RL11 and probably no
The core memory/CPU backplane is a special case and doesn’t need grant cards.
If you have linked up to the expansion Unibus then you need to check you have
the NPG jumper in row C, Pins A1 and B1 in each slot. If these do not have wire
wrap then you will either need to wire wrap them or insert a
> Are you saying remove all of the GC cards, just leave the slots blank?
Yes, from the slots that are designed to take the core memory or its
controllers (I assume, given you have special backplanes, there are
boards with the core planes on, and more boards with the XY drivers
or the sense/inhib
On Sun, May 22, 2016 at 1:10 PM, tony duell wrote:
>
> > Are you saying remove all of the GC cards, just leave the slots blank?
>
> Yes, from the slots that are designed to take the core memory or its
> controllers (I assume, given you have special backplanes, there are
> boards with the core pla
On Sun, May 22, 2016 at 12:33 PM, tony duell
wrote:
> Strictly the core backplanes are not Unibus backplanes. They have Unibus In
> and Out connectors, but the slots are wired for the core memory board,
> not Unibus boards (like SPCs -- Small Peripheral Controllers -- which is
> what
> you serial
Strictly the core backplanes are not Unibus backplanes. They have Unibus In
and Out connectors, but the slots are wired for the core memory board,
not Unibus boards (like SPCs -- Small Peripheral Controllers -- which is what
you serial port is).
> Basic Question #1
> Do I need grant cards in *ever
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