PDP-11/23 Debugging

[Ben Sinclair]

Just for fun I moved all of the jumpers from my old M8186 to the new M8186.
It works just the same... It still fails that CPU test.

I wish I had the microfiche for this CPU, as the one for the KDF-11B lists
the hardware requirements!



On Tue, Nov 18, 2014 at 9:39 PM, Ben Sinclair <bensinc at gmail.com> wrote:

> I found the microfiche for the KDF-11B on Bitsavers, but they're missing
> the one for the KDF-11A unfortunately!
>
> On Tue, Nov 18, 2014 at 9:21 PM, Ben Sinclair <bensinc at gmail.com> wrote:
>
>>
>>
>> On Tue, Nov 18, 2014 at 5:24 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
>> wrote:
>>
>>>
>>> So, if the CPU checks OK, maybe the DLV11-J has a problem with
>>> interrupts? Is
>>> there a DL11 diag you can run on it? (If not, I can whip up a simple
>>> test to
>>> check it out.)
>>>
>>
>> The diagnostics manual mentions this:
>>
>> NDLAA0.BIN DLVll-J (M8043 & FALCON) LOGIC TEST
>>
>> But, the only XXDP disks I have are the ones from AK6DN, and that test
>> doesn't appear to be on any of them.
>>
>>
>>
>>>
>>>     > I have another memory board, but I know it's bad, so I can't try
>>> that!
>>>
>>> Probably the one you have passes the memory diag, though, right?
>>>
>>
>> I've run a memory test program I found that's not part of XXDP, and I
>> believe it's fine, but is there a test in XXDP I could run? I don't see
>> anything in the XXDP manual related to an M8044/MSV11. Now that I think
>> about it, I probably should find a way to really verify the memory is
>> working!
>>
>> The MMU test from XXPP does pass, but I'm not sure if that also tests the
>> memory.
>>
>>
>>> If it's not an issue with the DL11 interrupting, it sounds like we may
>>> have
>>> to dig into that diag to find out what it thinks it's doing when it
>>> blows up.
>>> If I can get my tool-chain working (currently downloading the abs-loader
>>> isn't working right somehow), I'll see if I can figure out how to load
>>> it,
>>> and DDT along with it, and poke into it.
>>>
>>> Locating the fiche would be another way to go...
>>>
>>>         Noel
>>>
>>
>>
>>
>>
>>
>> --
>> Ben Sinclair
>> ben at bensinclair.com
>>
>
>
>
> --
> Ben Sinclair
> ben at bensinclair.com
>



-- 
Ben Sinclair
ben at bensinclair.com