Looking for info on memory

[Nigel Johnson Ham]

I feel such an idiot! I had minicom set for hardware flow control on the
PC that was connected as the console :-)

I'm sure I remember that as a symptom of no bank 0 memory!

Years ago it would have been the first thing I checked, well maybe not,
I would have had a real VT100 to connect to it. I am getting old!

Now I start adding modules, thanks for all who made suggestions!

cheers,

Nigel


On 2021-10-23 4:47 p.m., Noel Chiappa wrote:
>     > From: Nigel Johnson Ham
>
>     > an 11/23 will not work without bank zero memory
>
> It depends on what you mean by 'work'. If you mean 'ODT does not operate
> correctly', or 'the CPU won't run', I can assure you that neither of those
> is correct.
>
> Here is a recorded log from a session earlier today on a system here next to
> my desktop: it contains a KDF11-A (in slot 1Left of a Q-Q backplane)
> and a console DLV11-J (in slot 1Right), and no other cards:
>
>   ^@^@
>   000000
>   @777560/000000
>   @777564/000000
>   777566/000000
>   777570/?
>   @777640/177777 777
>   @/000777
>   @777640G
>   Cmd:
>
>   177640
>   @^@^@
>
> As you can see, ODT is working,and the console registers are all responding
> OK.
>
> The thing at the bottom is that hack of putting a small program in the PARs
> (UIPAR0, in this case). The "Cmd:" prompt is where I told my console program
> to send a 'break' down the serial line to the -11, stopping the CPU. (The
> 'run' light had been on, after the "777640G".)
>
> (Note: The PAR hack doesn't work in J-11 CPUs; they won't do instruction
> fetches from PARs.)
>
> To confirm that I'm not BSing you, can someone else on the list
> please do this on their KDF11-A, and confirm that it produces the results
> I show about? Thanks.
>
>
>     > All I get is output of 173000 and the no ability to input.
>
> If that's with just a non-LSI11 CPU card and the console serial line, the
> machine has a problem. As you can see above (the "777560/", etc were my
> type-in), you should be able to talk to ODT on a KDF11 (and I tried a
> KDJ11 yesterday, it worked too).
>
> (I don't recall if the LSI-11 types _anything_ when started with no working
> memory at 0; if anyone wants to know, I can fairly easily try it, I have a
> bunch of working LDI-11's, both quad and dual cards).
>
> 	Noel