Looking for info on memory

[Noel Chiappa]

    > 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