PDP-11/23 Debugging

[Ben Sinclair]

Thanks! I did not have a jumper on W4, so I added one, then set E21 switch
5 to "on."

I've been messing with a few things today, and it seems like the system
kind of works. I can boot the TU58 images I have from AK6DN's archive. He
has a "home grown" diagnostics image, and they all seem to run fine, though
I'm not sure exactly what they're testing. I ran the plain XXDP image and
was able to run xteko. From the 11/23 XXDP images I can run the MMU test,
which does pass after pass with no errors.

The test I can't run, and think I should be able to run before I try to do
anything else, is the JKDBDO CPU test. When I try to run this one it
doesn't print anything and drops me to ODT at 037526.

I believe it should print a "JKDBDO DCFlI AA CPU DIAGNOSTIC" banner when it
starts, but it doesn't seem to get that far.

Also, and I should have mentioned this before, from the time I got this
system the LEDs on the BDV11 are always all on. I know green and one of the
reds should be on to indicate proper power, but I believe the rest should
be off if the system is running normally. However, I'm not sure I
understand how those lights are controlled. The BDV11 manual says they are
controlled through a register via software, so maybe I'm just not running
anything that sets them. The only boot rom I have on the BDV11 is a TU58
boot loader, so if it's up to some other boot rom to set that LED register,
maybe mine just doesn't do it.

Thanks!

On Mon, Nov 17, 2014 at 10:56 AM, Glen Slick <glen.slick at gmail.com> wrote:

> On Mon, Nov 17, 2014 at 8:14 AM, Ben Sinclair <bensinc at gmail.com> wrote:
> > Since I do have a BDV11, am I correct in that I should just leave the aux
> > switch alone and continue debugging elsewhere?
> >
>
> Do you have jumper W4 installed or removed on your M8186? If you are
> using a BDV11 with the M8186 system then I believe you would normally
> have jumper W4 installed on the M8186.
>
> Then on the BDV11 you would set the E21 Switch 5 to the On/Closed
> position so that the LTC function is software controlled by Bit 6 of
> the resister at 177546.
>
> EK-KDF11-UG-PR2_Mar79.pdf
> Page 2-2, 2.2.2 Event Line - W4
>
> EK-BDV11-TM-001_Mar78.pdf
> Page 3-3,Table 3-1, BEVNT L Switch
> Page 4-22, Figure 4-11, BEVNT Logic
>
> -Glen
>



-- 
Ben Sinclair
ben at bensinclair.com