On Thu, Jul 5, 2018 at 4:43 PM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
> I'll
add the info to the MSV11-J page on the CHWiki, once I have it.
Alas, it's down at the moment ... but once
it's back, I'll get them
right up.
It's back, and I've added the chip info for the low 1MB bank:
http://gunkies.org/wiki/MSV11-J_QBUS_memory#Technical_information
I'll do the other bank 'soon' (I first have to tweak my 'scope loop
program,
to turn on memory mapping, to get to the high bank). Here's my test rig, BTW:
http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/MSV11JTester.jpg
Simple, but it did the job!
Noel
I don't see any chip info update at that #Technical_information page.
It currently says "This page was last modified on 26 December 2016, at
19:13"
What signal were you probing on the M8186 KDF11-A board?
If you run the XXDP VMJAB0 diagnostic and there are failures, does it
tell you which data bit and/or ECC bit positions have failures? I
suppose it must, otherwise there wouldn't have been much point in the
bit mapping exercise.