KDJ11-E issue/info

Noel Chiappa jnc at mercury.lcs.mit.edu
Sun Jul 7 09:31:56 CDT 2019

    > From: Nigel Johnson 
    > Anybody have any docs on the DEC LSI 11/93 (KDJ11-E)?

Info on the -E is thin on the ground. The User's Manual (EK-KDJ1E-UG-001)
is available online, though, which is a start - it gives info on how to
configure it, etc.

    > I am trying to run it in a BA23 backplane and seemingly geting bus
    > hangs as is there is something that it is looking for that is not
    > there!

QBUS 11's are pretty resistant to hangs, unless you have an interrupted
grant chain. A simple missing device should give a NXM fault.

I"d try getting the whole system working with another CPU, and then plug in
the -E; reduce the number of unknown variables. Although with memory and
console line on-board on the -E, it shouldn't need too much else for at least
basic functioning.


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