XXDP+ 2.5

From: CLASSICCMP_at_trailing-edge.com <(CLASSICCMP_at_trailing-edge.com)>
Date: Tue Apr 27 07:26:55 1999

>My single biggest problem seems to be stopping a diagnostic once I've
>started it. So far I've been resorting to stopping the CPU and rebooting,
>but one would think that there must be a better way, and that I've missed
>it.

You don't have to reboot; you can often just halt the CPU and start
up XXDP+ again at the restart address (this is given at boot time as
a message on the console.) Some diagnostics (especially the really
extensive memory diagnostics) wipe out the XXDP+ monitor and you do,
indeed, have to reboot.

> CKK FA <xy> 1 11/44 Diagnostic ROM*
>My second problem is the first test, I can't find a KKFA*.* test. Is there
>another test I can run on the diagnostic ROM?

The diagnostic ROM *is* the test :-). This is the "big" bipolar
PROM located near the boot PROM's. And the test is executed at startup.

#3 is #3, but I think this is proper behavior

CKKABD0 11/44 TRAPS

NO FLOATING POINT OPTION PRESENT
NO CIS OPTION PRESENT
CONSOLE
17777707 023252
>>>


>#5 may or may not be a problem with the cache (real problem is my not
>knowing how to interpret it).
>
>CKKKAC0 11-44 KK11B CACHE
>
>RMI REGISTER (G5179) NOT USED-SKIP HI ORDER BIT ADDRESS TEST

The G5179 is the PDP-11/44 Remote Memory Interface (an extremely
rare option). You don't have it :-).

>UNIBUS EXERCISER NOT USED-DMA TESTS NOT PERFORMED

There was also an optional Unibus exerciser that could be installed
instead of the normal terminator. These aren't all that rare - they're
very commonly found inside 11/750's.

-- 
 Tim Shoppa                        Email: shoppa_at_trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
 7328 Bradley Blvd		   Voice: 301-767-5917
 Bethesda, MD, USA 20817           Fax:   301-767-5927
Received on Tue Apr 27 1999 - 07:26:55 BST

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