XXDP generic memory test

Jacob Ritorto jacob.ritorto at gmail.com
Thu Jan 29 20:24:22 CST 2015

speaking of memory tests, I found a fully populated ms11 board in
(horrible) storage, complete with freaking MOUSE DROPPINGS.  I just cleaned
it really well with electronics cleaner spray and a hard toothbrush, dried
it thoroughly, installed and and ran ?msd?? for like 15 passes.  TOTALLY
FLAWLESS, 0 errors.  These machines are amazing sometimes.  It's like the
volkswagen bug of computing.  (and this is with my good 11/34 board set
that is not exhibiting the mysterious zero errors).

On Thu, Jan 29, 2015 at 7:17 PM, Johnny Billquist <bqt at update.uu.se> wrote:

> On 2015-01-29 21:24, Lyle Bickley wrote:
>> On Thu, 29 Jan 2015 13:51:03 -0600
>> Roe Peterson <roeapeterson at gmail.com> wrote:
>>  I just can't seem to figure out the right XXDP file to run for a
>>> straight memory test.
>> Most all of the questions related to PDP-11 diagnostics are answered in:
>> http://bitsavers.trailing-edge.com/pdf/dec/pdp11/xxdp/
>> PDP11_DiagnosticHandbook_1988.pdf
> Yes. That is a really useful source of information (I have a hardcopy of
> it).
> In addition, many manuals for specific devices or CPUs actually have
> information about the specific XXDP tests for that device in the technical
> and/or user manuals.
>         Johnny
> --
> Johnny Billquist                  || "I'm on a bus
>                                   ||  on a psychedelic trip
> email: bqt at softjar.se             ||  Reading murder books
> pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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