[Techtoolslist] fluke 9010a not booting

Thu Aug 10 17:54:52 EDT 2017

Is the I/O Address available for the watchdog? if you right to it it should
"stop" barking... sadly your going to need to look at maybe decompiling the
code to determine what it is doing.

William Stillwell

Board Member - Inspiration labs, Inc. a 501c3 organization

Board Member - West Central Florida Group, Inc. a 501c3 organization

Board Member & Co-Founder - Byte Amusement Group // Free Play Florida
Arcade & Pinball Show a 501c3 organization

Board Member - Clearwater Amateur Radio Society

On Thu, Aug 10, 2017 at 5:50 PM, Grant Goodes <grant.goodes at gmail.com>
wrote:

>    Yes, as I said in an earlier posting, having finally acquired a z80
>    pod, we have been using my working 9010a to test the bad one, and Bus
>    Test is OK, and then going through the various tests described in the
>    Service Manual.  That's how we figured out that the U62 bank-select
>    PROM was bad.  Alas, the Watchdog and other auxiliary circuitry really
>    can't be tested directly by the second 9010a.
>
>    On 2017-08-10 5:47 PM, William Stillwell wrote:
>
> doesn't the 9010 run on a z80, just connect up your pod and test it.
>
> William Stillwell
>
> Board Member - Inspiration labs, Inc. a 501c3 organization
>
> Board Member - West Central Florida Group, Inc. a 501c3 organization
>
> Board Member & Co-Founder - Byte Amusement Group // Free Play Florida
> Arcade & Pinball Show a 501c3 organization
>
> Board Member - Clearwater Amateur Radio Society
>
> On Thu, Aug 10, 2017 at 5:37 PM, Grant Goodes [1]<grant.goodes at gmail.com>
> wrote:
>
>
>    Another little tidbit: Before we fixed U62, you'd just get no display,
>    and then after maybe 4 seconds, a beep, then nothing more.  Now we
>    still have no display, but the unit is silent for a good 8 seconds, and
>    _then_ a beep, followed by a new beep every 4 seconds.  The 4 seconds
>    is the timeout on the watchdog.  So the unit is doing something for the
>    first 8 seconds, and then gives up and goes into a reset loop.
>    Also, tested the display/keyboard unit in my good 9010a, and it is
>    fine.
>    grant..
>
>    On 2017-08-10 5:08 PM, Grant Goodes wrote:
>
>    OK, I've been helping Robert with his problem (when I replied that I
>    was helping my friend with a similar problem, I didn't realize he had
>    joined the list and asked here about his problem!  My friend and Robert
>    are the same person!)
>    We did some more debugging:
>      * The U62 bank-select PROM _was_ bad, and having reprogrammed a new
>        one with correct contents, are getting valid checksums for version
>        3A of the firmware on all the ROM contents
>      * With the correct contents, and using Run UUT with the second 9010a,
>        we hear a new beep every 4 seconds, but no display contents
>      * We seem to be seeing a watchdog issue: Running the display and
>        keyboard tests (triggered by writing non-zero values to 0x10081),
>        we see the tests begin and then stop.  In particular, the display
>        tests should run continuously but they stop after ca. 4 seconds,
>        which implicates the watchdog
>      * Trying R14 to ground, which disables the watchdog, allows the
>        display and keyboard tests to run normally: The display unit is
>        fine
>      * Testing out the Probe PIA, we seem to be seeing correct signals,
>        but that testing uses the R14/watchdog-disable, so that may not
>        prove anything.
>
>    Does anyone have any ideas on how to debug the Watchdog?  There really
>    isn't that much in the Service Manual on this part of the circuit.
>
>    grant..
>
>    On 2017-08-08 3:05 PM, robert via Techtoolslist wrote:
>
> my fluke 9010a rev 3a is not booting the diplay doesnt go on i think its a
> watch
> dog problem i have the service manual but it doesnt seem to cover the 3a
> rev fir
> mware for the rom signatures all my power test points are good and also i
> get a
> beep when power on but no display does anyone have any idea what could be
> the ca
> use of the shutdown
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> References
>
>    1. mailto:grant.goodes at gmail.com
>    2. mailto:1]Techtoolslist at flippers.com
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>    4. ftp://ttl.arcadetech.org/TTL/Test_Equipment
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>   11. https://pairlist7.pair.net/mailman/listinfo/techtoolslist
>   12. ftp://ttl.arcadetech.org/TTL/Test_Equipment
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>   14. mailto:Techtoolslist at flippers.com
>   15. https://pairlist7.pair.net/mailman/listinfo/techtoolslist
>   16. ftp://ttl.arcadetech.org/TTL/Test_Equipment
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