Re: Fluke 9100/6800pod and bally mpu help needed.

Thanks John,
I tried what you and Corey have kindly suggested. From this I found 58e1 to
be the start location. When I try starting from this location it still wont
boot so I guess as Macro has pointed out it may just be hard luck.
It is a 9100ft that I am using and when I view the boot rom everything prior
to location 5800 is FF so I tried starting at 5800 as well but still no go.
Shame as I wanted to write a program specific to the bally MPU.
But at least the mpu board works with a real CPU in it now.

Thanks everyone for your help.
Steve

----- Original Message -----
From: "John Robertson" <jrr@flippers.com>
To: "Technical Tools Mail List" <techtoolslist@flippers.com>
Sent: Monday, October 06, 2008 5:11 PM
Subject: Re: [Techtoolslist] Fluke 9100/6800pod and bally mpu help needed.

> mail@nessandsteve.plus.com wrote:
>> Hello all,
>> I am hoping someone can help me out. Let me start by describing what has
>> lead me to this:
>> I receive a Bally MPU board P# r2518-35 (Star Trek) that needs
>> repairing.
>> I hook up the fluke and boot it up and get a bad clock error.
>> I notice someone has replaced the 74s37 with a 74LS00, so replcing it
>> restores the clock.
>> I "Run UUT" and the status LED stays on.
>> I check the jumpers and find that 2 are wired incorrectly so I set
>> them right and and I still get nothing.
>> After much head scratching and checking various things with a scope I
>> couldn't see a problem.
>> I replace the cpu and its socket with a spare and it starts the self
>> test process.
>> I continue on and it gets snagged on each step so replacing the
>> sockets on the RAM and PIA at U8 and U11 gets me to the second to last
>> test which failed due to a broken lead on c16. Replacing restored it
>> to fully working.
>>
>> So the MPU board is now completetly working on the bench but if I use
>> my fluke it will not start the self test process.
>> I have tried starting the "Run UUT" from address $1000 and $5000 as I
>> believe this to be the address for each ROM but still nothing.
>>
>> Just to be sure it was not a pod failure I tried a NOS one from the
>> shelf and got the same effect. (Both pods pass self test)
>>
>> Can someone point out something really obvious?
>>
>> Cheers
>> Steve
>>
>>
> "Run UUT" requires you to either accept the default boot location
> (recommended!) or enter it by hand.
>
> Your choices (1000h or 5000h) are not the boot location the CPU is looking
> for in the ROM code, if I remember correctly the boot location for a 6800
> is something like FFFEh or FFFCh - its in the manufacturers guide to the
> CPU in question.
>
> Best to simply power down the UUT, then power down the 9010, then power
> the 9010 back up and then the UUT and then do the "Run UUT" and press
> "Enter" twice without adding anything else. Should work if it works for
> the original CPU.
>
> John :-#)#
>
> --
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
> (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
> www.flippers.com "Old pinballers never die, they just flip
> out"
>
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Received on Tue Oct 7 15:11:48 2008