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

Hi Steve,

While a PITA, I don't think it's too uncommon. I have a Z80 based
board on the bench right now that will do all the usual
troubleshooting stuff and now I've fixed it, work with a normal CPU,
however the run UUT simply won't do squat.

Martin.

On 7 Oct 2008, at 20:11, <mail@nessandsteve.plus.com> <mail@nessandsteve.plus.com
> wrote:

> 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 17:57:03 2008