[Techtoolslist] Fluke 9100/6800pod and bally mpu help needed.

[mail at nessandsteve.plus.com]

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



> mail at 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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