[Techtoolslist] Fluke on Mario Bros.

[Jess Askey]

Are there any dips or jumpers that might be triggering the code to reset them each boot?



Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: John Robertson <jrr at flippers.com>
Date: 4/19/18 9:36 PM (GMT-07:00)
To: techtoolslist at flippers.com
Subject: Re: [Techtoolslist] Fluke on Mario Bros.

On 2018/04/17 9:24 AM, John Robertson wrote:
> Hi David,
>
> I too am having a problem with a Mario Bros game. Can read and write
> to the CMOS RAM (passes all RAM tests), but it won't save settings
> when turned off then back on. Self tests are also good.
>
> Annoying!
>
> Anyone else run into that? I'm thinking of ripping out the CMOS
> battery circuit and replacing with an NVRAM and direct connection to
> the /CS instead of the transistor & /Reset circuit that is there now.
> If it works I will let folks here know.
>
> And I still get the CTL ERR message below when using the BUS TEST even
> after turning off the Error flags.
>
> John :-#(#

Further to this, removing all the CMOS battery circuitry and /CS and
simply installing a NVRAM and jumping the /CS and Vcc did not change the
results. It still won't store the High Score or Free Play settings. It
adjusts them on screen, but cycle the power and Free Play and/or High
Scores go away.

Was there a software version for Mario Bros which did not allow for
battery backup memory? That is able all i can think of as the Fluke does
a proper read/write to the memory location just fine (6800h to 6FFFh).
Fortunately the customer doesn't care so I am not going to sink any more
time into this problem - for now.

However if someone has a bright idea I am more than willing to listen as
it annoys me. It may have something to do with the Z80 DMA controller, I
know nothing about them...

Thanks,

John :-#(#

>
> On 2011/11/16 11:29 PM, David Shoemaker wrote:
>> Looking at the manual for the Z80QT pod and the schematic I think I am
>> getting an expected result.
>>
>>
>> I hooked up the pod and hit BUS to run the bus test.  I immediately
>> get back
>> CTL ERR showing 00000010 this is the HALT line.  Looking at the
>> schematic it
>> appears HALT and INT are both tied together and pulled high.  So the
>> fluke
>> can't exercise that line.
>>
>>
>> Any way to ignore that error and verify the rest of the bus test?
>>
>>
>> Oh and according the manual maximum clock frequency is 8.0 mhz. Does
>> that
>> mean this pod support Z80A/B/C ?
>>
>>
>>
>>
>> From: David Shoemaker [mailto:davids at oz.net]
>> Sent: Wednesday, November 16, 2011 10:38 PM
>> To: 'Technical Tools Mail List'
>> Subject: Fluke on Mario Bros.
>>
>>
>> Anyone know if you can use either the base z80 pod or the z80qt pod
>> on Mario
>> bros?
>>
>>
>> I know it uses the Z80A but I don't know what the pod is rated at.
>>
>>
>> Thanks,
>>
>> David
>>
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>>
>

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