Re: Catbox, Catbox Sigs

Kevin Moore wrote:
> Turned out to be quite a simple fix. Bad rom socket.. Replaced and
> it's up and running self test now.
>
> Thanks for your help guys.
>
> Kevin
Ah, I bet pin 24 wasn't making contact - that would pull the data lines
all low...

John :-#)#
>
> On Tue, Feb 2, 2010 at 6:25 PM, John Robertson <pinball@telus.net
> <mailto:pinball@telus.net>> wrote:
>
> Kevin Moore wrote:
>> Thanks for providing the sig, I was about to run calcsignature to
>> get it.
>>
>> Anyways, Rom test came back as 0000, and since I know the rom is
>> good that can't be right :(
>>
>> How well do the flukes do the bus test? Since I've not ran into a
>> situation where the bus test has failed before.
>>
>> Ram test are showing faults but that may be due to some other
>> problem.
>>
>> Haven't had a chance to fully get into this guy yet, but wanted
>> to let you guys know what little progress I've made :)
>>
>> Kevin
>
> The BUS test (Fluke 9010A) is pretty good. It shows when address
> or data lines are stuck high, low or shorted together or to ground
> or Vcc. It also monitors Reset, NMI and any other CPU controlling
> inputs.
>
> Rom test of 0000 is interesting as I recall a blank 2K x 8 Eprom
> is something like 56xx. 0000 sounds like data lines shorted to
> ground. Have you tried reading any of the Eproms addresses? You
> should see some data in most of the addresses occupied by the
> Eprom, certainly the last few addresses will be occupied as they
> are the Reset and NMI vectors for the 6502 CPU.
>
>
> John :-#)#
>
>>
>>
>> On Tue, Feb 2, 2010 at 2:24 PM, John Robertson <pinball@telus.net
>> <mailto:pinball@telus.net>> wrote:
>>
>> Kevin Moore wrote:
>>> Haven't run the Fluke on it, but everything else. I'm
>>> assuming it's probably an addressing problem.
>>>
>>> Thanks,
>>>
>>> Kevin
>>>
>> Considering the simplicity of the CatBox running the 9010A
>> with the 6502 pod should show the problem up in seconds.
>>
>> The CatBox Eprom Fluke signature should be "B2DB" for the
>> Checksum version of the software - all versions (except my
>> prototype Cat Box) as far as I know are Checksum versions.
>>
>>
>> John :-#)#
>>>
>>> On Tue, Feb 2, 2010 at 11:52 AM, John Robertson
>>> <pinball@telus.net <mailto:pinball@telus.net>> wrote:
>>>
>>> Kevin Moore wrote:
>>>> Thanks, I have all that. I was just wondering if they
>>>> had done a sig analysis profile. Before I start hitting
>>>> it with the logic probe :)
>>>>
>>>>
>>> Ah, no, not to my knowledge. I usually fire up the Fluke
>>> 9010 about this time with non-working CPU based
>>> equipment... If you have a second Cat Box you can use
>>> that to troubleshoot the sick one...
>>>
>>> I would start (after verifying proper voltages) with
>>> substituting the RAM, then the CPU and finally the
>>> Eprom. This is the order I find failures in most CPU
>>> based equipment.
>>>
>>> If there are PROMs, then they are about as suspicious as
>>> RAM, however no PROMs in the Cat Box. ROMs are almost as
>>> reliable as Eproms in my experience.
>>>
>>> John :-#)#
>>>
>>>>
>>>> On Tue, Feb 2, 2010 at 11:06 AM, John Robertson
>>>> <pinball@telus.net <mailto:pinball@telus.net>> wrote:
>>>>
>>>> Kevin Moore wrote:
>>>>
>>>> Is there a Catbox Sig manual for the Catbox, or
>>>> for that matter one using an HP5004a to do sigs
>>>> on the catbox?
>>>>
>>>> I've got another cat box that the logic board
>>>> isn't running.
>>>>
>>>> Thanks,
>>>>
>>>> Kevin
>>>>
>>>> Hi Kevin,
>>>>
>>>> I have a scan of the Atari CAT BOX book, includes
>>>> schematic - its up on Tech Tools List FTP site
>>>> under CAT BOX...
>>>>
>>>> FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment
>>>>
>>>> Mail List Archive site:
>>>> http://seven.pairlist.net/pipermail/techtoolslist/
>>>>
>>>> Hope that helps! ROM images, POD sheets, etc. also
>>>> found there...
>>>>
>>>> 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
>>>> <http://www.flippers.com> "Old pinballers never
>>>> die, they just flip out"
>>>>
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>>>>
>>>>
>>>
>>>
>>> --
>>> 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 <http://www.flippers.com>
>>> "Old pinballers never die, they just flip out"
>>>
>>>
>>>
>>
>>
>> --
>> 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 <http://www.flippers.com>
>> "Old pinballers never die, they just flip out"
>>
>>
>>
>
>
> --
> 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 <http://www.flippers.com>
> "Old pinballers never die, they just flip out"
>
>
>

-- 
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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