Re: 9010 Z-80 Pod Help needed

UUT ribbon cable is 585141 according to pod manual.

On Sun, Mar 10, 2013 at 4:05 PM, Justin Johnson <rugd2go@comcast.net> wrote:

> I swapped the Z80 and the 6532. Here is the interesting part: When I
> swapped the Z80 no change but when I swapped the 6532 pin 28 of U4 was now
> high. I thought that was a good sign so I decided to run the self test
> again and it failed. I then checked Pin 28 of U4 again and it was low
> again. What I suspect is that when I purchased the new cables for the POD
> the guy shipped me a 8085 40 pin cable rather than the z-80 and pin 20 of
> the cable grounded. When I ohm out the 40 pin cable pin 20 is connected to
> the ground lug that goes to the screw on the metal standoff. The number on
> the 40 pin cable is 685495. Can someone verify the cable number is correct?
>
> Thanks
>
> Justin
>
>
>
>
> On Mar 9, 2013, at 10:50 PM, Rodger Boots wrote:
>
> Probably a better chance of the Z80 being bad (or pin 20 not connected).
>>
>> On Sun, Mar 10, 2013 at 12:44 AM, Justin Johnson <rugd2go@comcast.net
>> >wrote:
>>
>> I have a 6502 pod so I will try swapping the 6532 IC tomorrow and see
>>> what
>>> happens. If nothing else I can eliminate something.
>>>
>>> Thanks
>>>
>>> Justin
>>>
>>>
>>>
>>>
>>> On Mar 9, 2013, at 10:33 PM, Rodger Boots wrote:
>>>
>>> Rereading the original complaint it appears bit 3 (not bit 5) was
>>> failing.
>>>
>>>> Bit 3 is IORQ (pin 20).
>>>>
>>>>
>>>> On Sat, Mar 9, 2013 at 11:12 PM, David Shoemaker <davids@oz.net> wrote:
>>>>
>>>> Sounds like replacing the 6532 is in order (it's an IO chip). Those
>>>> are
>>>>
>>>>> used in all the pods I think so you could try a swap and see if that
>>>>> fixes
>>>>> the problem.
>>>>>
>>>>> -----Original Message-----
>>>>> From: techtoolslist-bounces@**flippe**rs.com <http://flippers.com><
>>>>> techtoolslist-bounces@**flippers.com<techtoolslist-bounces@flippers.com>
>>>>> >
>>>>> [mailto:techtoolslist-bounces@****flippers.com<techtoolslist-**
>>>>> bounces@flippers.com <techtoolslist-bounces@flippers.com>>]
>>>>> On Behalf Of Justin Johnson
>>>>> Sent: Saturday, March 09, 2013 7:09 PM
>>>>> To: Techtoolslist@flippers.com
>>>>> Subject: [Techtoolslist] 9010 Z-80 Pod Help needed
>>>>>
>>>>> Hi Guys,
>>>>>
>>>>> I'm hoping I can find some help fixing my Z-80 Pod. Here is the scoop
>>>>> and
>>>>> I
>>>>> will try to make this short. I purchased a Z-80 pod with the cables
>>>>> cut
>>>>> off. Found a new set of cables and tried a self test. The self test
>>>>> gave
>>>>> me the failure code 00. I then used a 40 pin socket and removed pin 29
>>>>> as
>>>>> suggested in the manual and placed the socket on the pod pins and
>>>>> reinserted
>>>>> the 40 pin connector into the pod for a bus test. I then got a CTL ERR
>>>>> 00000000 00001000- LooP. As I understand it that shows an issue with
>>>>> driving bit 5. Am I correct that this is address and data line 5? I
>>>>> used
>>>>> my
>>>>> logic probe and probed the data lines of U4 or R6532AP. I found that
>>>>> pin
>>>>> 28
>>>>> of
>>>>> U4 which is the R6532AP has Data line 5 low while the other data lines
>>>>> are
>>>>> high. Where do I go from here? Any help or suggestions would be
>>>>> appreciated.
>>>>>
>>>>> Thanks
>>>>>
>>>>> Justin
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Received on Sun Mar 10 17:11:37 2013