[Techtoolslist] 9010 Z-80 Pod Help needed

[Rodger Boots]

UUT ribbon cable is 585141 according to pod manual.

On Sun, Mar 10, 2013 at 4:05 PM, Justin Johnson <rugd2go at 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 at 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 at 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 at flippers.com>

>>>>> >

>>>>> [mailto:techtoolslist-bounces@****flippers.com<techtoolslist-**

>>>>> bounces at flippers.com <techtoolslist-bounces at flippers.com>>]

>>>>> On Behalf Of Justin Johnson

>>>>> Sent: Saturday, March 09, 2013 7:09 PM

>>>>> To: Techtoolslist at 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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>

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