[Techtoolslist] 9010 Z-80 Pod Help needed

[Justin Johnson]

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 at flippers.com

>> [mailto: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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