[Techtoolslist] 9010 Z-80 Pod Help needed

[Rodger Boots]

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@**flippers.com<techtoolslist-bounces at flippers.com>

>>> [mailto:techtoolslist-bounces@**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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>