[Techtoolslist] 9010 Z-80 Pod Help needed

[Rodger Boots]

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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