[Techtoolslist] 9010 Z-80 Pod Help needed

[Rodger Boots]

Not quite.  It's saying it can't drive control bit 5, in this case the
write line (pin 22 of processor).

Or at least that's my interpretation.



On Sat, Mar 9, 2013 at 9:09 PM, Justin Johnson <rugd2go at comcast.net> wrote:


> 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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