Re: 9010 Z-80 Pod Help needed

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@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
> [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Justin Johnson
> Sent: Saturday, March 09, 2013 7:09 PM
> To: Techtoolslist@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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Received on Sun Mar 10 01:34:12 2013