[Techtoolslist] Fluke 6809 pod

[John Robertson]

On 03/17/2016 8:12 PM, Tony Jones wrote:
> On Thu, Mar 17, 2016 at 7:18 PM, teeray <teeray at earthlink.net> wrote:
>
>> [anyone] considering buying a Fluke cpu pod might want to check the Fluke 90 series
> oic.  I know nothing about the 90, what are the functional differences
> if any?  The display seems very small (prior ebay link).
>
> don't really want to touch the 'ridiculous' bit with a 10' pole ;-)
>
> thanks!
>
>
The 90 series was designed in Canada (Edmonton, Alberta) and worked 
fairly well as a clip-over the CPU type of exorcisor. I've got pretty 
much the complete set and they can be handy at times, especially if you 
don't have the pod for your 9010/9100. I have all the pods so these 
basically sit on a shelf.

These only work with CPUs that can support having their address and data 
lines floated when you select a particular CPU pin, AND that pin MUST 
have a pullup resistor on the UUT PCB. In some cases that pin was simply 
wired to Vcc, and then to able to use the 90 you have to cut the Vcc 
trace and add a 10K pullup.

The 90 works by cycle stealing, it runs when the CPU is on the opposite 
cycle. Rather cute in fact - the game can be running and you can run a 
RAM, ROM and I/O test at the same time!

It has a RS-232 port as I recall and if more folks on the list had these 
then I probably would have played more with mine and we may have made 
some use of it here.

Perhaps a show of hands of folks with the Z80 or 9809 Series 90?

If there is interest perhaps I can contact the designer and see if he is 
any more interested in sharing info on the unit than he was the last 
time I asked about six years ago...what I'd like him to do is write the 
story of the 90 series device, and what the heck, I will try contacting 
him again in any case. It would be nice to get the story out!

John :-#)#

-- 
How to subscribe or unsubscribe from TTL 
http://seven.pairlist.net/mailman/listinfo/techtoolslist