Re: [Techtoolslist] FW: Using 8080 pod on Midway 8080 boards (Space Invaders)

I can try sometime after I get back from this current business trip.

Sent from my iPhone

On Feb 21, 2013, at 9:55 PM, "David Shoemaker" <davids@oz.net> wrote:

> Any chance I could have you open one up and look at the ground lead on the
> twisted pin cable? I have an 8085 pod I tried to borrow the twisted pair
> cable from and it has the shield ground tied to pin 20. That doesn't work
> on the 8080 as that pin is +5. Ground should be tied to pin 2. I am
> wondering how they did that I suspect it is in the potted UUT end as I don't
> see anything on the connector end.
>
> David
>
>
>
> -----Original Message-----
> From: owner-rasterlist@vectorlist.org
> [mailto:owner-rasterlist@vectorlist.org] On Behalf Of Alex Yeckley
> Sent: Wednesday, February 20, 2013 4:15 AM
> To: 'David Shoemaker'; 'Technical Tools Mail List'; jrr@flippers.com;
> rasterlist@vectorlist.org
> Subject: RE: [Techtoolslist] RASTER: FW: Using 8080 pod on Midway 8080
> boards (Space Invaders)
>
>> Do your pods have the twisted cable or the straight? Both mine have
>> the straight.
>
> Our 8080 pods have the OEM twisted cables. Our 6502 pods (re: Clay's
> Tempest question) come in both twisted and the flat cables. I'm assuming
> the flat cable is a non-factory replacement item, but could be totally wrong
> about that. The 6502 pod that failed just happened to have had a flat cable
> but I'm confident the drive problem was unrelated; we found one specific
> driver output that wasn't going sufficiently high once plugged into a "real"
> target board. It wasn't a general malaise of the address lines like you
> might expect from transmission line losses or higher EMI susceptibility due
> to the flat cable if that's what you are wondering.
>
>> Are you using a 9010 or a 9100 to drive the pod?
>
> Both...
>
> Alex
> ----
> ayeckley@elektronforge.com
> www.elektronforge.com
>
>
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Received on Fri Feb 22 09:36:49 2013