[Techtoolslist] RASTER: FW: Using 8080 pod on Midway8080 boards(Space Invaders)

[Alex Yeckley]

Yes, we're able to run Tempest boards with a standard 6502 pod with no
problems also.

Alex
----
ayeckley at elektronforge.com
www.elektronforge.com  


>-----Original Message-----

>From: techtoolslist-bounces at flippers.com 

>[mailto:techtoolslist-bounces at flippers.com] On Behalf Of Clay Cowgill

>Sent: Tuesday, February 19, 2013 10:02 PM

>To: 'Technical Tools Mail List'

>Subject: Re: [Techtoolslist] RASTER: FW: Using 8080 pod on 

>Midway8080 boards(Space Invaders)

>

>> We have seen a failure of a

>> 6502 pod such that the address driver line was "weak" and couldn't 

>> always drive successfully drive the pin above the TTL 

>threshold.  That 

>> same pod would pass its own self test, presumably because 

>the loopback 

>> inputs of the pod have higher impedance than the target 

>board address 

>> lines.  Perhaps something like that is happening here?

>

>Out of curiosity, has anyone successfully run Tempest from the 

>6502 pod?  I never had any trouble using one to poke around in 

>memory and test stuff (way back with the Tempest multigame), 

>but my Tempest machine would never 'run'

>from the 9010.  Tried a couple different CPU's and maybe even 

>a 9005, but I only had one 6502 pod...  Never really knew if 

>it was just my machine, the pod or both...

>

>-Clay

>

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