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

[David Shoemaker]

Been a while but I am pretty sure I was able to run mine tempest with mine.

-----Original Message-----
From: techtoolslist-bounces at flippers.com
[mailto:techtoolslist-bounces at flippers.com] On Behalf Of Clay Cowgill
Sent: Tuesday, February 19, 2013 7:02 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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