Re: RASTER: FW: Using 8080 pod on Midway8080 boards (Space Invaders)

I seem to remember that 99% of the time it was fine, but ocassionally i
would come across a pcb where it might crash or the vectors might get
messed up in game mode. I seem to remember this one only maybe 1 or 2
pcbs out of 20?

When i come across pcbs that wont run UUT, i don't panic over them too
much, because it doesn't affect any other diagnostic function (i use a
9100A)

The other games that wont run UUT are later multiple-cpu type stuff, but
i do get it a lot with 68000 games, again, i don't worry about it too
much, just something to bear in mind.

FWIW - i've never seen a fluke pod with a non-twistedpair cpu cable, and
i've seen tonnes of the blighters.

Andrew Welburn
http://www.andys-arcade.com

On 20/02/2013 04:14, David Shoemaker wrote:
> Been a while but I am pretty sure I was able to run mine tempest with mine.
>
> -----Original Message-----
> From: techtoolslist-bounces@flippers.com
> [mailto:techtoolslist-bounces@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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Received on Wed Feb 20 04:09:37 2013