Another goofy tempest problem.

Talon2000

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In game mode no video plays blind.

In test mode,

You get all the 01001001 like normal, but no letters for the spinner, and no bound boxes.

The Diamond pattern is 2x normal size, as is the color bar screen
The crosshatch screen normal
The Bip align screen missing completely.

This also matches up with what I see on my scope.
Using a known good test bench setup.

So I'm thinking it might be in the Bip circuit somewhere, but before I tear into that, I thought I would ask to see if anyone has seen something like this?
 
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