Operation Thunderbolt Speech ROM's?

jeff412

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Does anyone know which ROM or ROM's control the speech in Operation Thunderbolt? I changed chips on the board to fix a video problem. The video problem was caused by chip B67 04, which was the very last socketed chip on the board, so I ended up changing every single one. In the process I lost the speech. If someone knows which chip it is, it sure would save a lot of time. I wish I had noticed the speech disappearing when I changed the chips the first time.

Thanks,
Jeff
 
Update: Changed each chip until I found the speech chip. It is B67 07. Hopefully this will help someone someday.

Jeff
 
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