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New gary adapter board
The new board came in and it works great. The system is now 100% stable with 1.0MB chip and 1.5MB slow. See attached picture. I also attached the full KiCad project for those who want to tinker with it.
The SO pads are indeed a bit short for hand soldering. With a bit of patience it is doable though. I did not anticipate anything other than turned pins for the IC socket. I used turned pins and they fit great.
If anyone is interested drop me a PM. I have more boards left.
Just to be clear, this rev C Gary adapter is only needed when you want 1.0MB chip and 1.5MB slow. If you only want 1.5MB slow the original rev B adapter works good enough.
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