Joey Nelson wrote:
I've verified that the images are identical using a chip programmer.
Any ideas on what might cause this? Any easy fixes?
Subtle timeing problems? Whats the speed rating of both parts?
How many address lines does the board really use? Its possible that if some of the address lines were floating that it might work with one part but not the other.
How big is your LB image. Try makeing mutiple copies of the image in the rom. Then it won't matter if the upper address lines float the wrong way.