Adelaide Board
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The Adelaide board is a daughter board containing the CPU and main system chipset for the A3010. It was used on early production machines as a temporary measure until some other arrangement came along. In fact, I think just about every A3010 I've seen has one of these so I don't think they are as rare as is sometimes made out. In September 2020, I received a replacement Adelaide board for my ailing A3010. Please click on the picture links above to see more.