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By Dermot Tynan, Monday, July 12, 2021

Solid-state pinball machines have a dark secret - they forget things. To hide this, the designers introduced circuits which can cause untold damage, if you're not aware of them. I'm about to educate you, so pay attention. This might just save your machine from an expensive repair bill, or indeed from the scrap heap. There are basically two kinds of memory chips used in earlier machines. RAM and ROM chips. RAM stands for "random access memory" whereas ROM stands for "read-only memory". RAM is what we typically think of when thinking about computer memory. It's an area where the processor...

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