Would it be possible to use NVRAM instead of a battery in a 4 slot neo geo? Anyone ever look into this?
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After looking into this and reading on the Neo-Geo forums I think I'm going to go with a super capacitor. No one has tested NVRAM successfully on these boards but they have had decent luck with a super capacitor. My preference is to remove the battery entirely (even if it eliminates the clock from working properly).
Obviously most people are fine with coin cell batteries but I think we can do better than that!
how long would the super capacitor last ? Very interesting.
Cmdr Brain— thank you for that. Exact technical help I was looking for to figure this out. I knew someone on these boards has the knowledge!
I have schematics but their resolution scan is horrible and I think I may just have to follow traces. What you wrote there is a huge help to get started.
If anyone has nice clean schematics of a 4slot board please let me know. The ones off the Neo Geo wiki site are not that high res and are difficult to read.
People have the knowledge... you just chose to ignore it and reply to people posting completely irrelevant pictures of MCR boards.
Hint: the battery backed ram is SMD.
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Forgive me but what knowledge have I ignored?
So you mean the ram is a surface mounted device and therefore simply swapping out a chip isn't the solution - which is unfortunate but not surprising otherwise everyone would have done this already.
Can I assume you are trying to tell me this may be more work and effort than it is worth since it isn't a simple chip swap out?
Like I said originally, I've been doing this for >10 years...
It's just a simple chip swap, as long as you can desolder and replace SMD chips -- but most people can't..