Nice! I haven't replaced the PRAM batts from my 500s, yet, I didn't know where to find them...I searched AppleMacParts, but it looks like I'm yielding the wrong sources still! I've decided my PBs will probably be anchored to my desk anyways, so it might not be worth the trouble looking for these myself? Sounds like yours could be NOS OEM? I'm wondering how old and how long they could last
You really attempted this? I was reading through his steps, and wanted to try it out myself, but never got around to picking up the RAM. I've been trying to find higher capacity RAM chips to try this out; I assume the chips on the RAM board are 2MB a piece, so if I could find 4MB chips, one could have 32MB each side for a total of 64MB.
Edit: congrats on the modification! Good to hear it worked out! I'll need to give it a go myself when I get a chance.
So that's the other thing, if it's even possible to detect higher capacity. I believe someone has tried adding more RAM through the PPC daughterboard, which NewerTech has done before with the NUPowr 183c, but finding one of those, much less with on-board RAM, feels next to impossible these days...my new Holy Grail. Anyways, if you're up for a read, this guy hacked a 183c to incorporate a total of 64MB (including RAM module...I think this daughterboard didn't have RAM? I don't understand from the translation though) and overclocked the 603 to 200MHz (had to build a custom cooling fan on the stiffener though):
http://itoi.jp/pb550-5.html
Translated version:
https://translate.google.com/translate?hl=en&sl=ja&u=http://itoi.jp/pb550-5.html&prev=search
Hacked NUpowr 183c from the website above:
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