Sega-Naomi

Anyone have any how too guides on connecting NAOMI dimm's to extrnal DC power supply that can be left on at all time to preserve DIMM RAM?



I am getting tired of waiting for the checking ram, loading game, reboot sequence every time I want to play a GD-ROM game.



Leaving the cabinet on for 12-24 hour to charge the dimm seems like a awful waste of energy, I don't need the monitor and mb on, just want to keep the DIMM RAM in tact.



Any info greatly appreciated.



Thanks

Bob Presutti

Technically speaking, if 3.3v is constantly supplied to the RAM, the contents will never be lost. On PC100 RAM, Pin1 is Ground and Pin6 is 3.3v. I would not suggest directly supplying power to the battery connector because it has a charge circuit on it and I don't know how it would react to the absence of batteries. If someone on this forum knows more about this, feel free to chime in. :smt023

I am concerned as well about the charging circuit



Is this still the best thread for replacing battery with fresh battery and bumping up capcity to 2200mA?





http://www.sega-naomi.com/forum/viewtop ... ttery#1001

AFAIK, it sure is. :smt045



P.S.



What I meant in my previous post is, that if you supply 3.3v after the charging circuit that it should work. The charging circuit should be isolated from the memory section. I also mentioned the battery connector because I didn't want you to get the idea of connecting a power supply directly to that circuit. This, of course, means that you would need to find somewhere on the circuit board to connect/solder the power terminals. This would need to be done carefully as you could potentially disable the memory by cutting off the chip's supply.

you can connect a 7.5V ac/dc converter at the Dimm boards akku connector.needs at least just apx 7mA current, so a very small ac/cd converter will do it. as the result you do not need a battery...