Upgrading TSROM board to Use Batteries?
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1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.
Upgrading TSROM board to Use Batteries?
I have a game that I am wanting to put on a board, but I do not have a TKROM game to use, only a TSROM. I noticed that you can add a battery to a TSROM game (Like said here ----> http://www.nesreproductions.com/mapper4b.html ) But I can not find instructions on how to do this? Can someone shed a little info on this subject =) Its a custom game that I edited that I am trying to get working. Thank you
- Lloyd Gordon
- Posts: 150
- Joined: Mon Nov 07, 2005 11:32 am
- Location: Toronto
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Here you are the official way to connect a battery (used in licenced cartridges).
Material needed :
- 2 diodes (lowest forward voltage is the better)
- 2 resistors (1 kiloohm)
- 1 capacity (2.2 microfarad) (optional, but recommanded)
- 1 battery (obviously)
Power suply (VCC) of RAM connected in parallel with the capacity (polarized correctly) to the cathode of the two diodes.
The first diode goes directly to VCC, the segond diode connects to the positive born of the battery trough the 1 kiloohm resistor.
The last resistor must go from the positive CE line to ground, so that when the MMC isn't powered, the line is effectively to ground.
Early SNROM boards (revisions 02 and 03) does lack the capacity and the result is saves being often corrupted.
Material needed :
- 2 diodes (lowest forward voltage is the better)
- 2 resistors (1 kiloohm)
- 1 capacity (2.2 microfarad) (optional, but recommanded)
- 1 battery (obviously)
Power suply (VCC) of RAM connected in parallel with the capacity (polarized correctly) to the cathode of the two diodes.
The first diode goes directly to VCC, the segond diode connects to the positive born of the battery trough the 1 kiloohm resistor.
The last resistor must go from the positive CE line to ground, so that when the MMC isn't powered, the line is effectively to ground.
Early SNROM boards (revisions 02 and 03) does lack the capacity and the result is saves being often corrupted.
Last edited by Bregalad on Sat Mar 10, 2007 1:55 pm, edited 2 times in total.
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