It's the same schematic, with the 43 ohm resistor changed from 1 watt to 2 watt. No, wait, there is a difference: the RC is now connected to the output of the regulator. There still isn't anything to keep the backup battery from backfeeding the 12 volt input, though.
There are two cosmetic changes to the print. First, it's got color. Second, it says
Quote:
Note: Use at your own risk,
Not supported by IFI.
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So I guess we're not going to find out the official theory of operation any time soon.