Re: Genuine DS1210 NVRAM controllers
I think on power off the supply voltage would drop quite slowly, at least in microprocessor terms. As it drops the processor might start doing random things including writes to memory.
I might still have the schematic of a z80 processor board with 56k battery backed ram, if I can find it still. It monitored the 50Hz from the power supply to force reset and write protect if power was cut.
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