adam> Just a slightly naive question, but, woulde a deads nvram battery on the
adam> logic board ruin an attempt to boot from an install floppy?

Generally speaking, I don't think so, I had several experience
to play with Open Firmware with battery disconnected on my StarMax
3000/200 which is 4400/200 or similar to 7220 PPC603 OF 2.0.2 machine.

But it depends the machine type I am afraid,
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(Makoto Fujiwara)