>>I/O board 620-0117 (with the battery & switch, battery perhaps removed)

>And speaking of which, what does this blasted switch do?  I've been wondering
>for 10 years.

The switch disconnects the battery.

I believe it was intended to be switched off for storage. Since the battery
lasts only a day or two when power is disconnected, it should probably be
turned off whenever you unplug the Lisa for more than a couple of hours.
Though you need to remember to turn it on again to charge the battery...

The battery keeps the clock running when power is lost, it also preserves a
few bytes of parameter RAM.

HTH,

James

James MacPhail                   "Think not of engineering as art,
[EMAIL PROTECTED]                 but of art as engineering"
Sigma Seven Systems Ltd.
[EMAIL PROTECTED]        <http://SigmaSevenSystems.com>



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