Re: Battery back upped ram?

[gdr@myrias.ab.ca (Devin Reade)]

In article <CzHv5J.D42@actrix.gen.nz> dempson@atlantis.actrix.gen.nz (David Empson) writes:

>There was: Applied Engineering (R.I.P.) had a device called the
>RamKeeper, which worked with their RamFactor card to preserve its
>contents over powerdown.  I believe it was mains powered, or perhaps
>that was just a charging circuit for the RamKeeper.

It works with more cards than just the RamFactor.  The manual lists
about 8 or 10 with which it was tested.  I've used it with the standard
Apple IIgs 1Meg memory card, AE GSRam+, and the GSJuice+.  Although
the Ramkeeper can take two memory cards, there is some sort of
incompatibility when using the GSJuice+ and the Apple 1Meg card.

If the IIgs is powered up, power is taken from the motherboard.  When it
is shut down, power is taken from a mains transformer.  If mains power
fails, power is taken from one or more gel-cell batteries.  The amount of
time the battery lasts is dependant on how much memory you have, but I
think it can last up to 3 hours.

--
	Devin Reade		gdr@myrias.ab.ca