Re: A89: Backups

To: assembly-89@lists.ticalc.org
Subject: Re: A89: Backups
From: Adam Davis <adavis@baladyne.com>
Date: Wed, 16 Dec 1998 13:27:07 -0500
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
References: <7447d82e.36774fb1@aol.com>
Reply-To: assembly-89@lists.ticalc.org

It is very close to a EEPROM, except that you don't need a higher(+12)
voltage to program it.
Think of a transister, where the middle semiconductor is 'floating', so
to speak.  If you move the conductor into place, the transister operates
normally, if it's out of place, it does not.  In an eeprom, it takes a
higher voltage to move it.  Flash was designed along those same lines,
but is able to move it using 5 volts.

This, of course, is a really quick-n-dirty explanation, but it will
serve to illustrate the principles.

-Adam

Daniel7073@aol.com wrote:
> 
> In a message dated 12/15/1998 10:12:54 PM Pacific Standard Time,
> nlmueller@students.wisc.edu writes:
> 
> > I'd guess that it doesn't.  If the flash ROM erased where would it get the
> >  data for v1.0 from?
> >
> >       --Nate
> >
> 
> I wonder how it keeps its information without power?  This is off-topic, but
> it's just a thought I had.
> 
> Daniel Imfeld

References:

Re: A89: Backups

From: Daniel7073@aol.com

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