Re: TI-H: TI-89

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: TI-89
From: gussie@alaska.net (Grant Stockly)
Date: Fri, 20 Mar 1998 13:07:50 -0700
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


and you can't just power the chip alone...you have to be constantly sending
the RAM data or else the refresh circut will realy get messed up

>Do you know what happens when you turn the computer off?  The memory erases
>itself!  If you want to do that, you need to keep it powered CONSTANTLY,
>because when it loses 'tricity, it becomes empty.
>
>
>>Hey, the way that the memory works in all the calculators (except 92
>>maybe) is all the memory is reset when the batteries are removed.  This
>>means that this is ram and not flash ram.  Now a cheap way to expand the
>>memory might be to use the old 1MB 30-pin SIMMs from computers.  Those
>>are very easy to find at a very cheap price.  If someone had enough time
>>to make those into a memory expander, then memory expanders would be a
>>lot easier to build and there wouldn't ever be a problem of finding
>>memory chips or parts being discontinued.
>
>Wait a minute, they don't make those anymore!  Try finding someone who will
>sell one!

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