Re: 1 MB and 2 MB SRAM cards and Attribute Memory

John Justin (john@jjustin.com)
Fri, 20 Jun 1997 07:45:58 -0700

Glen Wilson wrote:

>>>More information please on this attribute memory, what does it do (and
how) and why is it important? Thanks for your efforts.
<<<

Sure ...

*Most importantly*, if you're not aware that you need to wait 5 seconds
after you turn the machine on, you may be tempted to tap the same icon a
number of times (or even tap a number of different icons!) before you
get an acknowledgement (reversal of the icon). The problem is that even
though you didn't get a reversal, the messages that get sent out (a
message gets sent out for each tap whether it reverses or not!) will be
stacked and sequentially executed after the 5 second delay period.
Depending on what icons that you've tapped and how the programs are
written that are fielding the messages, it's possible to crash the
programs, Geos, or both - causing data loss, corrupted databases, etc.

On a lesser note ... If you're using a program where you need to
continually enter data between power ons and offs, you wouldn't want to
wait 5 seconds every time you turn the machine on before you can make an
entry. Believe me, it gets old very quickly! For example, with my
Fitness Tracker program, after you do an exercise set you turn the
machine on, make an entry (weight, reps, time, etc.) then turn the
machine off again to conserve battery usage, while your performing your
next set.

Every time you turn on the unit, the PC card gets scanned (to see if it
is compatible with the Omnigo). The purpose of the attribute memory,
simply put, is to keep the necessary information about the card in a 2
KB buffer and thereby obviate the need to scan the entire 1 MB or 2 MB
card.

Hope this helps!

Best,
John

-- 
JJA Microsystems, N.Y.     1-800-765-7770   
john@jjustin.com           http://www.jjustin.com                    
The FastChargers... Fast charge your handheld's batteries in 45 mins!
Save the environment - use Nickel Metal Hydride rechargeable batteries!