Re: TI-H: EII questions
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Re: TI-H: EII questions
Yep, I'll mention that to Rich. He's the guru for nice looking calc
add-ons. :) As for the calc freezing... that happens when both lines
of the TI link port are pulled low. With the EII off this -will-
happen when the calc is on because of the way the EII is designed
(and there isn't much that can be done about that). However, as long
as the EII is turned on before or at the same time as the calc (as
the EII can initialize itself much more quickly than any TI calc can)
everything is ok. It may be possible to power from the TI's batteries,
but I'd rather use a 9V and a cheap regulator.
Nice drawings!
Bryan
Kevin Buck wrote:
>
> One important question...
>
> Ok, if people are talking about leaving the EII plugged in to the link port
> all the time, won't it not only cause a problem w/ the processor slowing to
> a crawl, or temporarialy freezing (until it is removed, as has been
> demostrated on several occasions w/ link port hardware items other than from
> TI)? But also is it going to be like the original ESF in which, it is a box
> and a cable w/ a plug? If so, won't this be irritating to leaved plugged in
> 24/7? Someone ought to design it be flush w/ the entire bottom of the calc,
> so it would be just as thick, or thinner than the calc itself, I did a
> little ASCII artwork to help picture my idea:
>
> ______________
> |2+2 |
> | 4|
> | Done|
> | |
> |______________|
> |F1 F2 F3 F4 F5|
> |2ND UP |
> |ALP <- ->|
> | DOWN |
> | |
> | 7 8 9 |
> | 4 5 6 |
> | 1 2 3 |
> |ON 0 . _ ENTER|
> |______________|
>
> Ok, there's an existing calculator, let's say the EII should look like this
> on the bottom:
>
> |~~~4 5 6~~~~~~|
> | 1 2 3 |
> |ON 0 . _ ENTER|
> |______________|
> |Here's the EII|
> |______________|
>
> See how the EII is flush w/ the bottom of the calc, and isn't in the way of
> work? And there's no box on a chord hanging down. This way, it could be
> left on, and if it looks good enough, glued on I suppose. And, it isn't in
> the way of the cover. It will probably just add about an inch or so to the
> overall length. Of course, it will either be plugged into the link port
> anyway, but a firmly mounted plug so it won't fall back and forth, not one
> that moves, or wired directly through the bottom, even allowing once again
> for it to be powered by the calculators batteries.And if you can't read my
> ASCII drawing, try copying and pasting it into Notepad in Windows. I think
> I did a right nice job myself.
--
Bryan Rittmeyer
mailto:bryanr@flash.net
http://www.bridges.edu/horizon/
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