TI-H: Re: TI-92 Memory upgrade
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TI-H: Re: TI-92 Memory upgrade
> > ___________
> > =| |====.
> > =| Toshiba |===. '.
> > =|___________|==. '. |
> > ___________ | | |
> > =| , |==' ,' |
> > =| ^uos |===' ,'
> > =|__________ |===='
Like the sony above? Upside down? but without my Toshiba chip?
I'm not suprised.
I'm sure you're right. it's the mirroring stuff i was talking about before.
What we need to do is map out the pins for the ROM module, and since it's been
done already, We may have all the pins. We just need to check the chip's data
sheet to learn what the pins are. Once we know that, we can map them all
straight to the ROM module port and then ANY TI-92 should be upgradable!!!
Sound interesting???
It may even be possible to make a module that even just plugs in, between the
normal ROM module. You'd need to cut a hole for it possibly. Maybe not.
depends on how thick it was. Imagine just plugging in a RAM expansion board
and it would add 128K!!! That would be cool!!!
> mine looks like this: but the word sony is inverted... I.E. the chip is
> inverted.. so the above drawing is not right in that respect.
>
> I say if we cant find the chips at least look for someone with a smashed
> 92 that they will sell for cheap... use the RAM out of that.
> I dont realy care about cost.... I would shell out 50 bucks for a
> worthless 92 just to get the chip.... then u could have the board to map
> out....
>
> >Notice how the traces turn on the side? That means that the chip is
> turned and might sugest a diferent pin layout, a Sony chip for
> example???
>
> >What if you simply soldered a Toshiba chip into the top slot??? Me, a
> Sony
> >into the bottom slot??? Who knows!!! It might work.
>
> they might have just made the boards that way so that they could use
> either the toshiba or sony... whatever was available at the time...
> which means we are back to piggybacking them like on the guys page..
--
Richard Piotter
richfile@prairie.lakes.com
The Richfiles TI Hardware and BASIC web page:
http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
References: