Re: TI-H: TI-85 Schematic

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: TI-85 Schematic
From: gussie@alaska.net (Grant Stockly)
Date: Mon, 19 Jan 1998 09:48:19 -0700
Reply-To: ti-hardware@lists.ticalc.org


>Does anyone realize that Mel Tsai is working on mappin the schematic of

I knew about it.

>the TI-85??? It sounds like he's quitting because no one is asking for
>it, but did anyone even know about it? I sure as hell would like to have
>a look at the schematic. There may not be that much use for it, but it
>would make many tasks easy, such as replacing the Resistor/Capacitor
>circuit with a REAL quartz crystal Occilator and running the calc at
>high, accurate frequencys. You could probably EMULATE RS-232 right from

If you could emulate RS-232, you could do it right now by pacing the input.
You are still missing important pins such as data terminal ready.

>the link port with a crystal! Also, it might be possible to improve the
>link circutry for higher speeds. ROM upgrades may actualy be a
>possibility (doubt it though due to dificulty). Just imagine! He said
>once that he had much of it done. I've mapped circuit boards before, but
>mapping something as small as a TI-85 is hell. Even if he isn't done, he
>could atleast give out the work he does have instead of making us do it
>all over again if we ever need it. If you want to see the TI-85
>Schematic, LET HIM KNOW!!! I sure as hell want to see it. If anyone else
>is interested, then let him know that there is _someone_ other than me,
>who "gives a Rat's *ss about it," to quote him.
>
>If no one cares, then I'll drop it, but imagine the hardware that could
>be done on it then!
>
>Put "TI-85 schematic" in the subject line so he sees it. He isn't on the
>list anymore, so if you e-mail him, use his address. I forgot what it
>was, but I'll also forward them if they are on the list or sent to me.

---
Grant Stockly
AppleCyber - http://www.alaska.net/~gussie