Re: TI-H: Ti 81 Link? huh?

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Ti 81 Link? huh?
From: Matthew Andersen <MAndersen@DHVX20.CSUDH.EDU>
Date: Tue, 30 Sep 1997 21:03:38 -0700
References: <19970930205112.24540.qmail@hotmail.com>
Reply-To: ti-hardware@lists.ticalc.org
When i get my quick cam back friday i'll take a pic of it... but it
looks nothing like the 85 board... and i've spent hours over my 85
board... (ROM 10)... and see i was thinking that maybe ti made 1 board
for the 82 and 81... and just put the different roms and parts for each
one... I'm going to try to get my hands on an 82 and open it up... my
school has tons of them and most are broke so i can get it... like it
turns out that this "BROKEN" 81 just needed batteries... I hate my
school district... but hey i get free stuff... hehe... anyways... it
really looked like the 3 hook ups from the 85 rom 10 link so i don't
think it was that back up thingy you were talking about...

One quick question... wouldn't the capacitor run out after like a couple
of days... or hours... (not hours ti wouldn't be that dumb, would they)

MAndersen@dhvx20.csudh.edu

p.s. Anyone here have IMP for math... just a question...


Richard Piotter wrote:
> 
> >I was just wondering if there was anything other than turboing that you
> >could do to a TI 81? Such as a link or something?
> >
> Hey, is this a new TI-81 or an old one, preferably what year did you buy
> it? Some new TI-81s use a different form of battery backup. I believe it
> is actualy a backup capacitor. The backup battery is replaced with a
> plastic cover. I knew there were diferent TI-81 models, so some may be
> based on the TI-85 with a TI 81 screen and ROM, plus a few
> modifications. I spend a ton of time last night trying to fix Austin
> Butlers TI-85 and it had a wierd mainboard. It had a notch about 1/2
> inch deep and 3/4 inch wide (~1x1.5 cm) and thre are 3 contacts. The
> three contacts connect to a short ribbon cable that leads to another
> tiny board with just a link connector attached. Send me a photo of your
> TI-81 and I'll scan and post it. I can see if there is a possibility of
> it being an 85 board with an 81 screen and ROM. It is possible that,
> since the 85 is a DIRECT decendant of the 81, that TI may have used
> TI-85 boards (or ones similar) for the TI-81. I won't say I'm sure, but
> it's a possibility. Comodore used to modify older model drive and
> computer boards with newr ROM to save money in production. TI may have
> done this for a very short time, probably when the 85 was new and didn't
> have a set board design. I need to ask Austin Butler what year he bought
> his calc. If they were purchased in the same year, that wpuld be a good
> indication that TI had at one time done this! Can you imagine if a TI-81
> to 85 upgrade were possible! TI-81 ASM possibly!
> 
> Don't chew me out over this. I know that the ROM would need replacing,
> but if it were possible, you could possibly do alot more!
> 
> Richard Piotter
> 
> e-mail: richfiles@hotmail.com
> 
> home page: <A
> HREF="http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html">The
> Richfiles</A>
> 
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