Re: TI-H: new lcd (possibility of color?)
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Re: TI-H: new lcd (possibility of color?)
I don't know if this helps any, but I saw a 3-color graphing calc in a
service merchandise catalog a while ago...I think it was a Casio (may have
been toshiba). You might get some tips from that machine about how to do it
on the TI's. I believe the machine was only about 70 bucks.
-Gabe
-----Original Message-----
From: Richard Piotter <richfile@prairie.lakes.com>
To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
Date: Thursday, May 28, 1998 12:15 AM
Subject: Re: TI-H: new lcd (possibility of color?)
>
>> >also, it would be really cool to recode the rom to support color. this
>> >probably isn't possible, but if anyone is willing to take a stab at it,
i'm
>> >here, and i have a broken 85 we can do it with =D
>>
>> 1) This is hard to do
>>
>> 2) Color LCDs cost more
>
>Put it this way, it is possible to do, but I for one wouldn't want to carry
>the burden! (:
>
>There are a few ways. You could completely rewrite the ROM with color
graphics
>routines compatible with standard data output for a purchased color LCD (TI
>most likely uses a proprietary data format for transmitting video data to
the
>LCD).
>
>Or you could have a decoder type of chip and do page flipping, like
grayscale
>is done. I have no clue how this could be done either.
>
>The easiest option would probably be to build a whole new calculator!!! The
>processor could do color, but it'd slow it down. I'd recomend a MINIMUM of
16
>bit, and have plenty of RAM, maybe a megabyte.
>
>It would be possible to design a whole new calc (it's been brought up
before),
>but it'd take a lot of effort, and there is also the task of programmnig
the
>ROM (you'd most likely need to work from scratch).
>
>I'd love to see the 68020 or 68030 used, since they are cheap, and can run
a
>good 33MHz for sure (3D graphics anyone???). A strong arm processor would
be
>nice too, but the problems are countless. It takes MUCH effort to design
>something like this. Anyone up to programming a BASIC interpereter in ASM?
>that's not half of what needs to be done for the ROM!
>
>You'd still have the job of reprogramming the ROM for just a color screen
>upgrade. OUCH!!!
>
>I'm content to wait for TI to possibly come out with one someday.
>
>
>Richard Piotter
>richfile@prairie.lakes.com
>
>The Richfiles TI Hardware and BASIC web page:
>http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
>