Re: TI-H: Color LCD with ASM
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Re: TI-H: Color LCD with ASM
I've been thinking about that also. but i myself wouldnt test it until
someone else got it working and released schmatics since my ti86 is new
and i'm too good at that kinda stuff. i would like to see this happen
tho.
On Sat, 10 Jan 1998, Richard Piotter wrote:
>
> Hey! I had an idea. CASIO Color Graphing Calculators use a screen that
> is the same size (in pixels) as a TI-85/86 screen. If three pages of
> video data were used (EXACTLY like 8 shade grayscale), The TI might be
> able to generate color data. I don't know how similar the CASIO and TI
> LCD interfaces are, but I believe that in the TI-85, there are posibly
> 6 pins for the collumns and 9 for the rows, totaling 15, the number or
> wires connecting the Screen to the main board. There is a + and - wire,
> and that's it. I don't know if my guess is correct. All I know is that I
> melted one once and it had every 6th collumn all black. I'm guessing
> that there are at least 6 pins to drive the columns. Maybe the other 9
> are vert/horz sync, clock, contrast settings, activation or something
> else. All I know is that Someone must know how it works.
>
> If someone knew EXACTLY how it worked, that would be the first step. The
> second step is to see how the CASIO Color LCD takes data. If someone
> figured that out then the final step would be to interface them. If you
> cycled through all the colors, it would be a near black (I think). Off
> is white. There is Orangish Red, Green, and Blue. I'm not sure, but they
> may have one model that does cyan, magenta, and yellow (I know they have
> at least two models with color).
>
> I want to know how the two interface and create something that will go
> between. It might be possible to even display TI standard monochrome on
> it because the 3 pages it takes to update would be identical, resulting
> in black.
>
> I want to know what everyone thinks. I know many LCDs use similar
> interfaces. Maybe we could figure out TI and CASIO LCD interfaces and
> make a color TI! You can get a Casio color for $60, so for posibly under
> $200, we could have a full color TI. The programs could be done like 8
> shade grayscale and would simply be grayscale on non upgraded calcs!
>
> I want to try this, but I want information before I waste $60 on a
> CRAPIO. If I can't do It, I'll turn the Color screen into a jumbotron
> for my model railroad (football or baseball stadium. Not sure which yet!
> =).
>
> I want lots of info and feedback. Even if no one cares about color, I
> do, and I want to do it for myself too. I want others to know how, so
> please help me out on this! I'm willing to invest some time into this.
>
> I hope I get some help!
>
> Thanks!
>
> Richard Piotter
>
> richfiles1@hotmail.com
>
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