Re: A83: Color
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Re: A83: Color
All the opamp power will do, as far as I can ascertain, is change the power
(hence darkness of lcd) (its probably better to keep it at a lower setting)
... as for color, I obtained none from changing the op amp power. Nor could
I get the test to do anything (if it was supposed to)
-Dan
----- Original Message -----
From: <oh@hem.passagen.se>
To: <assembly-83@lists.ticalc.org>
Sent: Tuesday, December 29, 1998 1:43 AM
Subject: Re: A83: Color
>
>Try changeing the op-amp power control registers of the lcd driver chip, If
>I dont remember wrong, this is what makes the lcd go crazy..
>try also to enter test mode..
>this is done by writeing this to the lcd control port:
>
>test mode: a value between $18 and $1F (doesnt matter which)
>op-amp 1: a value between $10 and $13 (different levels I assume..)
>op-amp 2: a value between $08 and $0C ( - " - )
>
>Thats about what you can do with the lcd controller exept the usual stuff
>and hardware Y-scroll..
>try it.. I'm sorry I can't.. (no 83 anylonger you know..)
>A warning though.. I don't know how good it is for your LCD to fiddle with
>this.. don't sue me if your lcd breaks..
>
>//Olle
>
>
>
>At 00:35 1998-12-29 EST, you wrote:
>>Ha, I originally asked the color question, I'm glad that I at least have
some
>>support now :) So anyway, in talking about those crashes, my calculator
>>recently crashed where I had a solid, undoubtedly blue line about 3/4 of
the
>>way down the screen. The only thing that worked on the calculator was
>turning
>>it on and off. When you turned it on, the blue line would immediately
>>apperar. When you turned it off, it would slowly fade away over about 2
>>seconds. The weird part is that it disappeared from the center out. It
>would
>>disappear to something that looked like the outlines of the pixels, so the
>>horizontal line turned into a bunch of unfilled, outlined, blue squares.
I
>>didn't think the screen is capable of doing anything less than a pixel.
But
>>anyway, I impressed a bunch of people at school with this. So obviously
the
>>color isn't a miracle because of all the occurrences with crashes. It
seems
>>like there'd surely be some way to control this.
>>-Jared
>>http://members.aol.com/jared173/calc/tivault.htm
>>
>>Oh yeah, and don't yell at me if the outlines of the pixels are completely
>>impossible, I had a lot of people verify it, though.
>>
>>
>>
>>
>><< >
>> >At 22:15 1998-12-28 -0500, you wrote:
>> >> I was amazed. The End. (Oh and
then
>> I
>> >>was pissed cause my program crashed...) Anyways you get the idea,
some
>> >>type of color is possible, but I dunno how... -Dan
>> >
>> >What you did, was that you accidently changed some control values in the
>> >lcd controller.. I have seen this for myself..
>> >there is unfortunatly no way to control this though.. or to make
anything
>> >but horisontal lines.. so it is unfortunatly not very useful.. if you
>> >looked closely on that line, you would probably se that it was solid
to..
>> >not divided into pixels.. (if I don't remember wrong.. I don't own an
83
>> >anylonger.. in fact.. I never did :) I just borrowed it)
>> >
>> >//Olle
>> >>
>>
>>