Re: A89: Re: help?
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Re: A89: Re: help?
> >Because of the way the LCD hardware is wired on HW2. What you see on the
> screen
> >is actually not what's in the LCD memory, but in a buffer. Whenever you
> write to
> >the LCD memory whatever was there before gets bumped to the buffer, which
> the
> >LCD displays. It works like a double-buffer, actually. So to get the GFX
> >displayed directly when you don't constantly update the screen you have to
> >"write it twice", or copy it to itself.
>
> Niklas, I thought that this was only applicable if you change the screen
> memory (page) location, and we can't get that port to work. I'm under the
> impression that every byte is updated as soon as you right to it, but if you
> change the screen page without writing to the screen, THEN the screen will
> not update. Only then do you have to copy the screen to itself. . .
Maybe... I'm not in a position to test this as I don't have any access to HW2 at
all :(
I got my information from Paul via you and A89 :)
/ Niklas Brunlid
Check out Prosit for the TI-89 / TI-92+ at http://prosit.ticalc.org
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said "You look as if you need a Screaming Orgasm". At the time this was the
last thing on my mind...
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