Re: A86: _textShadow help
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Re: A86: _textShadow help
Yep. But it's far easier and cleaner to use ram page 1, as then you don't
have to worry about text overwriting you vars (have to clear/set the right
flag) or clearing the graph screen. Use memory between $8100 and $bf00
without problems. You can actually go beyond that, as I've used from $8000
all the way up to almost $bfff without ill effects, but just to be safe,
leave a little room for those OP stacks and stuff. I don't know how well it
worked with shells, as I sort of gave up on that game after it grew past the
paltry 24k of work ram the calc has.
> > I believe that the text shadow is the area where the calculator stores
what
> > is currently displayed on the Home Screen. Since we write directly to
the
> > video ram in ASM, we don't need the Text Shadow so we can use it for
other
> > things like storing data.
> >
>
> 168 bytes I believe.
> make sure you clear it out with _clrScrn when you leave your prog, else
you
> might get garbage on the screen.
>
> >
> > You could also use another area called _plotSScreen which has the same
> > number of bytes (1048)
>
> 1024 bytes actually.
>
> > as the video ram. This is where the calculator stores
> > what is displayed on the graph screen if you don't happen to be looking
at it
> > at the moment. If you use grayscale, this is your second viewing
plane., but
> > if not, you can use it to store data.
References: