[A83] Re: Partial FastCopy
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[A83] Re: Partial FastCopy
I have a modded fastcopy routine that i wrote that displays part of the
screen. I'll send it if you want.
- - Joe
joe@joepnet.com
>
> You probably don't want to modify fastcopy to do this... joe wrote it so
> that it displayed columns each iteration through the loop.
>
> brandon sterner
>
> ----- Original Message -----
> From: <crono@ifrance.com>
> To: <assembly-83@lists.ticalc.org>
> Sent: Monday, July 22, 2002 8:26 AM
> Subject: [A83] Partial FastCopy
>
>
> >
> > I want to write a routine based on IonFastCopy, than refleshes only
> > the first X lines of the screen, but I don't fully undrestand how does
> > work the port 10 :
> >
> > To point to the highest line of the screen, we have to do :
> > ld a,80h ; 80h=128d=%10000000
> > out (10),a
> > And to point to the leftmost column, we have to do:
> > ld a,20h ; 20h=32h=%00100000
> > out (1O),a
> >
> > So after doing these 2 commands, the port 10 is set like that:
> > %10100000
> > Right ?
> >
> > Now I begin to doubt :
> > because, by default, the LCD driver is in X-increment mode, after each
> > writing throught the port 11, the X-coordinate (that is in fact the #
> > of the row !?) is increased, right ?
> >
> > It means that the port 10 is like that :
> > %10100001
> > then:
> > %10100010
> > etc.
> >
> > ... I'm lost !
> >
> > So, can somebody explain this to me, and how can I modify the FastCopy
> > routine in order to refresh only the first X lines of the screen ?
> >
> >
> >
> >
>
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