Re: [cc65] Interrupt <-> C runtime environment

Hello,


On 2011-07-10 02:11, Ullrich von Bassewitz wrote:
> Hi!
>
> On Fri, Jul 08, 2011 at 11:19:30PM +0200, marcas wrote:
>> Which memory adresses do I have to save to restore the state before
>> the interrupt?
> See the faq: http://wiki.cc65.org/doku.php?id=cc65:interrupt_handlers_in_c
>
> The answer points to example code in the source package.
>
Well, I should read the FAQ first before posting.... thanks for the 
hint, I did not think about that.

>> P.S.: Rectangle of TGI needs optimization :-)
> What do you mean? tgi_bar?
>


Yes, tgi_bar.

I mentioned it because i want do draw a Sierpinski carbet.
Well this code  also need some optimization :-). But The most
time is required to draw the filled rectangles I think (beside the high 
stack processing due to recursion).

void DoSierpinskiCarpet(uint16_t x0L, uint8_t y0L, uint16_t width, 
uint8_t hight)
{
     uint8_t k,b,h;

     if (width>2 && hight>2)
     {
         b = width/3;
         h = hight/3;
         tgi_bar (x0L+b, y0L+h,x0L+2*b, y0L+2*h);

         for (k=0; k<9; k++) if (k!=4)
             DoSierpinskiCarpet (x0L+(k/3)*b, y0L+(k%3)*h, b, h); // 
Rekursion
     }
}



  I had a look at c64-320-200-2.s and i think it is also mentioned in 
the source comments.
I think it could be optimized by at least replacing the jsr to tgi_line 
in any way. I am currently also do some brainstorming
to get a faster solution for drawing filled and unfilled non rotated 
rectangles with VIC... As soon as I got a solution I will post it.

Kind regards marcas
> Regards
>
>
>          Uz
>
>

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