[Oslib-devel] ABORT 64 and time

[Giacomo G. <gi...@ga...>]

Hi all

ok, I underestimate the video scroll function... it takes 1900 us sec on 
a P3 celeron.
So the ABORT 64 error with system TICK of 1000 it's normal... anyway
with one shot mode it shouldn't happen. I suggest to change the ll_timer 
to skip
the abort test in case of one shot.

I modified also the scroll function:

void _scroll(char attr,int x1,int y1,int x2,int y2)
{
    register int x,y;
    WORD xattr = attr << 8,w;
    LIN_ADDR v = (LIN_ADDR)(0xB8000 + active_page*(2*PAGE_SIZE));
     
    for (y = y1+1; y <= y2; y++)
       for (x = x1; x <= x2; x++) {
       w = lmempeekw((LIN_ADDR)(v + 2*(y*cons_columns+x)));
       lmempokew((LIN_ADDR)(v + 2*((y-1)*cons_columns+x)),w);
    }
    for (x = x1; x <= x2; x++)
       lmempokew((LIN_ADDR)(v + 2*((y-1)*cons_columns+x)),xattr);
}

//#define OPTIMIZED
#ifdef OPTIMIZED

void scroll(void)
{

  int x;
  WORD xattr = bios_attr << 8;
  LIN_ADDR v = (LIN_ADDR)(0xB8000 + active_page*(2*PAGE_SIZE));

  memcpy((LIN_ADDR)(v),
         (LIN_ADDR)(v + 2*cons_columns),
         cons_columns*(cons_rows-1)*2);

  for (x = 0; x <= cons_columns-1; x++)
      lmempokew((LIN_ADDR)(v + 2*((cons_rows-1)*cons_columns+x)),xattr);

}

#else

void scroll(void)
{
    _scroll(bios_attr,0,0,(cons_columns-1),(cons_rows-1));
}

#endif

with the optimized one I got 1200 us instead of 1900... not much but 
it's called many times.

Regards

Giacomo