bwang, that was the problem.  I had SCREEN_BYTES_SIZE+bytesOffset, which probably made it larger that it could handle.  Thank you so much for your help, I feel so stupid when it is a simple error like this. You might want to modify the utils.h/.c header to include functions for scrolling the screen up and down.  Here are my (hopefully working ) modified versions:


void scrollScreenDown(char* scrbuf, char* tmpbuf, int lines)
{
  int bytesOffset = 160 * lines;
  int cpysize = SCREEN_BYTES_SIZE - bytesOffset;
  memcpy(tmpbuf, scrbuf - bytesOffset, cpysize);
  memcpy(scrbuf, tmpbuf, cpysize);
  memset(scrbuf + cpysize, 0xFF, bytesOffset);
}

void scrollScreenUp(char* scrbuf, char* tmpbuf, int lines)
{
  int bytesOffset = 160 * lines;
  int cpysize = SCREEN_BYTES_SIZE - bytesOffset;
  memcpy(tmpbuf, scrbuf + bytesOffset, cpysize);
  memcpy(scrbuf, tmpbuf, cpysize);
  memset(scrbuf + cpysize, 0xFF, bytesOffset);
}

[\code]

Glad it's working. I wish you good luck in your projects, if any (Starcraft Nspire... j/k )

How do you convert an integer to a string? I wanted to display the score in a dialog box upon exiting my game.

Also, the documentation is almost complete for utils.h, except for fade, scrollscreen, and WAIT. What do all the arguments do in these functions?

Unfortunately, sprintf hasn't been written yet. There was another, simpler function, itoa, but it depends on this standard library function.

sprintf is part of the OS (at least it's defined in os.h).

scrollScreen() arguments:
scrollScreen(char* scrbuf, char* tmpbuf, int lines)
Scroll the screen buffer scrbuf up lines rows. tmpbuf is a temporary buffer of the same size as scrbuf used by the routine internally.

I updated the first post with a better graphics.h.

Fixed in the first post Thanks for the bugfix!
Can someone verify whether the Linux and Windows versions of the tools can coexist in the same directory? That way I can merge the two skeletons.