Nice! How comprehensive is it? Can it handle arbitrary symbolics, or only special expressions involving pi, e, and square roots?
I wrote something like this a year back (it expanded symbolic expressions and did rational integration and such), but it was deadly slow and I dropped it after Ndless came out.

Fixed code:
#include <os.h>
//notice the quotes around utils.h
#include "utils.h"

asm(".string \"PRG\"\n");

int main()
{
  int antx = 160;
  int anty = 120;
  int dir = 1;

  while (!isKeyPressed(KEY_NSPIRE_ESC)) {
    if (getPixel(antx,anty) == 15) {
      setPixel(anty,antx,0);
      dir = dir - 1;
      }
    else {
      setPixel(anty,antx,15);
      dir = dir + 1;
      }
    if (dir == 0)
      dir = 4;
    else if (dir == 5)
      dir = 1;
    if (dir == 1)
      antx = antx - 1;
    else if (dir == 2)
      anty = anty + 1;
    else if (dir == 3)
      antx = antx + 1;
    else
      anty = anty - 1;
    if (antx == 0)
      antx = 320;
    else if (antx == 321)
      antx = 1;
    if (anty == 0)
      anty = 240;
    else if (anty ==  241)
      anty = 1;
   }
   return 0;
}
I also updated skeleton.zip to use willrandship's common.h, as well as some other minor changes.

DJ, did you put them in a folder called bmpviewer? The pictures and the program need to be in the same directory.

I was experimenting with bitmap file loading today, and the program has reached a semi-usable state, so here it is.
It has no file browsing, so to use it, you will need a 24-bit bmp file with dimensions less than 320x240, renamed to
test.tns and placed in a folder called bmpviewer on the Nspire. It has only been tested with bitmaps produced by the GIMP.
Hopefully I will figure out how to add more features (like browsing) in the future.
Enjoy!

Gasp! I'm featured!

Hmmm...its been a week since I posted that. Anyone?

That document seems to be for an entire development board, not just the processor.