Controls:
arrows - movement
[alpha] - fire
[exe] - use (open the door,...)
[^] - iddqd + idkfa :-)
[F1] ~ [F5] - weapon select
[Menu] - exit (the calculator will be in somehow wrong state, if menu is not working, try to turn it off and on)

So, you use memset like this:
void * memset ( void * ptr, int value, size_t num );
Ptr will be a pointer to the screen, value the color, and num the number of pixel to change.

memset works with bytes, so you can use it to fill the screen, but only for few colors, where the lower byte equals the higher byte.
Black or white is OK, but brown (0x9A60) not, because 0x9A != 0x60.
Also the num is NOT number of pixels, but number of pixels * sizeof(unsigned short), because 1 pixel (= 1 unsigned short) == 2 bytes.

You may have array of images.
Then your main() could look like:
int main() {
  while(1) {
    int i;
    int key = PRGM_GetKey();
    if(key == KEY_PRGM_MENU) {  GetKey(&key); }
    for(i=0;i<NyanCatSize;i++)  {
       CopySprite(NyanCat[i], 0, 0, 160, 160);
       Bdisp_PutDisp_DD();
       Bdisp_AllCr_VRAM();
   }
  }
  return 0;
}Martin
BTW: It seems "NyanCat.h" is not in the archive :-(

Make videos compressed enough to destroy the image quality as much as possible to make any text impossible to read, but still look watchable. Example below (another idea is reducing resolution to 84x48 then scaling the videos back up):

Unfortunately I do not have monopoly to create video. Anyone can create video and I cannot unrelease already released cfgplayer2.
So if I decrease the output quality of the cgplayer2, anyone can downgrade to current version (or simply not upgrade from current version).
Source code is already available.

Can you connect with the USB cable?

No.
1. I do not know how to communicate on USB (do we know such syscalls ?)
2. The device (calculator) must emulate usb->serial convertor so linux machine will make console for it. This would probably require low level programming of USB controller on the calculator. Do you know how ? I do not :-(

BTW: the same way how to "forget" Base-N flag can be also used to "forget" password:-)

Question, in PRIZM ASM and C, is there something special preventing people to use or convincing them to not use the 2nd key (like with ON on the TI-84+)? I am asking this because I noticed that most PRIZM games use F1 as confirm key instead of the standard 2nd/Enter and it tends to be rather annoying when you are used a lot to pressing 2nd.

2nd/Enter is much more inconvenient than F1 or exe (because of 2 key presses :-) ) and also Casio uses F1 as confirm key very common (at least since fx7700GB)