Changing the size of memory or changing the ROM version forces a reset of the PET.
The emulator has an IEEE-488 device at address 8. It can be used load and save (.prg) files.
Some programs don't run on ROM1 and some require more memory than the default 8K.
In FIRE!, you control a Fire Department helicopter dropping water on burning buildings. The PETSCII art in this one is effective, although the helicopter looks a little goofy. The gameplay is solid but the controls are a bit sluggish—I suppose that while you struggle to push the helicopter back and forth above the burning buildings, you can imagine that you're trying to fly in high winds.
This game is all about seizing the initiative. If you don't act quickly to contain the fire, it will spread rapidly and the entire screen will burn.