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.
EVEREST has you climbing up the side of a mountain of numbers, where higher numbers indicate a more difficult climb. Blizzards and avalanches complicate your ascent. I have managed to reach the summit, so I can confirm that it is possible, although some luck is required. With a little practice, you should be able to consistently score above 80 and earn the message YOUR CLIMBING WAS GREAT.