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.
COURSE is a maze game: the PET throws a jumble of random PETSCII box fragments onto the screen and your goal is to manoeuvre around the obstacles that result—using the numeric keypad—and find a path from the home position to the bottom right corner of the screen. This one's a fun diversion for a little while but is not deep enough to provide much replay value.