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.
MIND is a solid version of the code-breaking guessing game Mastermind. The complexity of the controls laid out in the instructions had me concerned at first, but the multiple input schemes work quite well. You can enter your guesses using the first letter of each colour.