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.
WEATHER is a simple BASIC program that asks the user for two recent barometric readings along with the current wind speed, cloud cover, and temperature. From this data, the program attempts to come up with a short-range forecast. CURSOR makes absolutely no claims that it is accurate or correct, so I'm guessing they wouldn't recommend you use this program when planning a picnic. You'll likely have to do a bit of unit conversion: instead of the metric kiloPascals (kPa), the program expects barometric pressure to be measured in inches of mercury (inHg).