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.
FBALL is a menu-based (American) football simulator. You choose your offensive and defensive plays from a numbered list, but it's not obvious how the program evaluates your choices and determines the appropriate yardage. The game would be improved by some additional visuals but when I stopped the program and checked available RAM with PRINT FRE(0) there were only 139 bytes left unused! The PETSCII playing field is well drawn. Someone who was really into football might have enjoyed playing with this program in 1979.