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.
Numpad
1 2 3 - slow movement
4 5 6 - fast movement
modified version 3.1 (smaller bricks)
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only press NUMPAD keys 1-6 (any others will break program)
Bug Fixed by David Mrotek