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.
UIX! introduces a new feature—sound. The original PET did not have any sound capabilities, but some users built interfaces to connect the PET's CB2 line to an amplifier and create square wave sound output. Later PET models had an internal Piezo beeper.
The ! on the end of the filename signifies that the program has sound. CURSOR will follow this filename convention throughout its run.
In this game, you have to memorize a sequence of lights and tones—a bit like Simon but much more difficult. QUIX! presents a completely new sequence each turn so you can't rely on memorizing past turns to get ahead. As the game progresses, the patterns get successively longer and are presented more quickly, making this game a worthwhile challenge.