Nintendo NES-001 User Guide - Page 30

Game Genie

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Figure 4-6. Mario Golf disk [41]. 4.3 Game Genie The Game Genie was a device that allowed gamers to cheat by adjusting the way the code is executed. The Game Genie was designed by Codemasters and distributed by Galoob Toys [14]. Other cheat devices worked by locking the value of a given memory location. For example if the game stores the number of lives remaining in location $1000, then locking this to 5 would give the gamer an infinite number of lives. The Game Genie, however, works on ROM rather than RAM. It monitors the address bus of the cartridge port and if it detects a given address writes the required value to the data bus [5]. Figure 4-7. Game Genie [42]. 30

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Figure 4-6. Mario Golf disk [41].
4.3 Game Genie
The Game Genie was a device that allowed
gamers to cheat by adjusting the way the code
is executed. The Game Genie was designed
by Codemasters and distributed by Galoob
Toys [14]. Other cheat devices worked by
locking the value of a given memory location.
For example if the game stores the number of
lives remaining in location $1000, then locking
this to 5 would give the gamer an infinite
number of lives. The Game Genie, however,
works on ROM rather than RAM. It monitors
the address bus of the cartridge port and if it
detects a given address writes the required
value to the data bus [5].
Figure 4-7. Game Genie [42].