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Chapter 15. Games
•
The orange ghost's name changed from Clyde to Sue. (Sue
would later become a purple female ghost in Pac-Land, appearing
alongside Clyde.)
•
The three intermissions have changed to follow the developing
relationship between Pac-Man and Ms. Pac-Man (from when they
first meet to having a stork drop off their baby).
Like Pac-Man, Ms. Pac-Man has a bug in the fruit-drawing routine, which
renders the 256th board unplayable. While it may be possible to reach
the 256th board using the “rack test” cheat available as a DIP switch
(usable through MAME or other arcade emulator), the actual arcade
hardware will crash at or around the 134th board. At this point in the
game, a bug in the code causes invalid data tables to be used for a
subroutine which is supposed to draw invisible characters which slow
down the ghosts in the tunnels[1]. On level 142, a similar bug causes
a corrupt value to be loaded into the pointer to the maze data, causing
the screen to turn black. Although the ghosts and Ms. Pac-Man are still
visible, the game becomes unplayable.
MS. PAC-MAN – DEMO
