Game mode

The game mode is, in simplest terms, what the game is currently doing as its set of routines. For the context of this article, we will consider the game mode as the exact combination of 2 different addresses: $10 and $11, the main module and submodule, respectively. An in-depth understanding of these addresses is not necessary for No Major Glitches categories; however, understanding them at a basic level is helpful for routing and executing any transition-corrupting glitch.

Submodule

The submodule is where most of the magic of corruption happens. Fundamentally, all changes to the submodule are incrementations; i.e. nothing is directly set. For example, an overworld mirror transition is submode 0x23. If the mirror were used when the submode was already 0x01, then the result would be submode 0x24. In fact, this is exactly what happens during a mirror wrap.

Submodule values

Main module		0x07 (Underworld)
Value	Process	Corruptable?	Corrupted from	Notes
0x00	Default state; player in control	No
0x01	Subtile transition	Yes
0x02	Supertile transition	Yes	West subtile somarias
0x03	Star tile hit	No	Somaria Door	See: Overlay corruption
0x04	Unlocking key door	No	West supertile somarias
0x05	Shutter doors opening/closing	No		Not corruptable, but see § Non-increment corruptions
0x06	???	No
0x07	Pit transition	No
0x08	Auto stairs that go up south to north	No
0x09	Cracked wall opening	No
0x0A	Torch-induced brightening	No
0x0B	Water drain	No
0x0C	Water Flood	No
0x0D	Flood gates	No
0x0E	Spiral staircase transition	No
0x0F	Entrance transition	No
0x10	Auto stairs that go up north to south	No
0x11	???
0x12	Up straight staircase	No
0x13	Down straight staircase	No
0x14	Damaging pit scroll	No
0x15	Telepad	Partially*
0x16	Peg switch	No
0x17	Pressure plate	No
0x18	Crystal fanfare	No
0x19	Mirror transition	Yes
0x1A	Triforce door	No	Subtile Mirror Door

* Telepads can be corrupted only with a YBA, but doing so results in a game crash

Non-increment corruptions

LSD Blind

LSD Blind with both effects

By pressing select, drinking a potion, or opening the map as Blind enters the light in her room, the game may enter submodule 0x05 of main module 0x0E. This will create one or both of the iris wipe used by the Desert prayer and a mesh of vibrant colors replacing most of the game's palettes. The latter only appears to occur on certain frames with the select menu, and it is where the name of this glitch comes from. Using the mirror will begin the mosaic effect, leaving the screen in that filter when it is interrupted. This is caused by the door of the room attempting to close, which sets the submodule directly to 0x05. Since the main/sub module combination of 0x0705 never occurs, this leaves that door open.

Jingle Glitch

Main article: Jingle glitch

When stairs are used at the same time that shutter doors open or close, the submodule takes on its value of 0x05 directly. The actual execution of most scripts behaves as normal here, but this change does interrupt some data transfer and coordinate functions, leading to the sprite offset and some data spoofing.