Legend of Zelda: Controls

Game Information » Boss Guide, Characters, Controls, Items & Equipment, Story
Information » Codes, Game Genie Codes
Media » Dungeon Maps, Screen Shots

D-Pad - Used to input letters when registering
Select - Changes the Heart Selector between game files, registering a name, and Elimination mode.
Start - Confirms your selection.
B - Moves the cursor backwards.
A - Inputs letters.

D-Pad - Character Movement.
Select - Cast the magic spell selected on your menu screen.
Start - Pauses/Unpauses the game, freezing all on-screen movement.
B - Selected item will be used.
A - Swings your sword.

These controls should work with any official Nintendo Entertainment System controller