OAM table - handles all sprite tiles that are on screen. Order is xxxxxxxx yyyyyyyy tttttttt yxppccct. If the slot is free, then the Y position is #$F0.
$7E:0310-$7E:0313 is for the player's upper half, $7E:0314-$7E:0317 for the player's lower half, and $7E:0318-$7E:031B is for the player's hand. Various tiles are documented here. Note that $7E:0400-$7E:041F handles high bit of X position and tile size. It is not usable, since it is overwritten each frame and pretty painful to work with. Use $7E:0420-$7E:049F instead.