Turn Block Bridge

From SMWiki

Super Mario World Sprite
Turn Block Bridge
Sprite number(s)	59 (horizontal & vertical version) 5A (horizontal version)
Type	Normal sprite
GFX file(s)	GFX00 (SP1)
Palette(s)	8

A Turn Block Bridge is a sprite made up of 5 Turn blocks that expands and retracts. Unlike a Turn Block, a Turn Block Bridge does not flip if hit from below.
There are two versions, one that expands and retracts horizontally, and another that expands and retracts horizontally and vertically.
Please keep in mind that other sprites will fall through the turn block bridge.

Sprite info

The horizontal version is Standard Sprite #5A
The horizontal and vertical version is Standard Sprite #59.

Glitches

The last turn block on the bridge is flipped, as seen in the picture. To fix this, open Super Mario World in a Hex editor, and go to PC address 0B99D and change '60', to '20'.

If Mario hits a ceiling, turnblock, and spin jumps of an enemy at the same time, he will be forced downwards. This can push Mario through walls.

Related ROM Addresses

0B89F $01:B69F 2 bytes Misc. Length of Turn Block Bridge (sprites 59 and 5A)
0B8A1 $01:B6A1 2 bytes Misc. X offset of Turn Block Bridge (sprites 59 and 5A)
0B8A3 $01:B6A3 2 bytes Misc. Time of Turn Block Bridge (sprites 59 and 5A)
0B97E $01:B77E 1 byte Sprite tilemap related Tile used by Turn Block Bridge (sprites 59 and 5A)
0B99D $01:B79D 1 byte Sprite tilemap related Change [60] to [20] to prevent the last tile from the Turn Block Bridge from being X-flipped.