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SMW Memory Map
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ROM Address Length Type Description Details
$02887D 36 bytes Subroutine (JSL) Seems to be a subroutine for spawning stuff from blocks. What is spawned depends on the value of $05:

00 - nothing
01 - mushroom
02 - flower
03 - star
04 - cape
05 - 1-Up
06 - coin
07 - coin (sets multiple-coin-block timer)
08 - growing vine
09 - nothing?
0A - P-switch (blue/gray depending on block X position)
0B - key/wings/balloon/shell (depending on block X position)
0C - green Yoshi egg
0D - green Koopa shell (with stun timer set)
0E - changing item
0F - directional coins
10 - key (but a random blue shell-less Koopa also pops out)
11-FF - completely glitchy; best not to use

This subroutine can be used properly in a block, but the data bank must be 02 and the lower nybbles of $98 and $9A must be cleared. All values except 06 and 07 JSR to the main "spawn sprite from block" routine at $0288DC; values 06 and 07 JSR to the coin-spawning routine at $028A66.
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