Checks blocks to see what to do whenever Samus is currently touching one (NOT when Samus runs into it)

JSR ($9B40),X (many places in bank 94)
X = block type*2

BlockType           Call
------------------|------
0 = Air           | 97D0
1 = Slope         | 97BF
2 = XRay Air      | 98CC
3 = Treadmill     | 9B16
4 = Shootable Air | 97D0
5 = H-Extend      | 9411
6 = Air???        | 97D0
7 = Bombable Air  | 97D0
8 = Solid         | 98DC
9 = Door          | 98DC
A = Spike         | 98DC
B = Crumble       | 98DC
C = Shot          | 98DC
D = V-Extend      | 9447
E = Grapple       | 98DC
F = Bomb block    | 98DC


9411 : Adjust horizontal position according to BTS and go to the pointed-to block's code
9447 : Adjust vertical position according to BTS and go to the pointed-to block's code

97D0 : Put #$9F55 into $0A6C (Set normal momentum indexes)
97BF : Check if the slope is a special case (0-5) or normal slope. Then do nothing.
98CC : JSR ($98AC,X), X = 2*BTS (expected 00 - 0F). 0 = CLC RTS, 1 = CLC RTS, 2 = do $10 damage to Samus as if an enemy hurt her, 3-F = RTS.
9B16 : If BTS is positive, JSR ($9966,X), X = 2*BTS. Else create a region-indexed PLM from 94:9A06,X, X = (2*BTS + 20*Region).
98DC : Put #$9F55 into $0A6C (Set normal momentum indexes)