Routines
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B80F: Fire moving north-south (types 180 and 181)
The fire_ns block (
fire_ns
). The same as
upd_86_87
along Y, with bit 1 of +13 as the direction, 1 for +Y.
upd_180_181
B80F
CALL
upd_12_to_15
pixel offsets; no gravity
B812
LD (IX+$0B),$01
B816
BIT 1,(IX+$0D)
dY = +2 or -2 from bit 1 of +13
B81A
LD A,$02
B81C
JR NZ,
fire_ns_move
B81E
NEG
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