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9CC2: Increments score in proportion to current speed
Used by the routine at main_loop.
speed_score 9CC2 LD HL,($A24A) Fetch current speed into HL
This code makes little sense.
9CC5 LD A,L Speed low byte
9CC6 RR H Bottom bit of H moves to carry (H now unused)
9CC8 RLA Merge carry into LSB of speed (wrong end?)
9CC9 SRL A Divide by four
9CCD LD E,A Needless move
9CCE ADD A,$00 Add carry in, perhaps for rounding?
9CD0 DAA BCD correction
9CD1 LD DE,$0000 Zero high part of score increment
9CD4 JR increment_score Exit via increment_score
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