Routines
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C3AA: The bump: a warble as something walks into a wall
Used by the routines at MONSTER112_UPDATE and UPDATE_TOP.
Sixteen single waves whose half-wave count is scrambled from the step count, (C XOR $A5) + C: the same routine as Pentagram's jump warble. Only if the record was drawn last turn (the flag is left for the caller): a monster of 112-127 meeting a wall (MONSTER112_UPDATE), and the knight (UPDATE_TOP).
Input
IX the record
BUMP_SOUND C3AA BIT 1,(IX+$07) not on the screen: silent
C3AE RET Z
C3AF LD C,$10 for C = 16 down to 1: one wave at (C XOR $A5) + C
BUMP_SOUND_0 C3B1 LD A,C
C3B2 XOR $A5
C3B4 ADD A,C
C3B5 LD B,A
C3B6 CALL CLICK
C3B9 DEC C
C3BA JR NZ,BUMP_SOUND_0
C3BC RET
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