Routines
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29012: Make a walking sound effect (blue border)
Used by the routines at 21920, 28114, 28160, 28216, 29574, 62178, 62438, 64242 and 64259.
29012 PUSH BC
29013 LD A,1 The border will be blue
This entry point is used by the routine at 21419 with A=6 (yellow border).
29015 LD C,7 Initialise the sound effect duration counter
29017 XOR 16 Produce the sound effect
29019 OUT (254),A
29021 LD B,192
29023 DJNZ 29023
29025 DEC C
29026 JR NZ,29017
29028 POP BC
29029 RET
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