Routines
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25088: Make a sound effect
Used by the routines at 26352 (to make the sound effect of Sam being shot) and 28646 (to make the sound effect of a sniper firing).
Input
A Initial border colour
D Pitch adjustment
E Initial pitch
25088 ADD A,17 Flip bit 4 of A and increment the border colour in bits 0-2
25090 AND 23 Retain only bits 0-2 and 4
25092 OUT (254),A Change the border colour and speaker state
25094 LD B,E Perform the pitch delay
25095 DJNZ 25095
25097 LD B,A Save A briefly
25098 LD A,E Adjust the pitch delay for the next pass
25099 ADD A,D
25100 LD E,A
25101 LD A,B Restore A
25102 JR NZ,25088 Jump back unless the pitch delay is now 0
25104 RET
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