Routines
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E3EC: Generate one wave cycle in a sound effect
Used by the routine at E3D3.
Input
B pitch
E3EC LD A,$10 Switch the speaker on.
E3EE OUT ($FE),A
E3F0 PUSH BC Remember the pitch value.
E3F1 DJNZ $E3F1 Wait a while with the speaker switched on, to generate part of a sound wave.
E3F3 POP BC Restore the pitch value.
E3F4 LD A,$00 Switch the speaker off.
E3F6 OUT ($FE),A
E3F8 PUSH BC Remember the pitch value.
E3F9 DJNZ $E3F9 Wait a while with the speaker switched on, to generate part of a sound wave.
E3FB POP BC Restore the pitch value and return.
E3FC RET
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