EXAMPLE PROGRAM 7:

 10 S=54272
 20 FORL=0TO24:POKES+L,0:NEXT
 30 POKES+14,5
 40 POKES+18,16
 50 POKES+3,1
 60 POKES+24,143
 70 POKES+6,240
 80 POKES+4,65
 90 FR=5389
 100 FORT=1TO200
 110 FQ=FR+PEEK(S+27)*3.5
 120 HF=INT(FQ/256):LF=FQ-HF*256
 130 POKES+0,LF:POKES+1,HF
 140 NEXT
 150 POKES+24,0

LINE-BY-LINE EXPLANATION OF EXAMPLE PROGRAM 7:

Line(s)	Description
10	Set S to start of sound chip.
20	Clear sound chip registers.
30	Set low frequency of voice 3.
40	Set triangular waveform voice 3.
50	Set high pulse width for voice 1.
60	Set volume 15, turn off audio output of voice 3.
70	Set Sustain/Release for voice I (S=15, R=0).
80	POKE start pulse waveform control voice 1.
90	Set lowest frequency for siren.
100	Begin timing loop.
110	Get new frequency using output of oscillator 3.
120	Get high and low frequencies.
130	POKE high.and low frequencies for voice 1.
140	End timing loop.
150	Turn off volume.

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This page has been created by Sami Rautiainen.
Read the small print.	Last updated February 10, 2002.