If the previous subtraction produced negative results, bit 0 of STATUS is set (to 1). Then you check this condition and if true, set Volume to 0.
By the way which chip are you controlling?
Ioannis
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Re: limiting to "no less than" zero
If the previous subtraction produced negative results, bit 0 of STATUS is set (to 1). Then you check this condition and if true, set Volume to 0.
By the way which chip are you controlling?
Ioannis
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