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--== audio decisions ==--
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--== audio decisions ==--
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(YM2149)
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voltage on outputs (loaded as per rev.C)
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2.26v min, 3.40v max => 1.14 Vp-p (max 1.35Vp-p by datasheet)
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1.5*1.14 Vp-p (A/C + half B) to 2.0 Vp-p is K=1.17;
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(AY8910)
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Per datasheet, max 2mA current per output, 2 Vp-p @ 1k
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(PT2258 related)
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(PT2258 related)
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1. Use PT2258 to control volume:
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1. Use PT2258 to control volume:
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  1 channel for AY/YM
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  1 channel for AY/YM