alpha68k_n: correct audio clock for sstingry #9382
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According to video by PCB (https://youtu.be/dA2lsgwdrU0?t=6222), audio clocks need to be corrected.
cuavas
reviewed
Mar 9, 2022
src/mame/drivers/alpha68k_n.cpp
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| /* sound hardware */ | ||
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| ym2203_device &ym1(YM2203(config, "ym1", 3000000)); | ||
| ym1.add_route(ALL_OUTPUTS, "speaker", 0.30); | ||
| // sound hardware | ||
| ym2203_device &ym(YM2203(config, "ym", 2000000)); // Verified from video by PCB, 24MHz/12? | ||
| ym.add_route(ALL_OUTPUTS, "speaker", 0.30); | ||
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| ym2203_device &ym2(YM2203(config, "ym2", 3000000)); | ||
| ym2.add_route(ALL_OUTPUTS, "speaker", 0.30); | ||
| ay8910_device &aysnd1(AY8910(config, "aysnd1", 2000000)); // Verified from video by PCB, 24MHz/12? | ||
| aysnd1.add_route(ALL_OUTPUTS, "speaker", 0.30); | ||
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| ym2203_device &ym3(YM2203(config, "ym3", 3000000)); | ||
| ym3.add_route(ALL_OUTPUTS, "speaker", 0.45); | ||
| ay8910_device &aysnd2(AY8910(config, "aysnd2", 2000000)); // Verified from video by PCB, 24MHz/12? | ||
| aysnd2.add_route(ALL_OUTPUTS, "speaker", 0.45); |
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Please use digit grouping so it’s easy to see order of magnitude at a glance without having to count the zeroes.
I changed sound chips according to photos of PCB shown below. sstingray: from past auction kyros: from blog of former developer of alpha denshi |
wilbertpol
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Apr 22, 2022
Changed sstingry audio clocks to match recording from PCB. Also changed second and third sound chips for sstingray and kyros to AY-3-8910 based on PCB photos.
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According to video by PCB, audio clocks need to be corrected.
Also, former 2nd and 3rd YM2203 are actually AY-3-8910s.