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Merge pull request #453 from grauw/scc-reset-period-counter

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Reset period counter when writing to period registers.
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tildearrow 2022-05-22 22:49:03 -05:00 • committed by GitHub
commit 3d4f2cfa13
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3 changed files with 12 additions and 3 deletions
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2
src/engine/platform/sound/scc/scc.cpp
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@ -454,6 +454,7 @@ void scc_core::freq_vol_enable_w(u8 address, u8 data)
if (m_test.resetpos) // Reset address
m_voice[voice_freq].addr = 0;
m_voice[voice_freq].pitch = (m_voice[voice_freq].pitch & ~0x0ff) | data;
m_voice[voice_freq].counter = m_voice[voice_freq].pitch;
break;
case 0x1: // 0x*1 Voice 0 Pitch MSB
case 0x3: // 0x*3 Voice 1 Pitch MSB
@ -463,6 +464,7 @@ void scc_core::freq_vol_enable_w(u8 address, u8 data)
if (m_test.resetpos) // Reset address
m_voice[voice_freq].addr = 0;
m_voice[voice_freq].pitch = (m_voice[voice_freq].pitch & ~0xf00) | (u16(bitfield(data, 0, 4)) << 8);
m_voice[voice_freq].counter = m_voice[voice_freq].pitch;
break;
case 0xa: // 0x*a Voice 0 Volume
case 0xb: // 0x*b Voice 1 Volume