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Fixed APU bug that prevented some games from working

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This commit is contained in:
Lior Halphon 2016-09-10 02:20:44 +03:00
parent ad604036a5
commit 6d836b9f48
1 changed files with 2 additions and 1 deletions
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3
Core/apu.c
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@ -345,7 +345,7 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
case GB_IO_NR24:
case GB_IO_NR34:
gb->apu.wave_channels[channel].stop_on_length = value & 0x40;
if (value & 0x80) {
if ((value & 0x80) && (channel != 2 || gb->apu.wave_enable)) {
gb->apu.wave_channels[channel].is_playing = true;
gb->apu.wave_channels[channel].phase = 0;
gb->apu.wave_channels[channel].amplitude = gb->apu.wave_channels[channel].start_amplitude;
@ -360,6 +360,7 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
break;
case GB_IO_NR30:
gb->apu.wave_enable = value & 0x80;
gb->apu.wave_channels[2].is_playing &= gb->apu.wave_enable;
break;
case GB_IO_NR31:
gb->apu.wave_channels[2].sound_length = (256 - value) / 256.0;