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Minor APU clean ups

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This commit is contained in:
Lior Halphon 2021-09-02 01:29:38 +03:00
parent eefaac3d04
commit 0ca1ee6a35
1 changed files with 1 additions and 6 deletions
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7
Core/apu.c
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@ -1060,7 +1060,6 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
if (!(value & 4) && !(((gb->apu.square_channels[index].sample_countdown - 1) / 2) & 0x400)) {
gb->apu.square_channels[index].current_sample_index++;
gb->apu.square_channels[index].current_sample_index &= 0x7;
gb->apu.is_active[index] = true;
}
/* Todo: verify with the schematics what's going on in here */
else if (gb->apu.square_channels[index].sample_length == 0x7FF &&
@ -1171,7 +1170,7 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
case GB_IO_NR34:
gb->apu.wave_channel.sample_length &= 0xFF;
gb->apu.wave_channel.sample_length |= (value & 7) << 8;
if ((value & 0x80)) {
if ((value & 0x80) && gb->apu.wave_channel.enable) {
/* DMG bug: wave RAM gets corrupted if the channel is retriggerred 1 cycle before the APU
reads from it. */
if (!GB_is_cgb(gb) &&
@ -1233,10 +1232,6 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
}
}
gb->apu.wave_channel.length_enabled = value & 0x40;
if (gb->apu.is_active[GB_WAVE] && !gb->apu.wave_channel.enable) {
gb->apu.is_active[GB_WAVE] = false;
update_sample(gb, GB_WAVE, 0, 0);
}
break;