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More square zombie step quirks

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This commit is contained in:
Lior Halphon 2022-03-12 14:32:16 +02:00
parent d713ba85c7
commit ef15c9b160
1 changed files with 13 additions and 1 deletions
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14
Core/apu.c
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@ -816,6 +816,8 @@ void GB_apu_init(GB_gameboy_t *gb)
gb->apu.skip_div_event = GB_SKIP_DIV_EVENT_SKIP;
gb->apu.div_divider = 1;
}
gb->apu.square_channels[GB_SQUARE_1].sample_countdown = -1;
gb->apu.square_channels[GB_SQUARE_2].sample_countdown = -1;
}
uint8_t GB_apu_read(GB_gameboy_t *gb, uint8_t reg)
@ -1125,11 +1127,20 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
gb->apu.square_channels[index].envelope_clock.locked = false;
gb->apu.square_channels[index].envelope_clock.clock = false;
gb->apu.square_channels[index].did_tick = false;
bool force_unsurpressed = false;
if (!gb->apu.is_active[index]) {
if (gb->model == GB_MODEL_CGB_E || gb->model == GB_MODEL_CGB_D) {
if (!(value & 4) && !(((gb->apu.square_channels[index].sample_countdown - gb->apu.square_channels[index].delay) / 2) & 0x400)) {
gb->apu.square_channels[index].current_sample_index++;
gb->apu.square_channels[index].current_sample_index &= 0x7;
force_unsurpressed = true;
}
}
gb->apu.square_channels[index].delay = 6 - gb->apu.lf_div;
gb->apu.square_channels[index].sample_countdown = (gb->apu.square_channels[index].sample_length ^ 0x7FF) * 2 + gb->apu.square_channels[index].delay;
if (gb->model <= GB_MODEL_CGB_C && gb->apu.lf_div) {
gb->apu.square_channels[index].sample_countdown += 2;
gb->apu.square_channels[index].delay += 2;
}
}
else {
@ -1152,6 +1163,7 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
gb->apu.square_channels[index].sample_countdown = (gb->apu.square_channels[index].sample_length ^ 0x7FF) * 2 + gb->apu.square_channels[index].delay;
if (gb->model <= GB_MODEL_CGB_C && gb->apu.lf_div) {
gb->apu.square_channels[index].sample_countdown += 2;
gb->apu.square_channels[index].delay += 2;
}
}
gb->apu.square_channels[index].current_volume = gb->io_registers[index == GB_SQUARE_1 ? GB_IO_NR12 : GB_IO_NR22] >> 4;
@ -1167,7 +1179,7 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
if ((gb->io_registers[index == GB_SQUARE_1 ? GB_IO_NR12 : GB_IO_NR22] & 0xF8) != 0 && !gb->apu.is_active[index]) {
gb->apu.is_active[index] = true;
update_sample(gb, index, 0, 0);
gb->apu.square_channels[index].sample_surpressed = true;
gb->apu.square_channels[index].sample_surpressed = true && !force_unsurpressed;
}
if (gb->apu.square_channels[index].pulse_length == 0) {
gb->apu.square_channels[index].pulse_length = 0x40;