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Use different sample index for square channel edge trigger depending on duty cycle

This commit is contained in:
Noah Sweilem 2023-06-11 16:23:26 -07:00
parent ec9536eede
commit ae855d470d
1 changed files with 4 additions and 1 deletions
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5
Core/apu.c
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@ -727,7 +727,10 @@ void GB_apu_run(GB_gameboy_t *gb, bool force)
}
gb->apu.square_channels[i].did_tick = true;
update_square_sample(gb, i);
if (gb->apu.square_channels[i].current_sample_index == 0) {
uint8_t duty = gb->io_registers[i == GB_SQUARE_1? GB_IO_NR11 :GB_IO_NR21] >> 6;
uint8_t edge_sample_index = (const uint8_t[]){7, 7, 5, 1}[duty];
if (gb->apu.square_channels[i].current_sample_index == edge_sample_index) {
gb->apu.square_channels[i].edge_triggered = true;
}
}