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Fix AGB APU regression

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This commit is contained in:
Lior Halphon 2022-05-19 20:59:48 +03:00
parent 8c86cff486
commit 706135113c
1 changed files with 5 additions and 4 deletions
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9
Core/apu.c
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@ -68,10 +68,6 @@ static uint8_t agb_bias_for_channel(GB_gameboy_t *gb, unsigned index)
static void update_sample(GB_gameboy_t *gb, unsigned index, int8_t value, unsigned cycles_offset)
{
if (gb->model > GB_MODEL_CGB_E && index == GB_WAVE) {
/* For some reason, channel 3 is inverted on the AGB */
value ^= 0xF;
}
if (gb->model > GB_MODEL_CGB_E) {
/* On the AGB, because no analog mixing is done, the behavior of NR51 is a bit different.
@ -83,6 +79,11 @@ static void update_sample(GB_gameboy_t *gb, unsigned index, int8_t value, unsign
unsigned right_volume = (gb->io_registers[GB_IO_NR50] & 7) + 1;
unsigned left_volume = ((gb->io_registers[GB_IO_NR50] >> 4) & 7) + 1;
if (index == GB_WAVE) {
/* For some reason, channel 3 is inverted on the AGB */
value ^= 0xF;
}
GB_sample_t output;
uint8_t bias = agb_bias_for_channel(gb, index);