More correct emulation of manual clocking of channels 1 and 2
@@ -1000,11 +1000,12 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
else {
unsigned extra_delay = 0;
if (gb->model == GB_MODEL_CGB_E /* || gb->model == GB_MODEL_CGB_D */) {
- if ((!(value & 4) && ((gb->io_registers[reg] & 4) || old_sample_length == 0x3FF)) ||
- (old_sample_length == 0x7FF && gb->apu.square_channels[index].sample_length != 0x7FF)) {
+ 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 &&
old_sample_length != 0x7FF &&
(gb->apu.square_channels[index].current_sample_index & 0x80)) {
