public void set_lenctr_en(bool en)
{
if (!en)
{
//If the DMC bit is clear, the DMC bytes remaining will be set to 0
sample_length = 0;
//and the DMC will silence when it empties.
// (what does this mean? does out_deltacounter get reset to 0? maybe just that the out_silence flag gets set, but this is natural)
}
else
{
//only start playback if playback is stopped
if (sample_length == 0)
{
sample_address = user_address;
sample_length = user_length;
if (out_silence)
{
timer = 0;
out_bits_remaining = 0;
}
}
}
//irq is acknowledged or sure to be clear, in either case
apu.dmc_irq = false;
apu.SyncIRQ();
}
public void set_lenctr_en(bool en)
{
if (!en)
{
// If the DMC bit is clear, the DMC bytes remaining will be set to 0
// and the DMC will silence when it empties.
sample_length = 0;
}
else
{
// only start playback if playback is stopped
// Console.Write(sample_length); Console.Write(" "); Console.Write(sample_buffer_filled); Console.Write(" "); Console.Write(apu.dmc_irq); Console.Write("\n");
if (sample_length == 0)
{
sample_address = user_address;
sample_length = user_length;
}
if (!sample_buffer_filled)
{
// apparently the dmc is different if called from a cpu write, let's try
apu.call_from_write = true;
}
}
// irq is acknowledged or sure to be clear, in either case
apu.dmc_irq = false;
apu.SyncIRQ();
}