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amiga/paula.cpp: refine silence on empty DMA buffers

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This commit is contained in:
angelosa 2025-01-07 09:22:22 +01:00
parent fd93123881
commit 8a9fb029a2
1 changed files with 4 additions and 3 deletions
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7
src/mame/amiga/paula.cpp
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@ -363,11 +363,12 @@ void paula_device::sound_stream_update(sound_stream &stream, std::vector<read_st
if (chan->curlength == 0)
{
dma_reload(chan, false);
// reload the data pointer, otherwise aliasing / buzzing outside the given buffer will be heard
// For example: Xenon 2 sets up location=0x63298 length=0x20
// silence the data pointer, avoid DC offset
// - xenon2 sets up location=0x63298 length=0x20
// for silencing channels on-the-fly without relying on irqs.
// Without this the location will read at 0x632d8 (data=0x7a7d), causing annoying buzzing.
chan->dat = m_chipmem_r(chan->curlocation);
// - Ocean games (bchvolly, batmancc) also rely on this
chan->dat = 0; //m_chipmem_r(chan->curlocation);
}
}